LCA TEJAS MK1 & MK1A: News and Discussion

[wraith96]

Finally, they’re waking up...twitterati did their job.

 

[HariPrasad-1]

Recently Bombardier sold its Q400 productiin line for 550 MN$, we were sleeping then....Will this be another missed opportunity?

We are always caught sleeping. Ours is a history of missed opportunities. Naheru let United Nation permanent membership go. Not only that but he supported China for that position. We are very large hearted people.

 

[HariPrasad-1]

Great Hope He Jump start Projects Like DRDO AEW&CS of C-295 UWB GAN AESA For AMCA


View attachment 46758

An active phased array radar composed of X-band TSA radiating elements


View attachment 46759

View attachment 46760

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Most advanced radars such as Uttam and EL/M-2052 have a much wider bandwidth (1-3GHz). A wideband radar using TSA radiating element may have a bandwidth no less than 5 GHz and an enhanced probability of detection+classification and it's much more difficult to jam. The associated wideband/multi-channel MMIC is however very complex and expensive. It is in an early development stage and the technology in question is futuristic. If this radar tech indeed goes to the AMCA, then the development period is perfectly aligned with the timeline of the aircraft being inducted into the IAF i.e beyond 2035.

Great Hope He Jump start Projects Like DRDO AEW&CS of C-295 UWB GAN AESA For AMCA


View attachment 46758

An active phased array radar composed of X-band TSA radiating elements


View attachment 46759

View attachment 46760

View attachment 46761

Most advanced radars such as Uttam and EL/M-2052 have a much wider bandwidth (1-3GHz). A wideband radar using TSA radiating element may have a bandwidth no less than 5 GHz and an enhanced probability of detection+classification and it's much more difficult to jam. The associated wideband/multi-channel MMIC is however very complex and expensive. It is in an early development stage and the technology in question is futuristic. If this radar tech indeed goes to the AMCA, then the development period is perfectly aligned with the timeline of the aircraft being inducted into the IAF i.e beyond 2035.

Well come Radhakrishnan sir. We hope that we shall see new heights in your leadership. Hope to see Utram and indian Awacs operational in his leadership.

 

[Karthi]

Finally, they’re waking up...twitterati did their job.

A golden opportunity can not be missed. Hope Modi ji will look into it.e everyone please tag Goi , civil aviation HAL etc in your Tweets , let them know , Do our part

 

[Assassin 2.0]

Finally, they’re waking up...twitterati did their job.

Can TATA or mota bhai wala reliance / priavte sector have funds to buy this company on their own??
If government is not goin to buy it.

 

[Karthi]

Can TATA or mota bhai wala reliance have funds to buy this company on their own??

We have 1 Billion population We can Donate 100 Rs so 100 Billion, may be enough , I am ready to give Upto 50000-75000A small contribution for our country

 

[wraith96]

Can TATA or mota bhai wala reliance have funds to buy this company on their own??
If government is not goin to buy it.

Personally i would like L&T to get the stake,they have been proving again and again...and with their track record of delievering the product before contractual schedule whether it be Naval ships or K9 vajra guns.

 

[Assassin 2.0]

 

[wraith96]

A golden opportunity can not be missed. Hope Modi ji will look into it.e everyone please tag Goi , civil aviation HAL etc in your Tweets , let them know , Do our part

been tweeting and tagging ministers since morning to wake these fkers up...

 

[janme]

But why the government should do it?, Are the private Industries sleeping?

 

[samsaptaka]

But why the government should do it?, Are the private Industries sleeping?

Because MoD treats pvt industry like shit. Doesn’t pay in time and places piecemeal orders. Our forces also prefer imports rather than working together with the industry (LCA took off only after parrikar and HAL test pilot forced IAF to settle for what was built and improve it together).

 

[shuvo@y2k10]

May be Kalyani group can pitch in. Baba Kalyani had done it in the past with the artillery production line.

 

[arkos]

Because MoD treats pvt industry like shit. Doesn’t pay in time and places piecemeal orders.

Lol, this deal is more lucrative for private firms than government. MoD doesn't really stand to gain from it unless they want to start building commercial planes.

 

[Karthi]

RAFAEL’s BNET-AR SDR-based Tactical Data-Link which will be used in Tejas MK1A . HAL SDR is available since 2010 but IAF never installed this advanced feature to any of its Aircraft

 

[Karthi]

HAL L Band Tactical Data Link

 

[rohit b3]

Many of the Gripen fanboys says "Gripen has superior data link" , after looking at those marketing videos.
However can someone explain me how its superior? Dont all modern fighters in a Network centric airforce have tactical Air to Air and Air to Ground Data links?

 

[Aaj ka hero]

Lol, this deal is more lucrative for private firms than government. MoD doesn't really stand to gain from it unless they want to start building commercial planes.

Really dude MOD is not alien, if country gets jobs as well as foreign reserves, it is MOD who will get a budget jump.
This na, thinking of shell is harmful for us.
Every deal done by anyone for the benefit of nation is helpful to each and everyone.
Yes, including you and me.
How is it? I tell you to search yourself.

 

[rone]

Many of the Gripen fanboys says "Gripen has superior data link" , after looking at those marketing videos.
However can someone explain me how its superior? Dont all modern fighters in a Network centric airforce have tactical Air to Air and Air to Ground Data links?

No it Dont have, it have link 16, standard NATO data link but has have some sort of sensor fusion and better situational awareness than LCA, LCA also have similar type data link al500a Indian counter part to link16, LCA mk1a and gripen e will be same in BVR becoz both have same network centric capability same kind of BVR ( meteor available for gripen also LCA have it optional with Indian aesa & DRDO sdfr ) only range payload aerodynamics differ from respective aircraft's, what IAF leaned from Feb 27th incident its all about BVR and counter BVR in modern day days of WVR are getting counted

 

[Bleh]

what IAF leaned from Feb 27th incident its all about BVR and counter BVR in modern day days of WVR are getting counted

Really!?.. Some would say BVR proved to be far less effective on field than in simulated exercises. Jamming, passive countermeasure, maneuvers are very much relevant against it.
Especially given the fact unlike IR guided CCMs, radar guided BVRs give alert from a long distance and within much of NEZ (60km max) the shooting aircraft remain vulnerable to IRST (40km range) locked passive missiles. As until terminal phase of the BVR if it tries to maneuver turning its radar away from the enemy aircraft the BVR will miss.

Anyways. Question:
Anyone here knows if Tejas FOC can take bombs (single/tandem whatever) in the central line?

 

[varun9509]

........................................

Some comments by Indranil Roy of BRF from the same video.

It is interesting to know that of all the 4th generation design Tejas has the highest static margin. Its mean time to double amplitude is less than 0.2 seconds. On the other hand. There are only 4 active surfaces for control (2 of which are overloaded as flaps)! So it was critical that the designers kept the vortices from moving too much. That is the reason of the double delta. All other benefits and disadvantages are of lower order of importance.

I absolutely loved your description of the wing. That's almost spot on.
1. One thing you did miss out is the inboard section actually has a significantly rounded LE which accentuates the effect that you mentioned keep the vortices stable. This has two effects. a. It gives great stability at supersonic speeds in the presence of sideslip. b. It gives great stability at high AoA and low speed. More on that later.
2. Another aspect of the wing is the LE slats. Mk1 has 3 of them (Mk2 will have 2). These slats actually deflect variable with downward deflection increasing from root to wing tip. This allows the nullify the variable AoA along the LE for a high sweep delta at high AoA. The end result is that the aircraft can fly at 28 degrees AoA (cleared for 26 degrees in squadron service) at 110 knots. It's minimum radius turn is completed at 330 mtrs!
4. You are right. The wing is highly optimized with a conical camber. It is a very good wing and retained in its entirety for Mk2.
5. When Mk1 began, Indian designers had nothing to stand on. What they took on was stupendous and they want to keep it simple. Canards were dropped for that reason. Today, when they have very firm grounds to stand on (similar to European designers in the 1980s) adding a canard is an incremental change.

On the intakes, there were many errors in reporting .
1. The original intake was designed for the Kaveri. But it was revised for the F404 including work on the lip and the area for the cross-section. They decided to stick to the circular intakes to decrease skin drag and improve pressure recovery. The design optimization was done in consultation with GE.
2. The auxiliary air intake is not because of the choice of the engine but an attribute of the fixed geometry. All 4th generation aircraft are designed for intakes optimized for high subsonic to transonic region. The auxiliary intake is to take care of the off-design point which is low speed. The auxiliary doors are spring loaded and open to let is more air when the speed is low. This is true for Rafale, GRipen, F-18, Jaguar etc. EF uses a moving lip. In the case of EF though, the lip movement is active.
3. The Mk2 (or what is now called the MWF) won't have a shock cone. None of the new designs use a variable -geometry inlet to reduce weight, complexity and RCS. This is because the focus of aerial wars has shifted. Nobody cares about top speed as much. 1.6M-1.8 M is enough. They want reduced cross section. The RCS of Tejas is really small thanks to its small size, low number of control surfaces and large use of composites. It is cleared for 1.6M. It is capable of 1.8M.
4. On the Mk2 however they have made changes to the intake. What is obvious is that the intakes are canted. This for reducing wave drag and RCS. The other thing that is not obvious in the following. In the Mk1, the wing leading edge shielded the intakes at supersonic speed. On Mk2 they elongated the intakes for best area ruling. This means that the intake is ahead of the leading edge of the wing! They modified the splitter plate to create the shock. ACtually, the splitter plate that is shown in the display models is not up to date.

You are right about the stubby nature of Tejas not being optimized for supersonic drag. I used to have a huge problem with the underside of the aircraft: Where's the wing-fuselage blending? It turns out that they did study blending but that would increase the area at the worst place increasing wave drag, and hence was dropped. The Mk2 overcomes this as you said by elongating the fuselage by 1.5 mtrs, by reshaping the area just behind the cockpit, refinements to the engine bay and something that you did not capture in your video, elongation of the intake by over 1 mtr, and canting the intake.