ADA Tejas (LCA) News and Discussions

Which role suits LCA 'Tejas' more than others from following options?

  • Interceptor-Defend Skies from Intruders.

    Votes: 342 51.3%
  • Airsuperiority-Complete control of the skies.

    Votes: 17 2.5%
  • Strike-Attack deep into enemy zone.

    Votes: 24 3.6%
  • Multirole-Perform multiple roles.

    Votes: 284 42.6%

  • Total voters
    667
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Bachchu Yadav

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Mr. ersakthivel, you are an excellent writer !!

And problem with you is that you write a lot but answer very little.
 

ersakthivel

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I asked the same question, they still have no answer.

If I point out that both Mirage-2000 and Mirage-III have very similar wing loading as the LCA, they won't have an answer to why both aircraft have a sustained turn rate lesser than F-16. Heck the "low wing loading" Mirage III has STR(15deg/s at Mach 0.6, sea level) and ITR(~20 deg/sec) that is very less compared to high wing loading F-16(450Kg/m2).

Wingloading for Mirage III is 298Kg/m2, Mirage-2000 is 283Kg/m2, LCA is 260Kg/m2, if you consider full internal fuel and 1000Kg payload.

No answer if you tell them 330Kg/m2+ aircraft like Rafale, EF and MKI have superior STR and ITR to all 3 aircraft above.

It's lie these guys were taught passenger aircraft physics during their school and college days.

They have never heard about lifting body designs either. They would not even have heard of a F-15 making it back to base with one wing torn off.

Anyway the reason why Mig-21, Mirage-III and MIrage-2000 have higher speeds is because of inlet cones on all 3 aircraft. These shock the air to subsonic speed before entering the compressor. Comparatively, LCA's inlets are very simple in design. So, speeds above Mach 1.8 are theoretically impossible with conventional engines.
I asked the same question, they still have no answer.

If I point out that both Mirage-2000 and Mirage-III have very similar wing loading as the LCA, they won't have an answer to why both aircraft have a sustained turn rate lesser than F-16. Heck the "low wing loading" Mirage III has STR(15deg/s at Mach 0.6, sea level) and ITR(~20 deg/sec) that is very less compared to high wing loading F-16(450Kg/m2).

mirage has a higher wing loading than LCA and 15 percent less twr , more weight.Sustained turn rate is less because of this.The mirage will beat F-16 in high altitude vertical fight, the F-16 will beat mirage in low altitude horizantal fight. All strictly in dogfight mode.the LCA's cranked delta , AOA and higher TWR will give it a much better STR than mirage on paper, we should wait for FOC to confirm that for MK-1.For MK-II there may be no doubts
Wingloading for Mirage III is 298Kg/m2, Mirage-2000 is 283Kg/m2, LCA is 260Kg/m2, if you consider full internal fuel and 1000Kg payload.

No answer if you tell them 330Kg/m2+ aircraft like Rafale, EF and MKI have superior STR and ITR to all 3 aircraft above.

If you want to save whatever credibilty left ,you should have posted TWR, AOA , and your question will be answered by itself.
It's lie these guys were taught passenger aircraft physics during their school and college days.

They have never heard about lifting body designs either. They would not even have heard of a F-15 making it back to base with one wing torn off.

Anyway the reason why Mig-21, Mirage-III and MIrage-2000 have higher speeds is because of inlet cones on all 3 aircraft. These shock the air to subsonic speed before entering the compressor. Comparatively, LCA's inlets are very simple in design. So, speeds above Mach 1.8 are theoretically impossible with conventional engines.
As usual you are your own source kind of argument.In MK-II only 5 percent size increase is proposed for significantly higher thrust. What are you going to argue. There are flow compression chambers under the wings and the position of inlet under the wing unlike mirage assures good airsupply.
 

ersakthivel

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Are you spokesperson for ADA or HAL ? Because you are behaving so....



Whom are you fooling ? LCA mk2 will be powered by GE 414 which have maximum thrust 98KN, but F 16 is powered by P&W F110 which have >120KN.

So the same 120KN is not available to LCAmk2 . Don't try to fool us !
try to google and get ge chiefs press statement that the Ge engine offered to india is THE HIGHEST THRUST VARIANT OF GE -414".
 

ersakthivel

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F414-GE-INS6

India's Aeronautical Development Agency selected the F414-GE-INS6 engine to power the Mk II version of the HAL Tejas Light Combat Aircraft (LCA) for the Indian Air Force. 99 engines were ordered in October 2010. The engine is to produce more thrust than previous F414 versions. It features a Full Authority Digital Electronic Control (FADEC) system.[21] The F414-GE-INS6 is to have six stages. The engines are to be delivered by 2013.[22]

Applications

Boeing F/A-18E/F Super Hornet
EADS Mako/HEAT
Saab Gripen Demo/NG
HAL Tejas Mark II[21]

Specifications (F414-400)

Data from General Electric[23]
General characteristics

Type: Afterburning turbofan
Length: 154 in (3,912 mm)
Diameter: 35 in (889 mm)
Dry weight: 2,445 lb (1,110 kg) max weight[24]
 

Bachchu Yadav

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F414-GE-INS6

India's Aeronautical Development Agency selected the F414-GE-INS6 engine to power the Mk II version of the HAL Tejas Light Combat Aircraft (LCA) for the Indian Air Force. 99 engines were ordered in October 2010. The engine is to produce more thrust than previous F414 versions. It features a Full Authority Digital Electronic Control (FADEC) system.[21] The F414-GE-INS6 is to have six stages. The engines are to be delivered by 2013.[22]

Applications

Boeing F/A-18E/F Super Hornet
EADS Mako/HEAT
Saab Gripen Demo/NG
HAL Tejas Mark II[21]

Specifications (F414-400)

Data from General Electric[23]
General characteristics

Type: Afterburning turbofan
Length: 154 in (3,912 mm)
Diameter: 35 in (889 mm)
Dry weight: 2,445 lb (1,110 kg) max weight[24]
Where is 120KN thrust ?

Again trying to fool us ?
it says more than previous 414 but it could be 98.1 ,98.2, 98.3 KN too !
 

Rahul Singh

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Do you have actual test results of the use of a chute on the aircraft we are talking about? No? So, no need to be so sure about it.
What data?

Nevertheless, fact is, BRS recovery chute is attached to top of fuselage (around CG in four point attachment) and this is the point around which an aircraft spins like a TOP after entering flat spin. The string in case of chute deployment will twist twist and twist more than enough to discard any lift parachute could generate if aircraft is in flat spin"¦"¦That's simple physics.

Is the HPT-32 imported? So, what's up with this import mania claim? Go buy Micromax and Akas tablet. If you don't have an imported phone or a tablet, then fine. If you do that makes you a hypocrite.

Buy only Indian. If you have even one foreign object in your home, like a LG TV, Samsung washing machine etc then you still are a hypocrite because all these have Indian equivalents.

No need to talk bad about the Armed forces importing if Indian equipment comes by reducing their quality standards.
Oh Ho Oh Ho. Ouch! Logical fallacy I see!

IAF is import manic because it never given importance to foreseeing requirements and working with designers to get product ready before or in due time. As provided earlier HTT-35 is one such example. This trainer was proposed as future replacement for HTP-32 back in 80s. If IAF had been such future seeing it would have well anticipated that some point early in next century they will need to replace HPT-32s. Provided the proposal, it was IAFs fault to not initiate HTT-35 program.

They just kept they face of any proposal for building replacements for HTP-32s and keep on waiting for HTP-32s to gray out? Why? Because when need will arise they could say oh we don't have any indigenous program for replacing HTP-32 so we go shopping.

Yeah! Right only CAG knows everything. How about IAF wanted to import even basic trainer but were shot down due to HAL's veto? Ever thought about that?
They just bought Pilatus-7. Never heard of any veto!

India is the only country where the DPSU can veto Armed forces decisions.
Not necessarily I support veto but yeah everybody will have to answer 'why' and 'why not'. After all this country is running on taxpayer's money not on Kuber ka Khzana.

No need to get all philosophical. 400 pilots dying is more important than 1 pilot dying, regardless of consequences and reasons. When you sign up for the armed forces it is not for a picnic.

USAF did not ground F-22s because a pilot died. They grounded the F-22s because the problems became public.
What i need to is i what i decide, not any tom dick and harry.

And grieving doesn't get less if your neighbor had met same fate.

Not even close. Mirage-2000s were expected to replace Mig-27s. Who the heck told you MRCA will replace Mig-21s? That is LCA's job.
IAF had some 400 Mig-21s (that's 50 percent of IAF's sanctioned strength); if LCA were to replace all of them (especially after IAF adopted new doctrine) then it means 50% percent of IAF was supposed to be LCA and nothing else. Oxymoronic! No? But math, simple math!

Oh! Please. The need always arises 10 years in advance before actual work is carried out. This has been the same for every armed forces for decades. The Navy pitched for a MRCA a few years ago. They will realistically get their own aircraft at the end of the decade. SFC is the same too and they may never even get it.
Oh please! The need was felt far back and need was needed to be fulfilled starting immediately that is why MKI deal was signed so far back in 90s amidst economic and political chaos.

And FYI for greater period Mig-21s constituted something like half the combat force of IAF and quite a number of squadron operating it was to be replaced by M-MRCA to start the transformation according to new doctrine.

Navy's M-MRCA need is for a carrier whose basic configuration is yet to be finalized let alone air group which by projected timelines will most certainly be comprising of 5th gen, so they can wait. This, as opposed to IAF's M-MRCA requirements which was to consolidate and maintain its fighting ability by replacing its ailing and out dated jets like Mig-21/23/27 and Jaguars and also to transform IAF from defensive force to capability based.

It may come as quite surprise to someone that changed requirement (asking LCA to now be a L-MRCA) asks LCA to replace part of Mig-23,27 and Jaguras as well, in addition to part of Mig-21.

Actually, it's the 'role' that these three jets in three different weight classes are fitting themselves into by replacing regardless of whatsoever Type was in charge earlier. For example part of Jaguar fleet is assigned for DPS, part of it for Maritime Strike and part of it is also for SEAD/DEAD at border level. The SEAD/DEAD role (at border level) is something which is to be taken over by L-MRCA , Maritime Strikes is something which is to be by MKIs and DPS (on target to target and sector to sector basis) will be taken over by MKIs as well as M-MRCAs and in some case even by LCA MK-2 . It is like, entire Jagaur fleet assigned various different roles will be replaced by proper and most suitable of H-MRCA , M-MRCA and L-MRCA in terms of assigned role and pre- assessed mission requirements, not necessarily that whole Jagaur fleet will see what is called type replacement, all and alone by M-MRCAs.

Capability based transformations asks for multirole platforms in three different weight class in order to let IAF fulfill its duties cost effectively. Theoretically, while Peshawar based PAF stations will be targeted by MKI, Karachi based by M-MRCA, the short range border level attack requirement will be meet by L-MRCA class LCA. And in air to air mode. While MKIs will fight for air superiority over enemy air space, LCA MK-2 will defend homeland airspace and M-MRCA will play as plug-in between these two.

Bit into history: It was actually F-16 purchase by PAF that initiated though process for transforming IAF from just a defensive and reactionary force to capability based one in most cost effective manner"¦"¦"¦"¦"¦.Mirage-2000 being first truly multirole platform exemplified advantages of having and benefits of operating multirole platforms and experiences with maintaining Mig-23s, Mig-29s and Mirages 2000Hs (all of which were bought in extreme rush to counter PAF's newly acquired capability in the form of F-16s) taught them about importance of operating common platform in greater number over operating many types with crisscrossed* capability in small numbers.

* IAF bought both Mig-27s and Jaguars. Both air crafts are optimized for low level high speed air interdiction and ground attack missions and are equally capable unprepared airstrip operators, that apart from other similarities. Yet both were bought!


Vegetables right? Go buy what you want in a second?

What the IAF did, nobody else has done ever. Period.
Now Vegetables, Earlier plastic Chair, wonder what next? Logical fallacy going wild!

Like I said earlier it was very easy to buy more Mirages to replace older Mig-21s and save good percentage of lives of 400 blamed on LCA.


Right. And you think if we only pitted EF and Rafale do you think 5th gen avionics would have come cheap? It was Boeing which brought in the AESA, not the others.

This will be the cheapest way to buy Rafale and this has been done many times. Did oyu know about the controversy surrounding the one of our earliest tenders involving Mirage-3s, Jaguars and Viggen. Sanjay Gandhi's interference after Jag was selected because Viggen was the supposedly superior platform. But IAF insisted they always wanted the Jag and after that Sanjay backed off. Well, same case.
Ok then, cheapest way is justified over death of good percentage of 400 pilots.

Point was 'this' and always 'this'. And I always knew what. No need to be told by any tom dick and harry.

BTW that waiting will now cost taxpayers some 15 rupees more for every US dollar spent. For 10 billion US dollars it's like some 150 billion rupees, which is some 2.5 billion US dollars that of course if 10 billion dollar is considered as ultimate price for M-MRCA disregarding inflation.

* From what I know IAF preferred choice was Viggen but deal could not fructify because of US pressure and objection prohibiting re-sale of P&W JT8D to India.

Super MKIs and PAKFA... what now?
Super Duper MKI is not Fifth Gen, neither is Rafale nor were any contenders, they are no match for fifth gen fighter. In face of threats like J-20 and J-31 they are just 4.5 gen fighters.

And point was and is, if LCA is obsolete then what they are? Someone can say, at least money spent on LCA comes home but where does on M-MRCAs go?

Most probably Navy, not PLAAF.
How about as PLAAF's J-10 replacement? And also as PAF future jet bought on credit? Why would not China give J-31 in quite a number to PAF and ask them to harass us from their side during any Chinese aggression?


IAF wanted that. But we don't know why GoI interfered. But it happened for the good.
Oh! it happened for good!

Lives of quite many Mig-21 pilots were lost which could otherwise have been saved if Mirage-2000s had replaced their part of Mig-21 squadron (now poised for transformation to M-MRCA type) in due time. And people who cry ocean over death of IAF pilots (but only to blame LCA) says it happened for good?

Secondly if Mirages had been bought in time IAF could have operated with good strength for what is now called era of depleting strength. {Thank god, we were not attacked in between}

Also what 'good' is to buy 4.5 jets at such huge expenditure when enemy will be fielding 5 gen soon, may be just after first example will get inducted?


Kaveri was well funded even before 1989. The 1991 thing was LCA's issue.
Its platform that comes first, not sub-systems.

That's why dates were pushed to 1999 induction from 1996. Instead is became 2006 with first flight in 1999, then 2009, then 2011. What about now? Money is there, infrastructure is there. Even then there is that extra 6 years of delay.
Before LCA actually flew on 4th Jan 2001 people used to say "Damn thing won't even fly""¦"¦..

When Test pilot is most important link between designer and user and most important part of test-development period, the IAF test pilots were getting oriented and leaving.

Actually, not before ACM FH Major took charge, the LCA program received any coordination and active support by and from its prime user. It was in his tenure when IAF actually embedded a senior officer whose task was to report work progress back to AHQ ACM office every month and coordinate between ADA/HAL and AHQ.

You are talking about things that happened 20 years ago. Remember that. Only technology stopped LCA's progress after funding was approved. There was no FBW until 1999 even after Dassault offered an Analog one. DRDO pushed LCA's specs up, not IAF.
If funding had been made available even couple of years before it was made, the CLAW team would have got their FBW/DFCC/FCS testing completed before 1998 (Pokhran-2), that's before US sanctions hit. Need I mention how severely did FBW/DFCC/FCS rework hit in terms of time and money?

First flight was delayed which delayed completion of Phase-1, delay in completion of phase-1 delayed sanctioning of Phase-2 and list goes on.

Just another example.

Wrong. Digital FCS was ADA's decision. Every Tom, Dick and Harry who knows LCA's history knows this aspect. IAF merely laughed and rightly so.
Proving Digital FCS was mandatory part of Phase-1 after project was sanctioned on condition. And that condition was condition for getting clearance for phase-2. It not necessary means, it was IAF which actually demanded for Digital FCS for LCA. It just means DRDO was given clearance for LCA phase-1 on condition that it will demonstrate it can develop Digital FCS for which it claims it can"¦"¦"¦"¦"¦"¦"¦"¦.. And any tom dick and harry who knows even bit of LCA history will ever need this much clarification to understand what is being said?

And Digital FBW not analog, yes quite typical of scientist to look future. But why did not IAF mandated imported analog for first batch? Apparently IAF thought, they have been handed over death nerve (they were sure that DRDO will fail on this account and phase-1 will never be successful) and it will let them get rid of LCA, once DRDO fails at phase-1. Isn't their laughing reflective of their thinking?

But did DRDO failed in developing digital FCS? We all know what happened and how 'laughing asses' of IAF were replied too? So what would have happened instead if IAF had mandated imported FCS for first batch and indigenous starting next? Who after all was natural party for holding the job of 'Project Management' among IAF (User) and a Lab based newly born design and development agency (with no experience about how things work in real world)? Need i answer?

May I repeat say, if IAF had mandated imported FCS for first batch then LCA would have got in air (much before it did) in addition to country developing digital FCS, all almost simultaneously?

I don't blame scientist community for being ambitious and thinking beyond practically achievable targets because it is this very attitude which drives them towards future.

Austin's mail to me;
No R-60 now, but R-73, no more custom avionic architecture but open one"¦"¦"¦"¦ Oh yeas ADA was damn right on Digital FCS, they probably sensed future and rightly stepped towards.

From what i understand from P Rajkumars write up in FORCE and his book the LCA was actually a fighter which IAF specd it to something which DRDO could develop like JF-17 types but then* DRDO over speced it adding all bells and whistles* that the best was available and not available *having zero experience in developing those* in to a *smallest and lightest fighter* in the world all this complication led to almost the project going on for almost 25 years
Of course it was, LCA in most early form is brain child of Idris Latif. But why question DRDO? Did they display an attitude any different from what a good scientist community shall and always do? How hard it is understand that Scientist do think far beyond what it is at present? Isn't this very attitude which let them jump into unknown to come up with what is called 'futuristic'?

But then when matter of concern is some product for particular user things are managed differently. Since last thing you want is ask scientist to limit their thinking, you choose mid path, which is, you draw things on the 'priority' list; starting from easily achievable to end up with achievable but in time. That's how 'Block-XYZ' development style came into existence and it is for a reason why it is standard practice since then?

Having said all, question arises, back then who should have taken charge of drawing clear Road- Map and enforcing it strictly? I mean who had the top authority?

Obvious hint comes in form of Builder-Landlord relationship. Every builder explains his potential in widest form he can to a landlord looking to get his house build. However no matter what builder says, an intelligent landlord always gets what he wants where he wants and how he wants.

Also, this. A very important point that everybody *"conveniently"* forgets.


IAF is not entirely happy with LCA but as user its still supporting the program while operationally its keeping MMRCA as hedge should it get more delayed and *ofcourse its their primary job as well to protect the country.*
That since ACM FHM took charge and officers like PK Barbora came to prominence, that's whole 6 years after first flight and 16 years after first funding starting coming in.

Yes IAF has been supporting LCA program since last 5-6 years and without it LCA MK-2 would not have been possible. But alas! IAF never had officers like FHM, PK Barbora and like at top after ACM Idris Latif retired and before ACM FHM took charge.

Much better than your 50% figure. So, I was correcting your mistake. All the extras not necessary.
Nothing better even when your figure of 30 percent is true (which is not) when it is related to most important aspect of combat flying. 30 % of 400 is 120, wonder who you are fighting?

Now, am I questioning professionalism of IAF? Hell no. But am I questioning its futile practices? Oh yes and will continue?

Correcting a mistake is providing a link when proclaimer is no horse-mouth but just another Tom Dick and Harry.

Good. Now you are thinking along the lines of a critic. However you forget that most of this was already mandated. Just that DRDO took it a notch further and complicated it. We will develop radar, we will develop FCS, we will develop 4th gen avionics, we will develop this, that etc. Afterall how will they justify their budget and work if everything was imported.
Always did, not just now. But do i need acknowledgement for it? Hell no!

Mandating is forcing not giving options. A concurrent development of otherwise never being attempted consequently shall be imported sub-systems for initial batches was probably the best way though which IAF would have got their jets and DRDO community would have got their opportunity towards venturing into futuristic aviation tech and country would have got what it is still dreaming of.

Scientist always thinks beyond the horizon and user thinks practically, so it was IAF's job to make both happen. After all IAF together with national air carriers are indirectly responsible for nurturing countrie's aero-space industry.

:pfft: Ok...
:pfft: Ok...

No, actually I don't. It is just that IAF is criticized for the wrong things not where they need to be criticized.
If ADA is criticized for death of Mig-21 pilots then IAF will also criticized for foot dribbling M-MRCA which had its fare share in the death of pilots.

Again. Idiotic assumptions without knowing facts. IAF bought a lot of Maruts if you have forgotten. Isn't that enough? Nobody offered a better engine and hence the project died. India couldn't build one engine on it's own.
Again, idiotic sense of understanding. Re-read what I had written to which you replied, especially underlined part.

Quote Country should have never let experience gained through HF-24 project go wasted, no matter what, work should have continued. Unfortunately after HF-24, neither Government nor IAF showed any interest in perusing expertize in the domain of at least power plant let alone in any new proposal for follow on fighter projects. Least could IAF have done was to ask DRDO and Gov for starting serious work ( in the form of TD) on various critical technological fronts like development of Turbofan tech, Airborne fighter class MMR, INS, futuristic airframe materials etc. unquote

Btw, Mig-21s crashes attributed to human error were primarily due to training inadequacies. This was due to the lack of an advanced trainer. Whatever HPT-32s faults, it had nothing to do with Mig-21 crashes. The absence of Hawk or equivalent was, something IAF sorely needed since the 80s but was denied for any number of reasons.
Non availability of AJT is just prevarication, ISKARA as AJT was with IAF since long time and this fact needs to be re-mentioned.

BTW who said HTP-32s have anything to do with Mig-21 crashes? HPT-32 example is just to show IAF's madness towards shopping discarding the importance of indigenous development? And yeah, to some extent towards their saying "unavailability of BFT won't affect training" (referring to present form of training being conducted at AFA where rookies are being sent directly to HJT-16 or IJT stage)

Ok. Your opinion, something I don't share. Neither do many economists.
PM referred to 1991, many economist saying presently we are passing through 1991 like situation. Our credit being junked, PM (the Economist and supposed hero of 1991) being referred to as useless and it's only my opinion! Wow!

And another FYI, economy can be brought on track after selling entire country but population growth can't be checked so dynamically. And large population nullifies economic growth. So no, FM won't have enough money to buy and equip IAF with 1000 30 ton jet fighters by 2025 and beyond (as you predicted in earlier post) if population is not checked. And like I said earlier, population growth doesn't fluctuate as dynamically as economic growth figure.

Unless country pulls up its industrial and agricultural production to help bring production-consumption deficit to normal (at least), we are dead. Let alone we be a trillion economy with any meaningful significance which can buy 1000 plus jet fighter with over 150 million a piece.

BTW I am dreaming of US dropping anchor for letting us surpass.

Even IAF cannot predict.
I always know they can't, but you surely can like you did previously.


The battlespace isn't large enough for such a large number. We an probably fit 80-100MKIs in the NE and the same in the North. Nothing more. Attrition based warfare, we will see.
You mean stretch form From Nalia to Twang is not large (long) enough? Wow"¦"¦"¦.May I again add two front war! BTW who's stopping PLAAF from entering through Nepalese and Bhutanese airspace? BTW need I mention some 2000 fighter strong enemy also?

More pilots dead. Also that talk of LCA being low RCS is plain nonsense. It is a regular aircraft with a RCS like that of a truck. Been repeating the same thing all over the forum.
LCA is small like very small, uses carbon composite by the highest percentage, Y shaped engine intake conceals much of engine blades, and tailless delta wing configuration gives it smaller span, include RAM as well. And saying "LCA has small RCS" is plain nonsense? Wow!

AWACS don't give target lock information. They only vector aircraft to targets. Only missile "blind" shots may work and those shots don't kill. They only have a tactical significance.

Read this small passage and see if you understand. Page 69.
Flying Magazine - Google Books

If you have doubts from the above I will explain what happened.
It did not surprise me at all after to you posted a link talking about 1996. Huh 1996, the time when AWACS was nothing but airborne cousin of GCI. The time when it used to see airborne object as a dot over a circular CRT display marked with hard painted compass marking. Had radio beam projecting dish/plates under a swollen Roti shaped radome constantly on swivel (rotodome) with bullock-cart age revisit time. And when data transfer was just voice communication.

Come back to present age of AESA based AEW&C which has thousands of Transmitter Receiver, computer controlled electronically steered agile beams, advanced processing units, advanced algorithms based computers which can plot a flying object accurately in 3D space and keep updating it with interval as less as nano seconds.

But it doesn't ends here, they can Track as many as (-,+)60 flying targets while scanning required piece of airspace constantly thanks to thousands on Transmitter and Receivers and powerful computers enabling 'Track while Scan'. Furthermore, these modern days AESA platforms are equipped with SATLINKS and tactical wideband DATA Links using which it can pass all the data its receiving client needs in what is called 'real time'. But is it all? No! These modern day AESA based AEW&C can be linked with numerous many sensors lying quite a distance apart to produce fused information or common picture of very wide area, something which can be distributed to anyone and everyone in necessity.

Now since we are talking about AEW&C providing firing solution for Active BVRAAM shoot, let me start by asking, what information does an Active BVRAAM (which at least has one way date link) needs for its initial phase and midcourse guidance? Is it anything more than continuously updated 3D coordinates of its moving target? How about carrier aircraft receiving tracking information from AEW&C (which is tracking a particular target) and passing/relaying it to its missile in real time? Need i remind that almost all active BVRAAM are equipped with one way data link using which it continuously receives updated 3D coordinated about its target and corrects its flight path accordingly (in nano seconds) and continuously in order to reach to a point (in least possible time) where its own radar can lock on that particular target?

Now, here, am I talking of alien era? BTW who is ignorant enough to not be aware of US Navy Cooperative Engagement Capability and its demonstration with live firing?

http://www.globalsecurity.org/military/library/news/2009/06/mil-090605-nns01.htm Integrated Live-Fire Test Demonstrates Future Weapons System Capability
[/url]

Navy NewsStand
StoryNumber:NNS090605-32
Release Date: 6/5/2009 11:05:00 PM
From Office of Naval Research Corporate Communications


ARLINGTON, Va. (NNS) -- The Office of Naval Research (ONR) conducted a live-fire test, demonstrating the ability to execute an overland integrated fire control (IFC) capability against a cruise missile target May 29.
The Navy's efforts in IFC reached a milestone by achieving a successful live-fire mission at White Sands Missile Range, N.M., utilizing an air-directed surface-to-air missile architecture. ONR coordinated this event through a future naval capabilities project called Advance Area Defense Interceptor. The objective was to demonstrate the ability to execute an overland IFC capability against a cruise missile target.
This test utilized a family of systems, comprising representative components of the following Navy programs of record: E-2D Advanced Hawkeye (PMA-231 & Northrop Grumman Integrated Systems, Bethpage, N.Y.), Cooperative Engagement Capability (Program Executive Office Integrated Warfare Systems 6 & Raytheon Network Centric Systems, St. Petersburg, Fla.), Aegis Weapon Control System (PEO IWS 1 & Lockheed Martin Maritime Systems and Sensors, Moorestown, N.J.) and Standard Missile 6 (PEO IWS 3& Raytheon Missile Systems, Tucson, Ariz.).
All systems performed as expected for a successful demonstration of this future weapon system capability.





That's your small RCS, but to a radar, LCA is a flying truck. LCA's small size is useful in only one place, dog fights and that's only if the other aircraft does not have a 360degree IRST.
Who knows if LCA is like TATA LPTA truck or TATA NANO to a RADAR? At least LCA tech and design is indicative of something.

4 J-11s will be equal to a formation of 12 LCA Mk2s and 2 tankers. That's the math.
12 LCA MK-2 operating from AFS 80-100 kms inside border intercepting intruding formation of 4 J-11 with equally capable BVRAAM, descent MMR and featuring smaller RCS and for most of time under guidance from AEW&C. Not to forget most important point, regardless of J-11 MMR's detection range they will be firing only at same range (maximum range of BVRAAM) as LCA's BVRAAM. Do the math.

On RCS issue:

There one time USAF F-16s went against IAF Mig-21s during a friendly duel and Mig-21 sneaked all way through without detection until they were at advantage position. USAF said F-16 MMRs were operating at retarded range. But it did never discount the fact that Mig-21's smaller size induced smaller RCS helped it happen. Now add to it carbon-composite airframe by highest percentage and where we are?

LCA's RCS is 3 times smaller than Mirage-2000. Rafale's RCS is 10 times smaller. F-22 is 10000 times smaller. Difference?
Of course Rafale has electronics which confuses enemy's radar about its RCS or actively makes it appear smaller, F-22 is different deal all together and LCA is defiantly smaller (RCS wise and size wise) than all metal Mirage-2000. But is it only 3 times smaller (RCS wise) or more, who knows?

Yeah, I noticed. But I believe that could be emergency thrust. But I guess it is fine, and it still makes the aircraft underpowered though. This is only counting T/W ratio and not a whole host of other reasons like inlet design, drag, unnecessary weight etc.
Original requirement for LCA MK-2 is 90 KN, and MK-1's engine can provide that much in Combat Thrust mode, doesn't that says all?

But that's F-404IN20 and MK-1 only, MK-2 is getting way over that is 98 KN. But even that's of baseline F-414 only. I remember GE saying F-414 INS6 will be most powerful version of F-414 produced so far. Was GE talking in air? I don't think so.

Ok. That's cute. Do you see me believing it? No.
Does it any matter? That's the question.

Anyway following is pic of PV-1 undergoing transformation to EW prototype. Interested people shall focus on spine.





BROADSWORD says: THIS AIRCRAFT --- PV1 --- IS BEING MODIFIED FOR THE ELECTRONIC WARFARE ROLE

That's in effect a new aircraft. Let's talk about Tejas Mk3 after Mk2 is flying shall we
To me, it's just a block upgrade, even MLU. Sometime ago Italians tried what can be called modular upgrade approach towards reducing RCS of an existing platform significantly on Alenia Aermacchi M-346 Master. They tested by putting reshaped nose cone, new intake, rest of minor modification etc over existing airframe. I believe similar modifications can also be carried out on LCA MK-2 due for MLU. As for weapons, LCA has option for BVRAAM specific (conformal) weapon bay at wing root cavity (one on each) apart from option for podded weapon bay mounted on regular pylons. Further, there is high possibility that in future, weapons with reduced RCS will become reality, which naturally will do away with requirement of podded weapon bay in some cases.

BTW whole point behind bringing this issue is to point towards level of flexibility LCA has over M-MRCA when it comes to future upgrades (necessitating structural changes) in wake of increase threat"¦.. Of course there is TOT but will it allow us to make structural changes without roping in original designer?

BTW Future talk, yeah future talk who doesn't do?

Well! Best of luck to them. But they will die.
Considering disadvantage PAF has over IAF it is not out of world thought to say PAF might be working to get such capability (talking about AEW&C passing on firing solutions to linked up fighters). And from what I know Pakistanis are already in process of networking their sensors.

Same back to you matey. At least let's get some LCA history straight instead of making assumptions.
Same again returned to you matey, never accepted in first place"¦. No expert but i know enough of LCA history at least for you!

Also, as a FYI, the MKI will be locking on to the LCA at 180km while the LCA will be locking on to the MKI at, say, 120 or 130Km. And that is only considering the MKI maneuvers himself within the LCA's radar cone, like a moron, which won't happen.

Just so you know, to reduce radar detection range by 50% you will need to reduce RCS by 15 times. Also, The MKIs new upgrade will allow LCA detection at max possible range of ~400Km(like AWACS) even if the LCA is flying low. Just so we get the math right

Current Irbis-E specs call for a LCA detection at 400Km and a lock at probably 70% of the range.
FYI it's the 'Engagement Range' (the maximum possible range of any BVRAAM) which will eventually matter in any such engagement, not detection range of any platform. An AEW&C will easily make up for shorter detection range of LCA's MMR, an equally capable BVRAAM being carried by LCA will take care of engagement range, operations close to its base will take care of combat endurance and flying in formation (having number advantage) will take care of combat load, that all while intercepting any formation of Chinese J-11 and J-10s. Do the math.

Another FYI, in a recent simulation conducted by USAF when selling the F-35 to a customer, they determined that even the F-35 stands no chance against the Su-35 if support aircraft like tankers and AWACS are taken out. So, you decide where LCA (a Mirage-2000 equivalent) stands as of today.
Plenty many rumors and news quoting unnamed sources. May be true may be not. USAF is still going along with its plan to have F-35A as its backbone for future and they are not idiot bunch.

BTW hard to believe that SU-35 which exposes its turbine blades (frontal assets as much as it will ashame Mallika Sehrawat) actually holds upper hand to a fighter which conceals its blades like a Ghunghat Clad cultured lady!

And what other advantage apart from more radar power and relatively higher volume of fuel and load weapon SU-35 has over F-35? Does SU-35 carriers weapons which can engage F-35 before its APG-81 and 120D can engage SU-35?

It is nice to know the basics before jumping to conclusions, no?
Yeah rightly said, good for you!
 
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ersakthivel

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Where is 120KN thrust ?

Again trying to fool us ?
it says more than previous 414 but it could be 98.1 ,98.2, 98.3 KN too !
F414-EPE
The "Enhanced Performance Engine" or "EPE" variant, includes a new core and a redesigned fan and compressor. The new engine version offers up to a 20 percent thrust boost, which increases its thrust to 26,400 pounds (120 kN), giving it an almost 11:1 thrust/weight ratio.

F414-GE-INS6
India's Aeronautical Development Agency selected the F414-GE-INS6 engine to power the Mk II version of the HAL Tejas Light Combat Aircraft (LCA) for the Indian Air Force. 99 engines were ordered in October 2010. The engine is to produce more thrust than previous F414 versions. It features a Full Authority Digital Electronic Control (FADEC) system.[21] The F414-GE-INS6 is to have six stages. The engines are to be delivered by 2013
 

ersakthivel

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Bachchu Yadav have you cleared your doubts regarding the thrust of the engine.This will be the same engine on grippen too.I am not a spoksman of ADA.or DRDO.
Please go through all the posts patiently and you can pretty much know everything. No complex equations and electronic schematic diagrams are posted here. Links are given and just plain basics only I have posted. You can google yourself and check each and every one of my statement and please report if you have find any inacccuracies.
 

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F414-EPE
The "Enhanced Performance Engine" or "EPE" variant, includes a new core and a redesigned fan and compressor. The new engine version offers up to a 20 percent thrust boost, which increases its thrust to 26,400 pounds (120 kN), giving it an almost 11:1 thrust/weight ratio.

F414-GE-INS6
India's Aeronautical Development Agency selected the F414-GE-INS6 engine to power the Mk II version of the HAL Tejas Light Combat Aircraft (LCA) for the Indian Air Force. 99 engines were ordered in October 2010. The engine is to produce more thrust than previous F414 versions. It features a Full Authority Digital Electronic Control (FADEC) system.[21] The F414-GE-INS6 is to have six stages. The engines are to be delivered by 2013
Do you want us to conclude that EPE is an previous versions of F414 ?

but it is not ! EPE and EDE are two model currently under development .

When they previous version then it is F414-400.

PLZ look at original GE site , what is say about f414.

The F414-400 is the most advanced turbofan engine in its class. Launched in 1998, today it powers U.S. Navy and Australian Super Hornets.

F414 | Military Engines | Military Jet | Turbofan | GE Aviation
 

ersakthivel

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I asked the same question, they still have no answer.

If I point out that both Mirage-2000 and Mirage-III have very similar wing loading as the LCA, they won't have an answer to why both aircraft have a sustained turn rate lesser than F-16. Heck the "low wing loading" Mirage III has STR(15deg/s at Mach 0.6, sea level) and ITR(~20 deg/sec) that is very less compared to high wing loading F-16(450Kg/m2).

Wingloading for Mirage III is 298Kg/m2, Mirage-2000 is 283Kg/m2, LCA is 260Kg/m2, if you consider full internal fuel and 1000Kg payload.

No answer if you tell them 330Kg/m2+ aircraft like Rafale, EF and MKI have superior STR and ITR to all 3 aircraft above.

It's lie these guys were taught passenger aircraft physics during their school and college days.

They have never heard about lifting body designs either. They would not even have heard of a F-15 making it back to base with one wing torn off.

Anyway the reason why Mig-21, Mirage-III and MIrage-2000 have higher speeds is because of inlet cones on all 3 aircraft. These shock the air to subsonic speed before entering the compressor. Comparatively, LCA's inlets are very simple in design. So, speeds above Mach 1.8 are theoretically impossible with conventional engines.
Before asking questions please write something useful and coherent regarding wing loading with your own technocrat knowledge.How come you make so many posts without even knowing this basic aerdynamic fact,

I just went through your posts in ARJUN thread and your duel with P.MAITRA. Despite twenty posts you didnot open your mouth regarding queries whether you have read any IEEE paper. And ended up begging I am going to eat, I am going to sleep

.Then you asked KUNAL BISWAS how much power is required to power a tank.Why don't you google and find the stuff and write something about it? KUNAL replied"Tea stall" and you just kept quiet. Before posting stuff on the forum You should make some preparation or you will repeatedly end up a laughing stock Quoting all the racially motivated stuff written in Flight global Austin and saying without a bigger radar LCA wont fire a long range BVR.

And saying believe Dr.CARLO KOPP, don't believe saying believe Dr.CARLO KOPP and then quoting Dr.CARLO KOPP,

If I quote RAND study and argue that long range BVR shots against evasive action taking ew equipped air crafts are in reality a pipe dream , you argue like a school boy for 20 pages.

If I were you I would hang my head in shame for the way you posted that no IRST can give guidance. Then when I gave the link from METEOR site and AIM 120 BVR site you are keeping quiet. They are just one google away. If you don't update your self why are you making all knowing statemanets?
 

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Before asking questions please write something useful and coherent regarding wing loading with your own technocrat knowledge.How come you make so many posts without even knowing this basic aerdynamic fact,

I just went through your posts in ARJUN thread and your duel with P.MAITRA. Despite twenty posts you didnot open your mouth regarding queries whether you have read any IEEE paper. And ended up begging I am going to eat, I am going to sleep

.Then you asked KUNAL BISWAS how much power is required to power a tank.Why don't you google and find the stuff and write something about it? KUNAL replied"Tea stall" and you just kept quiet. Before posting stuff on the forum You should make some preparation or you will repeatedly end up a laughing stock Quoting all the racially motivated stuff written in Flight global Austin and saying without a bigger radar LCA wont fire a long range BVR.

And saying believe Dr.CARLO KOPP, don't believe saying believe Dr.CARLO KOPP and then quoting Dr.CARLO KOPP,

If I quote RAND study and argue that long range BVR shots against evasive action taking ew equipped air crafts are in reality a pipe dream , you argue like a school boy for 20 pages.

If I were you I would hang my head in shame for the way you posted that no IRST can give guidance. Then when I gave the link from METEOR site and AIM 120 BVR site you are keeping quiet. They are just one google away. If you don't update your self why are you making all knowing statemanets?
Lolz .. you fried the fish !:thumb:
 
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p2prada

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They just bought Pilatus-7. Never heard of any veto!
20 years after Deepak failed.

Not necessarily I support veto but yeah everybody will have to answer 'why' and 'why not'. After all this country is running on taxpayer's money not on Kuber ka Khzana.

What i need to is i what i decide, not any tom dick and harry.
They don't need your valuable inputs for it.

IAF had some 400 Mig-21s (that's 50 percent of IAF's sanctioned strength); if LCA were to replace all of them (especially after IAF adopted new doctrine) then it means 50% percent of IAF was supposed to be LCA and nothing else. Oxymoronic! No? But math, simple math!
That was the initial plan. Not anymore.

Oh please! The need was felt far back and need was needed to be fulfilled starting immediately that is why MKI deal was signed so far back in 90s amidst economic and political chaos.
Mig-27s needed replacement. Of course.

And FYI for greater period Mig-21s constituted something like half the combat force of IAF and quite a number of squadron operating it was to be replaced by M-MRCA to start the transformation according to new doctrine.
:pfft: ok.

Actually, it's the 'role' that these three jets in three different weight classes are fitting themselves into by replacing regardless of whatsoever Type was in charge earlier. For example part of Jaguar fleet is assigned for DPS, part of it for Maritime Strike and part of it is also for SEAD/DEAD at border level. The SEAD/DEAD role (at border level) is something which is to be taken over by L-MRCA , Maritime Strikes is something which is to be by MKIs and DPS (on target to target and sector to sector basis) will be taken over by MKIs as well as M-MRCAs and in some case even by LCA MK-2 . It is like, entire Jagaur fleet assigned various different roles will be replaced by proper and most suitable of H-MRCA , M-MRCA and L-MRCA in terms of assigned role and pre- assessed mission requirements, not necessarily that whole Jagaur fleet will see what is called type replacement, all and alone by M-MRCAs.
All stuff for LCA Mk2. And depending on orders. 4 squadrons of LCA Mk2 won't do anything.

Like I said earlier it was very easy to buy more Mirages to replace older Mig-21s and save good percentage of lives of 400 blamed on LCA.
Not at a cost we can afford. US engines are coming at twice the cost as what USN pays. Same for C-17s. French are bigger ripoffs than the Americans.

Ok then, cheapest way is justified over death of good percentage of 400 pilots.
You are confusing the two. Rafale will replace Mig-27s not Mig-21s. MKI replace Mig-21s. LCA is just the sore thumb in the force.

BTW that waiting will now cost taxpayers some 15 rupees more for every US dollar spent. For 10 billion US dollars it's like some 150 billion rupees, which is some 2.5 billion US dollars that of course if 10 billion dollar is considered as ultimate price for M-MRCA disregarding inflation.
This deal is over 15 years. Go learn economics properly. Learn what will happen when the currency strengthens against the Dollar over a 15 year period.

* From what I know IAF preferred choice was Viggen but deal could not fructify because of US pressure and objection prohibiting re-sale of P&W JT8D to India.
It was a myth.

Super Duper MKI is not Fifth Gen, neither is Rafale nor were any contenders, they are no match for fifth gen fighter. In face of threats like J-20 and J-31 they are just 4.5 gen fighters.
They have the payload and endurance to match 5th gen aircraft. They will have better success when working together with PAKFA and AMCA. We have MKI now, we will have Rafale in 3 years.

LCA only in 8 years.

And point was and is, if LCA is obsolete then what they are? Someone can say, at least money spent on LCA comes home but where does on M-MRCAs go?
LCA Mk2 is a Mirage-2000. Rafale and MKI are far superior to the Mirage-2000.

How about as PLAAF's J-10 replacement? And also as PAF future jet bought on credit? Why would not China give J-31 in quite a number to PAF and ask them to harass us from their side during any Chinese aggression?
High risk is it not. But F-35 is not ready. The only medium 5th gen aircraft available by 2015 is "nothing." Rafale is the next best option.

Anyway F-35 was equated to PAKFA by IAF. IAF supposedly chose PAKFA in 2007 after evaluating F-35 back in 2004-05, according to a recent article.

Lives of quite many Mig-21 pilots were lost which could otherwise have been saved if Mirage-2000s had replaced their part of Mig-21 squadron (now poised for transformation to M-MRCA type) in due time. And people who cry ocean over death of IAF pilots (but only to blame LCA) says it happened for good?
Are you another person with poor comprehension skills? Rafale is a replacement for Mig-27s, not Mig-21s.

The 400 pilots killed is ADA's forte for not delivering on the LCA.

If funding had been made available even couple of years before it was made, the CLAW team would have got their FBW/DFCC/FCS testing completed before 1998 (Pokhran-2), that's before US sanctions hit. Need I mention how severely did FBW/DFCC/FCS rework hit in terms of time and money?
Speculation. CLAW team did not even exist before 1992. Couple of years is in your dream.

Like I said, get LCA's history right.

First flight was delayed which delayed completion of Phase-1, delay in completion of phase-1 delayed sanctioning of Phase-2 and list goes on.
First flight was delayed because there was no FBW available. Structural defects were also found in TD-1 and 2.

Proving Digital FCS was mandatory part of Phase-1 after project was sanctioned on condition. And that condition was condition for getting clearance for phase-2. It not necessary means, it was IAF which actually demanded for Digital FCS for LCA. It just means DRDO was given clearance for LCA phase-1 on condition that it will demonstrate it can develop Digital FCS for which it claims it can"¦"¦"¦"¦"¦"¦"¦"¦.. And any tom dick and harry who knows even bit of LCA history will ever need this much clarification to understand what is being said?

And Digital FBW not analog, yes quite typical of scientist to look future. But why did not IAF mandated imported analog for first batch? Apparently IAF thought, they have been handed over death nerve (they were sure that DRDO will fail on this account and phase-1 will never be successful) and it will let them get rid of LCA, once DRDO fails at phase-1. Isn't their laughing reflective of their thinking?

But did DRDO failed in developing digital FCS? We all know what happened and how 'laughing asses' of IAF were replied too? So what would have happened instead if IAF had mandated imported FCS for first batch and indigenous starting next? Who after all was natural party for holding the job of 'Project Management' among IAF (User) and a Lab based newly born design and development agency (with no experience about how things work in real world)? Need i answer?
Silly reasoning. ADA wasted time with digital FBW. IAF was right when they said ADA is not capable.

The digital FCS could have come on the Mk2.

May I repeat say, if IAF had mandated imported FCS for first batch then LCA would have got in air (much before it did) in addition to country developing digital FCS, all almost simultaneously?
Would have been good for the entire program. 20 years later, LCA will be fully inducted only in 2020, when actual specs will be met in a full squadron.

I don't blame scientist community for being ambitious and thinking beyond practically achievable targets because it is this very attitude which drives them towards future.
Realism? Being realistic goes to the dogs then.

You need to be a really slow to still believe in LCA's 2020 timeframe.

Yes IAF has been supporting LCA program since last 5-6 years and without it LCA MK-2 would not have been possible. But alas! IAF never had officers like FHM, PK Barbora and like at top after ACM Idris Latif retired and before ACM FHM took charge.
Heard of AM P Rajkumar?

Indian Air Force :: The Tejas Story
Now for the first time the public will have an opportunity to know what went on inside the project with the publication of The Tejas Story, by Air Marshal Philip Rajkumar (Retd) who worked in the project for nine years from 1994 to 2003. He was in charge of the flight test programme which is a crucial phase in the development of any aircraft. His first person account written from that perspective is an absorbing read.
Go learn LCA's proper history. I haven't read it and even I know LCA's history.

If ADA is criticized for death of Mig-21 pilots then IAF will also criticized for foot dribbling M-MRCA which had its fare share in the death of pilots.
GoI delayed MRCA, not IAF. IAF needs MoD clearance don't you know? If they were asking for clearance since 1999, then IAF isn't at fault.

GoI delayed MRCA a second time by withdrawing the first RFP. Not IAF. Learn history properly.

Don't weave fairy tales here.

Quote Country should have never let experience gained through HF-24 project go wasted, no matter what, work should have continued. Unfortunately after HF-24, neither Government nor IAF showed any interest in perusing expertize in the domain of at least power plant let alone in any new proposal for follow on fighter projects. Least could IAF have done was to ask DRDO and Gov for starting serious work ( in the form of TD) on various critical technological fronts like development of Turbofan tech, Airborne fighter class MMR, INS, futuristic airframe materials etc. unquote
You don't understand, it is the design bureau to provide the right technologies and chart out a development path, not IAF's job. GoI did setup all the industries and provided money to both HAL and GTRE in engine development. We did not have any good scientists at the time who could get the job done.

Don't mix IAF's work with DRDO's. You are the one who don't understand.

When USN issued a RFI to Boeing for a 6th gen fighter, the Admiral said they don't know what Boeing can provide for them and they are only looking for information. Based on the information the USN will make a RFP. That's how it works the world over. USN, IAF etc are not expected to know everything. Boeing, DRDO etc is supposed to.

PM referred to 1991, many economist saying presently we are passing through 1991 like situation. Our credit being junked, PM (the Economist and supposed hero of 1991) being referred to as useless and it's only my opinion! Wow!
You are comparing a Pakistan like situation to India's economic problems which is nowhere related to the two situations. Earlier we did not have any money to pay off debt. Today we have so much money that Congress decided to spend a little more than they should have.

And another FYI, economy can be brought on track after selling entire country but population growth can't be checked so dynamically. And large population nullifies economic growth. So no, FM won't have enough money to buy and equip IAF with 1000 30 ton jet fighters by 2025 and beyond (as you predicted in earlier post) if population is not checked. And like I said earlier, population growth doesn't fluctuate as dynamically as economic growth figure.
Our population is fine. It is growing at a decent rate. Even a 6% growth would mean we will be as big as the US by 2025. Remember I talked about currency strengthening too.

You mean stretch form From Nalia to Twang is not large (long) enough? Wow"¦"¦"¦.May I again add two front war! BTW who's stopping PLAAF from entering through Nepalese and Bhutanese airspace? BTW need I mention some 2000 fighter strong enemy also?
I got this from an actual IAF guy. We have 3 bases there and will eventually 5-6 squadrons of MKIs in the region apart from Rafales. That's more than enough and that is supposedly a lot anyway. Even during Red Flag there are no more than 40 or 50 aircraft in a 20000sqKm area and that is in a highly controlled situation with proper RoEs.

LCA is small like very small, uses carbon composite by the highest percentage, Y shaped engine intake conceals much of engine blades, and tailless delta wing configuration gives it smaller span, include RAM as well. And saying "LCA has small RCS" is plain nonsense? Wow!
Yes it is nonsense because stealth needs to be designed into the aircraft. Low RCS on LCA is like saying a baby elephant weighs less than an adult elephant. When we talk about LCA's RCS it is 2 or 3 times bigger than Rafale. An aircraft which stands no chance against a F-22. LCA's RCS is 0.3m[SUP]2[/SUP] if we go by ADA's claims of it being 3 times smaller than a Mirage-2000. Dassault claims 10 times smaller than Mirage-2000 for Rafale. LM claims 1000 to 10000 times smaller for F-35 and F-22. Do you get the point? I have repeated this so many times on this thread that it is becoming meaningless repeating the same thing over and over.

LCA's RCS is fine if it was flying clean. Add weapons and you will see a flying truck.

It did not surprise me at all after to you posted a link talking about 1996. Huh 1996, the time when AWACS was nothing but airborne cousin of GCI. The time when it used to see airborne object as a dot over a circular CRT display marked with hard painted compass marking. Had radio beam projecting dish/plates under a swollen Roti shaped radome constantly on swivel (rotodome) with bullock-cart age revisit time. And when data transfer was just voice communication.
Even today's AWACS follow the same Physics laws. They did not change in time. AWACS are restricted by design because of the shape of the array.

Now since we are talking about AEW&C providing firing solution for Active BVRAAM shoot, let me start by asking, what information does an Active BVRAAM (which at least has one way date link) needs for its initial phase and midcourse guidance? Is it anything more than continuously updated 3D coordinates of its moving target? How about carrier aircraft receiving tracking information from AEW&C (which is tracking a particular target) and passing/relaying it to its missile in real time? Need i remind that almost all active BVRAAM are equipped with one way data link using which it continuously receives updated 3D coordinated about its target and corrects its flight path accordingly (in nano seconds) and continuously in order to reach to a point (in least possible time) where its own radar can lock on that particular target?
What is the full form of AEW&C. It is Airborne Early Warning and Control. Now can you tell me why an Early Warning system will provide actual combat specific information?

You posted links about AWACS giving tracking information. Of course AWACS can track. But the tracking information is not accurate. You tell me which will give a more accurate reading, a 30cm wave or a 3cm wave. Do the math.

Also there is such a thing called beamwidth. A radar like Bars has beamwidth values at 2-3degrees. A LCA radar will have a beamwidth of 5-6degrees. An AWACS has a beamwidth that is 1degree in azimuth and 8-9degrees in elevation. As an example, at 150Km a MKI can pick up a formation of 4 F-16s and identify each of them separately. A LCA will pick up a formation of 4 MKIs and assume it is just one MKI. An AWACS will pick up the formation of 4 MKIs at a larger distance and can identify the 4 aircraft individually, but the altitude information will be vague and vastly off from actual figures. So, you see the difference in accuracy between Bars, 2032 and Phalcon? That's how it works. Beyond that both 2032 and Bars work in X band while Phalcon works in the L band. So, the Phalcon will need the MKI or LCA to identify the aircraft at an acceptable distance and engage it. Here the MKI has the advantage because of the larger and more powerful system. The MKI will be able to identify targets from a much higher distance and can carry weapons that can engage aircraft at large distances.

As for E-2D detecting and tracking missiles. Missiles follow a very unique flight path and have a small RCS(same as LCA or Rafale). So, S or L band can pick up the missile at a large distance and cue(or provide mid course guidance) to interceptor missiles at long ranges. The final kill is made by the SAM's(like AEGIS's SM-3) using a very powerful active seeker at greater distances as compared to Active BVR missiles which require much more accurate information from X band arrays.

This is from fas.org for BMD systems,
Key Missile Defense Radar Planned for Remote Island
Without the X-band radar, any intercept would have to be based on much less specific information on a warhead's course, increasing the odds that a weapon of mass destruction might make it through the shield to a U.S. city, missile defense officials said.
Other radars will be available to guide interceptors if Shemya is taken out, but none of them can duplicate the X-band, officials said.
About AWACS providing mid course updates to missiles during BVR engagements. This is done for 3 major tactical reasons that I can thing of.
1. The missile was fired to keep the enemy fighters engaged. The less than accurate information from AWACS is enough to provide ground for a second BVR engagement for a better kill rate.

2. The fire control radar on the fighter was jammed.

3. The fighter disengaged from the engagement because the enemy fired his own missile while having a better advantage, so the fighter decided to back off. Instead of wasting the missile the AWACS provides mid course guidance at "less accurate information" where a kill is less than guaranteed which brings this scenario back to the point I made in 1.

12 LCA MK-2 operating from AFS 80-100 kms inside border intercepting intruding formation of 4 J-11 with equally capable BVRAAM, descent MMR and featuring smaller RCS and for most of time under guidance from AEW&C. Not to forget most important point, regardless of J-11 MMR's detection range they will be firing only at same range (maximum range of BVRAAM) as LCA's BVRAAM. Do the math.
J-11s would have picked up the LCA at 400Km... do the math.

There one time USAF F-16s went against IAF Mig-21s during a friendly duel and Mig-21 sneaked all way through without detection until they were at advantage position. USAF said F-16 MMRs were operating at retarded range. But it did never discount the fact that Mig-21's smaller size induced smaller RCS helped it happen. Now add to it carbon-composite airframe by highest percentage and where we are?
Cute attempt but F-16s have smaller RCS than Mig-21.

Exercises have RoEs which inhibit the superior aircraft's capabilities, in this case the F-16.

Original requirement for LCA MK-2 is 90 KN, and MK-1's engine can provide that much in Combat Thrust mode, doesn't that says all?
Original requirement also included am empty weight of 5.5 tons, not 6.5 tons.
Does it any matter? That's the question.

Anyway following is pic of PV-1 undergoing transformation to EW prototype. Interested people shall focus on spine.
Haha! Ok.

Considering disadvantage PAF has over IAF it is not out of world thought to say PAF might be working to get such capability (talking about AEW&C passing on firing solutions to linked up fighters). And from what I know Pakistanis are already in process of networking their sensors.
They can take inaccurate shots or defy physics by claiming X band capability for AEWCs. Their choice.

Plenty many rumors and news quoting unnamed sources. May be true may be not. USAF is still going along with its plan to have F-35A as its backbone for future and they are not idiot bunch.
They still have a network advantage.

USN isn't happy with the F-35. They reduced order numbers from 700 to 400 to replace F-18s, not SHs. SH is set to be replaced by a new 6th gen fighter from 2030 onwards. F-35 was deemed inferior to their needs.

BTW hard to believe that SU-35 which exposes its turbine blades (frontal assets as much as it will ashame Mallika Sehrawat) actually holds upper hand to a fighter which conceals its blades like a Ghunghat Clad cultured lady!
Try massive AEWC equivalent radar advantage along with massive kinematic advantage.

And what other advantage apart from more radar power and relatively higher volume of fuel and load weapon SU-35 has over F-35? Does SU-35 carriers weapons which can engage F-35 before its APG-81 and 120D can engage SU-35?

Try a 200-400Km AWACS killing weapon to boot,
 

Twinblade

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Seems like Israel has removed the restrictions on export of airborne AESA radars to India :)

AESA radars are considered the most advanced radars for jet fighters, and they improve the aircraft's ability to detect aerial targets. In the past, the Ministry of Defense has prevented Elta from offering the new radar for export, but this was changed since several manufacturers, including US manufacturers, are offering them around the world.
An Israeli Radar in India's Jet Fighter?
 

Defcon 1

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See there is no point in advertising your presence to enemy just for the sake of longer range tracking.In practice other than AWACS fighters will try to remain radio silent and try to rely as much on awacs and ew craft for targeting. Because stealth and surprise is more importanat for enemy fighter. for your information LCA wont be cheap.Other than range it is as costly or as sophisticated as any other fighter IAF will have.

MKI is more of a strike fighter,but LCA is mostly a point defence fighter that should have the least RCS possible and high agility in high altitudes himalayan region.It's lower RCS gives it an edge over any other single engined 4.5 gen fighter in the world, in the same way RAFALE's lower RCs gives it an edge over sukhoi.,The IAF gave an initial order of 40 only.Then they later added another 20.Havent you read any test pilot testimonials. They say it handles sharper than mirage. The IAF is spending 1.5 billion dollar just to upgrade the mirage,which will be inferior in comparision to TEJAs's LOW wing loading and high TWR.It is modular and upgradble as desired.Don't expect the russians to upgrade SUKHOI at material cost without charging for R&D from the tech of PAKFA.

ALso it will get ASEA radar , ring laser gyros and all electrical actuators in place of heavy hydraulic actuators and if possible the fly by light FCS and the most modern engine developed for AMCA in it's upgrade.Then it will be one of the unbeatable bird in sky.The sukhois and RAFALES wont get them with least cost or may not get them at all,because unlike ADA they will charge like hell for R&D.The mirage upgrades alone is equal to the cost of new fighter. ISRo and DRDO already have the ring laser gyro tech for their missiles and launch vehicles.All electrical actuators will make it lighter and nimbler.

In mk-III can be a 10 ton double engined version with excellent TWr and internal bomb bay for stealth.If you have any doubt please read "INDIA TODAY "article on LCA by "MANOHAR JOSHI"----"OUR CINDRELLA MUST STEP OUT"..IT HAS HUGE EXPORT POTENTIAL IN MK-II VERSION IF GTRE-SNECMA ENGINE ARRIVES IN A FEW YEARS FOR AMCA.Because once that engine is added it will have nil american content and will be hugely attractive for export customers free from the influence of AMERICANS.
Yeah yeah. Don't know where to begin.

1. Why do you always mix AWACS when I talk about LCA Radar? IAF will have only 15 AWACS by 2022. What if a LCA has to operate without AWACS cover. By bringing AWACS everywhere, you are only strengthening my claim that LCA's radar is below par.

2. MKI is a strike fighter??? Seriously?? Talk to a senior member and they will teach you what does a strike fighter actually means.

3. So lower RCS is the reason why Rafale was chosen over Sukhoi?? By this logic shouldn't we have chosen Gripen since its RCS was lowest among all aircrafts in MRCA. But it wasn't chosen was it. The point stands, as far as fourth gen aircrafts are considered, stealth is a non-issue.

4. The 20 that IAF added later are of MKII version, idiot.

5. IAF is spending 1.5 billion to upgrade Mirage not because it is God's gift to aviation, but simply because its airframe life is not yet over and we are short of new planes.

6. In rest of your post you have been dreaming about MKII and MKIII, without even thinking for a second that there is no guarantee if MKII will be inducted in time and IAF has not confirmed that it is interested in MKIII.

If you want to dream, thats fine by me. But don't spoil this thread because of that. And if you again post such stupid comments, I will simply stop replying to you as I have no intention of getting stuck into idiotic discussions.
 

ersakthivel

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P2PRADA says

Yes it is nonsense because stealth needs to be designed into the aircraft. Low RCS on LCA is like saying a baby elephant weighs less than an adult elephant. When we talk about LCA's RCS it is 2 or 3 times bigger than Rafale. An aircraft which stands no chance against a F-22. LCA's RCS is 0.3m2 if we go by ADA's claims of it being 3 times smaller than a Mirage-2000. Dassault claims 10 times smaller than Mirage-2000 for Rafale. LM claims 1000 to 10000 times smaller for F-35 and F-22. Do you get the point? I have repeated this so many times on this thread that it is becoming meaningless repeating the same thing over and over.
Where is the source for this claim that LCA's RCs is a third of mirages by ADA official?
How come you believe this single cail while debunking all other ADA cailms about LCA

P2 PRADA says

What is the full form of AEW&C. It is Airborne Early Warning and Control. Now can you tell me why an Early Warning system will provide actual combat specific information?

You posted links about AWACS giving tracking information. Of course AWACS can track. But the tracking information is not accurate. You tell me which will give a more accurate reading, a 30cm wave or a 3cm wave. Do the math.

Also there is such a thing called beamwidth. A radar like Bars has beamwidth values at 2-3degrees. A LCA radar will have a beamwidth of 5-6degrees. An AWACS has a beamwidth that is 1degree in azimuth and 8-9degrees in elevation. As an example, at 150Km a MKI can pick up a formation of 4 F-16s and identify each of them separately. A LCA will pick up a formation of 4 MKIs and assume it is just one MKI. An AWACS will pick up the formation of 4 MKIs at a larger distance and can identify the 4 aircraft individually, but the altitude information will be vague and vastly off from actual figures. So, you see the difference in accuracy between Bars, 2032 and Phalcon? That's how it works. Beyond that both 2032 and Bars work in X band while Phalcon works in the L band. So, the Phalcon will need the MKI or LCA to identify the aircraft at an acceptable distance and engage it. Here the MKI has the advantage because of the larger and more powerful system. The MKI will be able to identify targets from a much higher distance and can carry weapons that can engage aircraft at large distances.

As for E-2D detecting and tracking missiles. Missiles follow a very unique flight path and have a small RCS(same as LCA or Rafale). So, S or L band can pick up the missile at a large distance and cue(or provide mid course guidance) to interceptor missiles at long ranges. The final kill is made by the SAM's(like AEGIS's SM-3) using a very powerful active seeker at greater distances as compared to Active BVR missiles which require much more accurate information from X band arrays.

This is from fas.org for BMD systems,
Key Missile Defense Radar Planned for Remote Island
The awacs fly 150 km behind the LCA group.The LCA goup fly with their own dedicated EW support craft (or one sukhoi)along with them.No enemy formation can not dodge both the ew craft of LCA fighting group and AWACS at the same time however may be the formation flying tactics.Because the ew craft and AWACS are at different locations.


So once the awacs gives general direction

(according to latest L band or x band asea on AWACS it would be much more accurate, as rafale pilot claims that they can release 6 of their missiles simultaneously with out using the radar, front and behind of the ,exclusively relying on data link from awacs. But let us not include them in this discussion , because you have outlawed it)

the ew craft flying along with 10 or 12LCA fighters will acquire exactly all the co ordinates of each single fighter in enemy formation and appropriate number of BVRs will be fired on J-10 or J-11 group or whichever fighters.


(For this purpose the first pv is being modified for ew role as rahul singh posted in his previous post quoting AJAI SHUKLA's "BROAD SWORD" blog.So LCA wont even need your SUKHOI darlings for the purpose. But since according your high standards you are going to believe only the racially motivated stuff spewn out by AUSTIN of FLIGHT GLOBAL I am not stressing that either. I have not included stealth tracking UCAVs flying infront of LCA group in this discussion since you are paranoid to the very idea)

That's how LCA will fire 200 or 300 km BVRs without their own radar.

The BVRs can rely on the datalink with LCA which fired them or AWACS which guides them , or ew craft flying with them to reach their best position witin 18 km of the target.

You once famously said in this same thread that AMRAAM has a very very very "POWER FULL ACTIVE MONOPULSE SEEKERS" that will make mincemeat of any target fired from 18 km range.So its enough if the awacs and ew craft can give guidence till this 18 km distance from the enemy fighter. You can safely concede that they may be up to the mark for this role at least.

( despite me arguing repeatedly that according to Dr.CARLO KOPP these monopulse seekers are history compared to new DFRM equiped monopulse jammer in the modern fighter aircraft, and the same CARLO KOPP says however accenuated the punny missile antena may be the new L band jammers in development will jam all LINK 16 within its vicinity So according to YOU these fancy 200 kms BVRS should kill their target come hell or high water, I am not gonna argue any more against that.Hell with RAND study which says " All these fancy kill ratios from 200 kms for BVR are all against non MAW equipped, non evasive taking,non jammer equiped, "FLYING STRAIGHT ON' like dumb duck targets.Since these guys have zero credibility compared to your and austin's gospel of truth Who am I to argue.)

So the fate of 10 or 20 enemy fighters flying 150 km away are sealed perhaps all according to your quotes in this post..
 
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ersakthivel

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Yeah yeah. Don't know where to begin.

1. Why do you always mix AWACS when I talk about LCA Radar? IAF will have only 15 AWACS by 2022. What if a LCA has to operate without AWACS cover. By bringing AWACS everywhere, you are only strengthening my claim that LCA's radar is below par.

Why I keep doing this is that LCA will always fly with supporting Ew craft and AWACS in fighting group of 20 or 30 fighters in point defence role ,it wont be going deep into china alone. If not then for what purpose has IAF ordered upto 12 AWACS? SO the smaller size of LCA radar wont hamper it in point defence roles,which is the primary job of LCA. The F-35 is gonna do the same.The F-22 is gonna do the same. Then what prevents LCA from ding the same. It is not the spitfire vs LUFTWAFE in world war II days. It is the network centric ew enabled warfare of tomorrow.
2. MKI is a strike fighter??? Seriously?? Talk to a senior member and they will teach you what does a strike fighter actually means.

Then what will be the role of MIG-35 in Russian airforce? What is the name of the fighter which gets mated with 300 km range nealy 1 ton weight BRAHMOS missile? I dont demean it's air to air capability. But it is the biggest load carrying fighter in the IAF. So wont they be used primarily for strike roles in IAF?I am glad if you correct me.
3. So lower RCS is the reason why Rafale was chosen over Sukhoi?? By this logic shouldn't we have chosen Gripen since its RCS was lowest among all aircrafts in MRCA. But it wasn't chosen was it. The point stands, as far as fourth gen aircrafts are considered, stealth is a non-issue.

How do you know that grippen has the lowest RCS? The GRIPPEN link which was posted by TWINBLADE says that it has an RCS of 0,1 and not 0.1 (as RAFALE claims).Since grippen NG is not gonna offer anything substantially more than LCA mk-II from the start it stood no chance according to all senior experts on the MMRCA competition.
4. The 20 that IAF added later are of MKII version, idiot.

REALLY??????????? then your highness can go to this links and check for yourself.
Indian Aviation News
IAF ordered 40 Tejas Mk-I aircraft: Antony - Economic Times
You can use uncle google before posting some stuff like this.

5. IAF is spending 1.5 billion to upgrade Mirage not because it is God's gift to aviation, but simply because its airframe life is not yet over and we are short of new planes.

When will it's airframe life over? Do you genius still believe that extending the residual airframe life worth as much as new fighter cost???????
6. In rest of your post you have been dreaming about MKII and MKIII, without even thinking for a second that there is no guarantee if MKII will be inducted in time and IAF has not confirmed that it is interested in MKIII.

No one needs IAFs interest to induct LCA.There are enough sane people in MOD and GOi who wont show much interest in running foriegn manufaturer's gravy train,like many people wish.Mind your language first if you want to get respect as senior member.


If you want to dream, thats fine by me. But don't spoil this thread because of that. And if you again post such stupid comments, I will simply stop replying to you as I have no intention of getting stuck into idiotic discussions.

Not much will be lost to aviation history if we both stop discussing the topic,I suppose.You do some googling and post some relevant stuff. Then it will enrich this thread.I won't venture out regarding 'who is making this thread idiotic?"

There are many people who support the induction of many foreign platforms in IAF against LCA .They can all argue their case with some modesty perhaps,however senior they might be.
Thanks.
 
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Defcon 1

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There are many people who support the induction of many foreign platforms in IAF against LCA .They can all argue their case with some modesty perhaps,however senior they might be.
Thanks.
First of all I never claimed any seniority over you. All I am saying is that I am not stupid.

1. How do you know that LCA will always accompanied by AWACS?? we will have 15 AWACS in 2022 and they will be shared among 6 LCA squadrons, 7 Rafale Squadrons, 3 Mig 29 sqdrns and 2 Mirage sqdrns. So, either prove that IAF has specific doctrine of sending LCA with AWACS only or get lost.

2. Look man I don't want to correct you about the strike fighter issue. Every knows MKI is a fighter bomber. You saying otherwise won't change that. If you start calling an elephant a lion, it doesn't become a lion.

3. For RCS of Gripen, http://www.f-16.net/f-16_forum_viewtopic-t-1029-postdays-0-postorder-asc-start-30.html

By the way, Do you have proof that LCA's RCS will be as low as you claim it to be.

4. About the Mirage upgrade. Ok then please tell me what was the other option that airforce had other than upgrading its mirages regardless of the cost.

5. How do you that IAF's consent is not required for inducting LCA?? Proof?? Oh wait, you never come with proof, you only come with fantasies. MKIII will only be inducted if IAF needs it, not because DRDO wants to have something to show for 29 years of work.
 

ersakthivel

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Are you spokesperson for ADA or HAL ? Because you are behaving so....



Whom are you fooling ? LCA mk2 will be powered by GE 414 which have maximum thrust 98KN, but F 16 is powered by P&W F110 which have >120KN.

So the same 120KN is not available to LCAmk2 . Don't try to fool us !
So you are sure that LCA mk-II will have only 98 kn.
Do you know that ADA site gives 92 kn for MK-I's engine,how come mk-II can support 5 ton weapon load,increased fuel load?
SO do you think it will be worse than MK-I?
Are you so sure that EPE hasn't finished development?
Are you so sure that INDIA which buys apaches,C-17 globe masters and maritimepetrol crafts and guns from US will only get a 20 year old engine?
Won't EPE fit on LCA?
If it fits then wont GOI pull a few strings and get it for LCA?
 

ersakthivel

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Seems like Israel has removed the restrictions on export of airborne AESA radars to India :)



An Israeli Radar in India's Jet Fighter?
At high-subsonic flight speeds, supersonic airflow can develop in areas where the flow accelerates around the aircraft body and wings. The resulting shock waves formed at these points of supersonic flow can bleed away a considerable amount of power, which is experienced by the aircraft as a sudden and very powerful form of drag, called wave drag.

To reduce the number and power of these shock waves, an aerodynamic shape should change in cross sectional area as smoothly as possible. This leads to a "perfect" aerodynamic shape known as the Sears–Haack body, roughly shaped like a cigar but pointed at both ends.
The area rule says that an airplane designed with the same cross-sectional area distribution in the longitudinal direction as the Sears-Haack body generates the same wave drag as this body, largely independent of the actual shape.


As a result, aircraft have to be carefully arranged so that large volumes like wings are positioned at the widest area of the equivalent Sears-Haack body, and that the cockpit, tailplane, intakes and other "bumps" are spread out along the fuselage and/or that the rest of the fuselage along these "bumps" is correspondingly thinned.

The area rule also holds true at speeds higher than the speed of sound, but in this case the body arrangement is in respect to the Mach line for the design speed. For instance, at Mach 1.3 the angle of the Mach cone formed off the body of the aircraft will be at about μ = arcsin(1/M) = 50.3° (μ is the angle of the Mach cone, or simply Mach angle). In this case the "perfect shape" is biased rearward, which is why aircraft designed for high speed cruise tend to be arranged with the wings at the rear. A classic example of such a design is Concorde.




Whitcomb realized that, for analytical purposes, an airplane could be reduced to a streamlined body of revolution, elongated as much as possible to mitigate abrupt discontinuities and, hence, equally abrupt drag rise.[6] The shocks could be seen using Schlieren photography, but the reason they were being created at speeds far below the speed of sound, sometimes as low as Mach 0.70, remained a mystery.


Several days later Whitcomb had a "Eureka" moment. The reason for the high drag was that the "pipes" of air were interfering with each other in three dimensions. One could not simply consider the air flowing over a 2D cross-section of the aircraft as others could in the past; now they also had to consider the air to the "sides" of the aircraft which would also interact with these streampipes.

Whitcomb realized that the Sears-Haack shaping had to apply to the aircraft as a whole, rather than just to the fuselage. That meant that the extra cross-sectional area of the wings and tail had to be accounted for in the overall shaping, and that the fuselage should actually be narrowed where the wing meets the fuselage meet to more closely match the ideal.
Applications

If you look at the under side of LCA you can actually notice that fuselage of LCA TEJAS follows this rule.The fuselage expands smoothly from the nose cone and from a point near the wing root it starts to narrow down to the tail.

http://www.drdo.gov.in/drdo/pub/dss/.../2-CEMILAC.pdf

What CEMILAC report by S.K.JEBAKUMAR states is that there is a sudden increase in cross section from x=5000 mm to x=6000 mm.It says this increase in cross section should be more smoother for further wave reduction.

This sudden incaaese may be due to the strengthening of the wing at the roots to increase the external stores capacity of LCA TEJAS.

So if we add a nose cone plug and extend the fuselage by 1 meter the shape confirmation according to WHITCOMB's area rule will be much smoother like the classic coke bottle shape.It will further reduce some drag.It will also result in the increase in internal volume for fuel and more space for avionics so it would be overall more beneficial to TEJAS.

SO area rule is followed in the design of LCA. But due to the strengthening of wing roots there was sudden raise in cross sectional are at x=5000mm to x=6000 mm.This raise is in conformity with the WHIT COMB's rule which dictates that the cross sectional are raise should continue till the pointin fuselage where the wing meets the fuselage.But instead of being gradual it is sudden raise in cross sectional are at x=5000mm to x=6000 mm that needs to be addressed.

During the planning days of LCA ,it was meant to be a mig replacement weighing 5.5 tons carrying mig like loads of 2 tons,but providing performance better than mirage modeled roughly in the flying charecteristics of delta FCS mirage.It was achieved.Then with the advent of close to 200 kg modern BVRs ,naturally the weapons load is increased to 4 tons,because these BVRs weigh close to 150 kg each.


For that wing and the meeting point of wing with fuselage needed to be strenghtened resulting in the sudden raise in cross section instead of gradual raise as it is too late to alter the entire fuselage length at an advanced stage of the program as it would delay it further.SO once all the important testing parameters are achieved this change in nose cone plug and fuselage cross section smoothening can be easily validated later as it will only increase the aerodynamics not reduce it in anyway.

SINCE ACCORDING TO THE INTERVIE WITH KOTA HARINARAYANA IN ADA WEBSITE,
THE TEJAS FCS WAS TESTED ON AN F-16 FIRST AND THEN ONLY IT WAS IMPLEMENTED ON LCA TEJAS.

So changing FCS to accomadate this CEMILAC recommendations wont be a problem.

So it seems that FCS is modular platform independant software implementation that can be suitably adapted to F-16 and LCA.

So there may not be much problem on that count.



http://www.drdo.gov.in/drdo/pub/dss/.../2-CEMILAC.pdf

One of the major out come of sea level trial of Tejas
is that the drag of the aircraft is high such that the aircraft
could not reach the supersonic Mach number at sea level.
The components contributing for the maximum drag rise
has been identified and improvement methods were worked
out.
Nose cone extension using a Plug: The major component
of drag at higher speed is the wave drag. This can be
minimized by following the Whitcomb's Area rule for the
aerodynamic configuration design. The cross sectional area
variation of LCA along the length of fuselage is shown
in Fig 12. Between station X = 5000mm & 6000mm there
is a sudden increase in area. By smoothing this sudden
rise, the wave drag can be minimized. A possible solution
proposed is the extension of nose cone by introducing a
Plug. The detailed analysis of this design and its implementation
plan is being worked out.

d

THE CEMILAC REPORT SAYS EXPLICITLY THAT TEJAS "FAILS TO ACHIEVE SUPESONIC MACH number (specified for it)".

IT DOESNOT SAY THAT TEJAS FAILS TO GO SUPERSONIC IN AT SEA LEVEL.

IT JUST SAYS IT IS FALLINHG SHORT OF IT'S INTENDED SUPERSONIC MACH NUBERS.

THIS MAY BE DUE TO MANY OTHER FACTORS LIKE EXTRA WEIGHT BECAUSE OF INCREASED WEAPON LOAD REQUIREMENT.
The 92 kn new GE engine on MK-1 itself may solve this problem.

The smoothening of the cross section could have been done in LSP-7 itself as there are changes to tail as suggested by ADA.Because if the sudden raise from x=5000 to x=6000 is addressed in LSP-7 ,it wouldnot have been visible to the naked eye.Only cross sectional area map like the CEILMAC pdf alone can answer this.The nosecone plug will further make the compliance with WHITCOMB RULE in more strem lined and gradual manner .

CEMILAC report by S.K.JEBAKUMAR also states some area near the tail should be smoothened.The LSP-7 sports changes to tail section as reported in some blogs.So it may have been corrected.



Any replies Twinblade?
 
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