ADA Tejas (LCA) News and Discussions

[Kunal Biswas]

Tejas MMR is not EL/M-2032, It is based on EL/M-2032, Some one should correct the figures and content ..

Wait a minute...Wikipedia says " The EL/M-2032 radar used in LSP-3 has a detection and tracking range of up to 150 km in air-to-air mode, the air-to-ground mode generates high resolution radar imagery of locations at up to 150 km, and air-to-sea mode can detect and classify naval targets at ranges of up to 300 km."

So isnt Tejas's max detection range Air-Air about 150 kms?

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Are you here for only trolling and attention whoring ?

Oh i remember this thread where paki members exposed your lies and hence you blocked them

 

[Kunal Biswas]

INDIGENOUS ON-BOARD OXYGEN GENERATING SYSTEM (OBOGS) BASED INTEGRATED LIFE SUPPORT SYSTEM (ILSS) FOR TEJAS LIGHT COMBAT AIRCRAFT

ILSS-OBOGS an indigenous 'on-board oxygen generating system' (OBOGS) based 'integrated life support system' (ILSS) designed and developed to provide enhanced physiological protection to aircrew of high speed and high altitude fighter aircraft -Tejas with primary objective of meeting long endurance flights was today, the 29th December 2014, symbolically handed over by Dr.VC Padaki, Outstanding Scientist and Director, DEBEL (Defence Bio-medical and Electro-medical Laboratory) to Dr P S Subramaniam, DS, Program Director - Combat Aircrafts and Director Aeronautical Development Agency, in the presence of Dr K Tamil Mani, DS and DG Aeronautical Systems and Dr Manas K Mandal, DS & DG Life Sciences, directors of Bengaluru based laboratories and DRDO officials.

Congratulating the team Dr Avinash Chander, Scientific Advisor to Raksha Mantri, Secretary Deptt. of Def. R&D & DG DRDO lauded the achievement saying "a lifesaving system involving technological challenges, development of ILSS-OBOGS is a major achievement, expressing DRDO's commitment to deliver complex technologies for armed forces "

"Deliverability comes only if there is multi-disciplinarity", said Dr Mandal emphasizing the role of working together towards development of multi-disciplinary systems and stated, "Individuals do not make a team - the team makes an individual." Dr Tamil Mani, emphasizing the importance of synergy and lauded the dedicated work of the young team of scientists and said, "Technology breakthrough for OBOGS for future airborne platforms is now within our capability". Speaking on the occasion, Dr P S Subramaniam appreciated the role played by different stake-holders in the development of ILSS-OBOGS.


Designed to get integrated within the confined space available in the in the aircraft, the OBOGS replaces the Liquid Oxygen based system (LOX) by utilizing bleed air from the aircraft engine by separating oxygen from other components by a process based on Pressure Swing Adsorption (PSA) technology. Designed to provide breathing gas to aircrew continuously, the use of OBOGS technology offers advantage of unlimited endurance in the sky (unlike LOX system wherein endurance is limited by the storage capacity). In addition it also provides improved safety, reduced logistics and significantly lowered operational costs. Developed by DEBEL, a DRDO lab focused on development of bio-medical and electro-medical soldier support systems, the advanced ILSS- OBOGS addresses the need for preventing in-flight Hypoxia (during high altitude flying and emergency escape) and 'Gravity Induced Loss of Consciousness' (G-LOC) during high G manoeuvres.

The technology consists of On-Board Oxygen Generation System (OBOGS) that provides oxygen for breathing, a breathing regulator that supplies the breathing gas to the aircrew at desired flow and pressure, an Anti-G-Valve (AGV) that inflates the anti-G suit to apply desired counter pressure and an Electronic Controller Unit (ECU) to coordinate various functions. A dedicated solid state oxygen sensor to sense oxygen concentration in the breathing gas is an integral part of the system. In addition, many other sub-systems that provide back-up / redundancy and also impart life support during emergency escape are integral part of the ILSS-OBOGS that will now undergo ground fitment trials on Tejas, followed by flight trials. India will join the elite club of five countries who have established and mastered the technology in the field of ILSS for military flying once the trials are successfully completed. The ILSS-OBOGS has the versatility to be customized to the needs of other Indian fighter aircrafts like MIG-29, Sukhoi-30 Mk1 and Mirage-2000.

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From BR @vishnu

 

[ersakthivel]

From Saurav jha's blog quoting DRDO Aero DG Tamil Mani we can see that there is no logic behind so many false claims like ,

1. Tejas has smaller air intake,
2.Tejas can not reach higher AOA without canards,
3.tejas is below mig-21,

Mk-1 Achieved

1) As far as I am concerned the program really materialized in the mid-1990s and the air staff requirement (ASR) of 1995 that was agreed to by ADA at the time broadly set the ultimate performance objectives for the project. With reference to the 1995 ASR, the Mk-I has already exceeded the angle of attack (AoA) requirement of 24 degrees, by some two degrees (i.e it has achieved 26 degrees), which is highly commendable and comparable to the best that the Mirage 2000 could do. This could even be increased to 28 degrees in the future.

2) The Mk-I has also demonstrated +7G and has flown at a maximum Mach number of 1.6 at altitude.

Mk-2 Objectives

- Now while the Tejas Mk-I does boast many frontline technologies, its aerodynamic performance unfortunately cannot meet the 1995 ASR in its entirety.

- Truth be told the ASR agreed upon by ADA at the time would in any event have been difficult for the Mk-I to achieve in its current state with or without canards.

- This is perhaps a reason why only forty units of the Tejas Mk-I fighter version have been ordered till date by the IAF. An order for 16 units of the type trainer developed for the Mk-I are also expected from the IAF, with the definitive configuration for it taking to the air last month in the form of PV-6.

- To address the IAF's 1995 ASR fully, work is now underway on the Tejas Mk-II which will sport a new and more powerful engine in the form of General Electric's (GE's) 98 kilo newton generating F414-GE-INS6 , 99 units of which have already been ordered. The F414-GE-INS6 replaces the current MK-I engine which is the F404-GE-IN20.

- Contrary to earlier speculation, Dr Tamilmani says that the Tejas Mk-II does not require an intake re-design since the MK-I intake was in any case intended to be used with the Kaveri engine which has a greater mass flow than the current F404-GE-IN20 . Studies have shown that the existing intake can easily handle the additional mass flow from the F414-GE-INS6.

- Together with the IAF, ADA has also introduced what Dr Tamilmani terms a 'weight reduction approach' and as per him some 350 kgs have already been shaved off the Mk-II design with a reduction of 500 kgs being the ultimate goal vis a vis the baseline Mk-I design.

- The Mk-II design is also expected to achieve a 5 percent improvement in drag characteristics through 'production improvements' related to further streamlining (reduced contour variations etc) of the Mk-I airframe.

- All these changes are expected to increase the aerodynamic performance of the Tejas design sufficiently to be very close to meeting all ASR parameters according to Dr Tamilmani.

- The IAF is fully cognizant of this and is now fully integrated with the LCA program. 'The IAF has positioned 23 officers to support our program', says Dr Tamilmani. 'They also have 30 airmen on the tarmac to prepare the aircraft', he adds.

- The Mk-II design will specifically address the sustained turn rate (STR), climb rate and transonic acceleration shortfalls of the Mk-I.

- The ASR requires a STR of 18 degrees (same as the F-16's) and Mk-II will close in on that.

- The climb rate will also be more or less satisfactorily reached.

- Transonic acceleration is expected to be realized fully.

- Moreover the Mk-II airframe will certainly be able to reach and fly through Mach 1.8 in a dive.

SO without canards tejas mk2 will have the STR of F-16 and it already matches exceeds the TWR ,AOA and ITR of mirage-2000 even in AOA.

And unlike Griepn E whose empty weight increased from 6.8 tons n C to 8 plus tons in E version(due to addition of newer fairings for extra fuel and shifting of landing gear) tejas mk2 is targeting a weight reduction , not increase. We will see what will be the empty weight once prototype flies. So tejas mk2 will have one of the highest TWR in IAF fleet and will match most of the modern 4.5th gen fighters in TWR-Wing loading combo, if the empty weight reduction target is achieved.

 

[ersakthivel]

This is the article by Khokar on tejas,

http://www.vayuaerospace.in/images1/Selected_pdf/IndiasLCATejasupdate.pdf

Even though the article mentions smaller air intake as problem , the statements from tamil MAni DRDO aer DG indicates that the present tejas mk1 air inlet is good enough, this is being said after more than 2800 test flights . SO no reason to doubt this claim, especially the desired AOA is achieved and the eair inlet is not starving the engine in even 26-28 deg AOA.


he says most of the stuff like STR, ITR are dependent on AOA. When the article was written it has reached an AOA of 24 deg only. Now it has crossed 26 deg and will reach 28 deg in FOC.

It is common knowledge that highest possible lift quotient CL max is reached at higher AOAs. This characteristic has nothing to do with canards. canards or compound delta helps the fighter to reach the peak AOA. Once peak AOA is reached then most important thing is max lift available. It is directly proportional to wing are at that AOA. Tejas has the highest wing area per Kg weight for any fighter aircraft(low wing loading). SO it should be able to get much better lift per Kg than most of the IAF fighters at this higher AOA. canards generate vortex that increases lift in high AOA by delaying flow separation.

In the same way compound delta of tejas generates vortices which does the same job increasing lift by delaying flow separation. SO beyond this point whether the fighter has canards or not is of no consequence. G on set rate is another important criteria which determines how fast this high AOA is achieved. From F-16 XL advantage over F-16 it is easy to understand that cranked or compound deltas have high G onset rates (the difference is close to 40 percent) which means faster ITR s and ability to reach fly by wire limited high AOA much faster than high wing loading , low wing area fighters.

It is this crucial factor which determines how the fighter pulls away from high G turning BVR missiles and maneuvers to point its nose at the enemy fighter to get the first shot whether with guns or missiles.This is why nowadays more than plain STR and ITR specs what is emphasized is dynamic maneuvering in modern combat.

 

[ersakthivel]

DRDO readies on-flight oxygen generator for Tejas | idrw.org

OBOGS under testing.

 

[rahulrds1]

[ Full 1080p HD ]

https://www.youtube.com/watch?v=dB73FdERNBA

 

[Kharavela]

MMRCA Rafale acquisition dream in storm again, Raksha Mantri Parrikar says Su-30 is adequate for IAF.

IMHO, this is indirectly good news for Tejas. I hope, Rafale deal will eventually get cancelled.

http://wap.business-standard.com/ar...n-make-do-with-sukhoi-30s-114123100706_1.html

 

[Lone Ranger]

MMRCA Rafale acquisition dream in storm again, Raksha Mantri Parrikar says Su-30 is adequate for IAF.

IMHO, this is indirectly good news for Tejas. I hope, Rafale deal will eventually get cancelled.

Business Standard Article Details Page

This is bad news for nations defense , rafale is more potent than mki

 

[Kharavela]

This is bad news for nations defense , rafale is more potent than mki

By your logic, Su-30 MKI is more potent than Rafale & IAF is getting 15 units every year. Then what is the need of paying 20-30 billion USD for Rafale ??

Question is self-reliance, not anything else. France itself has chosen obsolete fighter for its Navy rather than importing from USA / UK (ref: Naval LCA thread).

 

[Kunal Biswas]

Lets keep this Tejas thread ..

IMHO, this is indirectly good news for Tejas. I hope, Rafale deal will eventually get cancelled.

Question is self-reliance, not anything else. France itself has chosen obsolete fighter for its Navy rather than importing from USA / UK (ref: Naval LCA thread).

 

[Kunal Biswas]

]India Successfully Tests One Ton Glide Bomb

NEW DELHI: India today tested a one ton indigenously-developed glide bomb which successfully hit a target 100 kms away.The precision-guided bomb, tested in the Bay of Bengal off the coast of Odisha, was dropped by an Indian Air Force aircraft.The bomb, guided by its on board navigation system, glided for nearly 100 km before hitting the target with "great precision," said the Defence Research and Development Organisation (DRDO), which constructed it.Several radars tracked the flight of the bomb which was developed by multiple centres linked to DRDO.According to Dr G Satheesh Reddy, the Director of the DRDO's Research Centre Imarat Laboratory which was the nodal agency in developing the glide bomb, "India has now become self-reliant in the area of guided precision bombs."

Unlike missiles, glide bombs have no onboard motor and are therefore far cheaper to build and maintain than missiles. Glide bombs rely on small control surfaces which direct the weapon towards a target as it progressively loses altitude after being released from an aircraft. The key to a precision guided bomb is its seeker which can lock onto a target based on pre-programmed targeting data. The seeker itself can be optica l, infrared or a combination of the two and telemetry for the bomb can also be provided from overhead satellites.

With a range of 100 kms, the Indian-built glide bomb can be fired on ground targets which are beyond the range of most surface-to-air missile systems in use in Pakistan and China. In other words, the pilot of the fighter dropping the bomb can drop the weapon and escape before entering the range of the radars of enemy surface-to-air missiles which can shoot it down.

India Successfully Tests One Ton Glide Bomb. Why That's Important

 

[rahulrds1]

what is glide bomb??
How it works??
How it is used with "fighter planes" and navigated??

https://www.youtube.com/watch?v=xrT2KtSzMd0

 

[Kunal Biswas]

Astra BVRAAM Successfully for a 3rd time

India's Defence Research and Development Organisation (DRDO) has tested the indigenous Astra Beyond visual Range Air-ro-Air Missile (BVRAAM) for a third time successfully from an Indian Air Force (IAF) Su-30 MKI aircraft. Astra would be fitted on both the Su 30 MKIs and Light Combat aircraft (LCA) variants that DRDO and HAL are developing for IAF and the Indian Navy.According to the statement: The latest test was conducted on 20th Jun 2014 from over 6 km altitude. It was a control and guidance flight which successfully demonstrated interception of an electronically simulated target at long range. Both tests, today's test and earlier launch on 09th June 2014 conducted to demonstrate the aerodynamic characteristics of the missile, have demonstrated the repeatability, robustness and endurance capability of Astra BVR-AAM as a weapon system.

The range of the missile was not disclosed.

Source : ..:: India Strategic ::. IAF: India tests Astra BVRAAM Successfully for a 3rd time

 

[cannonfodder]

Very good news for Tejas. IAF will be forced to invest and support in Tejas; though foreign import lobby would be very hard at work to not let this happen.

If we put same money in LCA MK2 may we can get it done faster and also improve MK 1 in terms of internal components.
This is our first aircraft fighter; we should support it. It may be true that MK 1 may have its own limitations now; but we can surely improve it and make it better.
LAC MK2 will surely be much better as I have read on this forum about its technical specs(and same Arjun MK2 story).

MMRCA Rafale acquisition dream in storm again, Raksha Mantri Parrikar says Su-30 is adequate for IAF.

IMHO, this is indirectly good news for Tejas. I hope, Rafale deal will eventually get cancelled.

 

[cannonfodder]

One question for forum, RD 93 vs GE 404/ 414; I hear RD 93 can provide thrust upto 98 kN whereas GE 404 is 85 kN only GE 414 is 98kN which will be used for MK 2 version.

Can anyone explain the logic to use GE 404 for Mk1 pros/cons etc? Sorry if this was answered before.

Thanks in advance for reply

 

[ladder]

One question for forum, RD 93 vs GE 404/ 414; I hear RD 93 can provide thrust upto 98 kN whereas GE 404 is 85 kN only GE 414 is 98kN which will be used for MK 2 version.

Can anyone explain the logic to use GE 404 for Mk1 pros/cons etc? Sorry if this was answered before.

Thanks in advance for reply

2 points. ( technical discussion aside)

1. LCA was never designed to receive Russian engine. As we wanted to diversify.

2. Mig-29 uses RD-33 ( from which RD-93 is developed). So we know what that engine is capable of.

 

[biswaranjanrath.sipu]

Ge 414 is more technologically advance and reliable than RD 93 . apart from that RD 93 has a problem of mid air failure which may ground the already delayed tejas project . so ADE planned to play safe with reliable ge engine which according to me is a good choice even though it costlier than RD 93

 

[rahulrds1]

Tejas | Light Combat Aircraft | Inside Out [ total duration: 22:25 min]

https://www.youtube.com/watch?v=1IH5jQ_noaw

 

[rahulrds1]

 

[rahulrds1]