HAL Tejas | Updates, News & Discussions

[Gessler]

^^Vympel R-60M IR-guided WVRAAMs.

 

[sudhir007]

So they start testing

LCA-Tejas has completed 1944 Test Flights Successfully. (22-Nov-2012).


(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-238,PV5-36,LSP3-75,LSP4-56,LSP5-106,LSP7-5,NP1-4)

LCA-Tejas has completed 1941 Test Flights Successfully. (12-July-2012).


(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-237,PV5-36,LSP3-75,LSP4-56,LSP5-105,LSP7-4,NP1-4)

 

[Gessler]

So they start testing

LCA-Tejas has completed 1944 Test Flights Successfully. (22-Nov-2012).


(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-238,PV5-36,LSP3-75,LSP4-56,LSP5-106,LSP7-5,NP1-4)

LCA-Tejas has completed 1941 Test Flights Successfully. (12-July-2012).


(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-237,PV5-36,LSP3-75,LSP4-56,LSP5-105,LSP7-4,NP1-4)

what is this? only 3 flights in 4 months?

 

[Jason bourne]

^^Vympel R-60M IR-guided WVRAAMs.

///
can anyone provide original pic of tejas firing R-73

 

[sudhir007]

///
can anyone provide original pic of tejas firing R-73

 

[rockstarIN]

what is this? only 3 flights in 4 months?

There were a fuel leak problem encountered. I think they rectified the same in all the LSPs and now ready for flight.

 

[BlueDot_in_Space]

DEVELOPMENT & SUPPLY OF MOTORISED FUEL TRANSFER VALVE (MFTV)”For LIGHT COMBAT AIRCRAFT (LCA) –Programme, 11 Oct 2012

A better C.G management is planned for LCA Tejas by employing Active Fuel Proportioner using the motorized valves. The typical C.G travel is (˜3%) due to the fuel consumption in Tejas that makes it less unstable and so less maneuverable when the wing fuel tanks are empty. Currently, a passive fuel proportioner is being employed in Tejas to limit the maximum fuel travel within ±0.5%.

 

[arp2041]

LCA High AOA Testing Update

I understand the LCA will clear its high AOA testing using LSP 6 without fitment of a spin recovery chute.

LSP 6 has been rigged for high AOA testing and is yet to fly.

Fitment of a spin recovery chute would have put the program back considerably because of a need to accurately evaluate airflow changes caused by the fitment of a structure on top of the aircraft to house the spin recover chute, through computer simulations.

ADA has been advised by British Aerospace, its consultant, to instead resort to incremental testing with extensive monitoring and evaluation of airflow patterns around the aircraft every time the alpha is increased.

The aim is to fly it to 26 alpha, from the currently achieved 22 alpha, in several small steps, with a thorough analysis of airflow patterns after each incremental flight.

LCA High AOA Testing Update

 

[Gessler]

LCA High AOA Testing Update

I understand the LCA will clear its high AOA testing using LSP 6 without fitment of a spin recovery chute.

LSP 6 has been rigged for high AOA testing and is yet to fly.

Fitment of a spin recovery chute would have put the program back considerably because of a need to accurately evaluate airflow changes caused by the fitment of a structure on top of the aircraft to house the spin recover chute, through computer simulations.

ADA has been advised by British Aerospace, its consultant, to instead resort to incremental testing with extensive monitoring and evaluation of airflow patterns around the aircraft every time the alpha is increased.

The aim is to fly it to 26 alpha, from the currently achieved 22 alpha, in several small steps, with a thorough analysis of airflow patterns after each incremental flight.

LCA High AOA Testing Update

26 degrees AoA would be fine enough for a jet that carries Derby AAMs (that can pull 76Gs) and equipped
with HMDS for off-boresight target acquisition.

 

[arp2041]

26 degrees AoA would be fine enough for a jet that carries Derby AAMs (that can pull 76Gs) and equipped
with HMDS for off-boresight target acquisition.

Hey gessler, pls explain to me what exactly is AOA & it's use, if u can

thanks in advance

 

[rockstarIN]

Hey gessler, pls explain to me what exactly is AOA & it's use, if u can

thanks in advance

Angle of attack - Wikipedia, the free encyclopedia

The above will help.

 

[rockstarIN]

26 degrees AoA would be fine enough for a jet that carries Derby AAMs (that can pull 76Gs) and equipped
with HMDS for off-boresight target acquisition.

It will be an achievement if it is 26 without the help of chute. We can achieve higher when we fit new engine.

Actually out testing centre guys are so rigid that they even does not want a simple flaw. The US guys told during NLCA test that they allow test flights at much more extent.

 

[Abingdonboy]

It will be an achievement if it is 26 without the help of chute. We can achieve higher when we fit new engine.

Actually out testing centre guys are so rigid that they even does not want a simple flaw. The US guys told during NLCA test that they allow test flights at much more extent.

This overly cautious route was mandated by the MoD in the LCA's early days where a crash or major mishap would have been curtains for the LCA development project as a whole. As it stands any crash today would still be a mjor setback for the program and would add years to the deoyment process as the IAF and IN called for proof of the plane's safety. This is a contributing factor (not a huge one) to the LCA's relatively slow development pace. If you look at other projects that had 100% backing from their prospective buyers like the V-22 or F-22/35 the project developers feel more empowered to take a more aggressive development path that may end up in accidents or crashes.

 

[sancho]

This overly cautious route was mandated by the MoD in the LCA's early days where a crash or major mishap would have been curtains for the LCA development project as a whole. As it stands any crash today would still be a mjor setback for the program and would add years to the deoyment process as the IAF and IN called for proof of the plane's safety. This is a contributing factor (not a huge one) to the LCA's relatively slow development pace. If you look at other projects that had 100% backing from their prospective buyers like the V-22 or F-22/35 the project developers feel more empowered to take a more aggressive development path that may end up in accidents or crashes.

But you can't really compare LCA with them, neither as projects nor as aircrafts. Flying LCA is way simpler than flying a V22, not to mention that the V22 and F35 are technologically way more advanced. For the rather simple development of LCA, we do have too high limitations at it seems and that's why they want to clear everything before they will induct it.

 

[AADHAAR]

But you can't really compare LCA with them, neither as projects nor as aircrafts. Flying LCA is way simpler than flying a V22, not to mention that the V22 and F35 are technologically way more advanced. For the rather simple development of LCA, we do have too high limitations at it seems and that's why they want to clear everything before they will induct it.

Both J-10s and JF-17s have crashed.
But China / Pak don't have an option to cancel either of these programs.

If the J-10 / JF-17 type experience had happened in India, IAF and IN would have promptly cancelled both programs.

Like it or not, an LCA with 4 crashes by 2004, would have been essentially become a "historical attempt" by 2006.

Further, hit-and-try approach to development can be quicker (if you get lucky, once in a while) but otherwise costlier, in general.

We're not at war or otherwise undefended (Su30 MKIs dominate any other combat aircraft in action in Asia, as of now) ... that we try "guesswork" in design and hope to get lucky.

Rigourous theoretical design and ground testing is a wise decision.. IMO.

Hence, I completely agree with Abingdonboy.

That said, DRDO can use the LCA and Kaveri engine experience to cut down project timelines and budgetary allocations for future proejcts.