ADA Tejas (LCA) News and Discussions

[Defcon 1]

In my opinion shouldn't be given more attention than required, we don't have time to respond to everyone's criticism.

Meanwhile:

LCA-Tejas has completed 1949 Test Flights Successfully. (29-Nov-2012).
(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-238,PV5-36,LSP3-77,LSP4-56,LSP5-109,LSP7-5,NP1-4)

from

LCA-Tejas has completed 1947 Test Flights Successfully. (28-Nov-2012).
(TD1-233,TD2-305,PV1-242,PV2-222,PV3-348,LSP1-74,LSP2-238,PV5-36,LSP3-76,LSP4-56,LSP5-108,LSP7-5,NP1-4)

 

[navkapu]

Its successful i really like the IN they really get behind to get the best for themselves...... Its the right attitude have to say ....

 

[ersakthivel]

The most important test is spin recovery test.Only after the completion of this test the flight envelope can be opened to it's full potential 100 percent.And only after the test can LCA will conduct tests to check whether it achieves it's design AOA .

Because spin recovery test will test the near stall performance of the aircraft.
Since while pulling upper limit of AOA near stall conditions will be experienced ,
this validation of max AOA can go ahead only after checking how the aircarft recovers from and spin.

 

[Just Me]

"One of the comments of the test pilot from the Pentagon was that the F-16 flies better with LCA control laws" - AA Me, IN

"One of the comments of the test pilot from the Pentagon was that the F-16 flies better with LCA control laws"

from AA Me, IN
please delete if it is already posted

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What do they mean by LCA control laws?:shocked:

 

[Kunal Biswas]

Fly by wire software control laws..

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What do they mean by LCA control laws?:shocked:

 

[Decklander]

The most important test is spin recovery test.Only after the completion of this test the flight envelope can be opened to it's full potential 100 percent.And only after the test can LCA will conduct tests to check whether it achieves it's design AOA .

Because spin recovery test will test the near stall performance of the aircraft.
Since while pulling upper limit of AOA near stall conditions will be experienced ,
this validation of max AOA can go ahead only after checking how the aircarft recovers from and spin.

LCA if a FBW design so it is nearly impossible to spin this ac unless the FBW is switched off for spin excercise. A special spin recovery parachute has been designed for the spin test of this ac. LCA has a highly swept delta wing which has a rather flat stall curve which allows the ac to be flown even beyond stall AOA like MIG-21. But since LCA is FBW, it will not be possible to exceed the stall AOA. As far as the max AOA envelope is concerned, that can be tested even without spin test. Spin occurs as a result of stall. During spin the ac is stalled and the relative airflow is from below which give and AOA of nearly 30-40 degree and in case of a flat spin it can be as high as 65-75 degree.
The FBW system of LCA has been hailed to be better than that of not only F-16 but also of M2K by pilots.

 

[arunpat]

Guys, look at the spin Recovery chute test of f 35

F-35A Spin Recovery Chute Test | Military.com

 

[Decklander]

LCA is a tailless delta design and so its Rudders are blanked off by its wings in a spin. To recover from spin, it is very important to stop YAW, but with a shielded Rudder, it is not possible to recover LCA from spin by using just rudders. A spin chute gives a very strong pronounced nose down pitch to the ac which reduces its AOA and causes it to unstall. That allows the rudder to become effective and recover from spin.
But the spin behavior study and flight control laws to recover from it must be built into the FCS shud it happen in a very unusual situation. So LCA is now ready for Spin test and anyday you may hear the good news of the flight envelope being opened for full 9G turns.

 

[sukhish]

Fly by wire software control laws..

India's fly by wire is excellent.

 

[Kunal Biswas]

Voice Command Units For Pilots..

 

[Abhi9]

Voice Command Units For Pilots..

Thats a good development

 

[Armand2REP]

"One of the comments of the test pilot from the Pentagon was that the F-16 flies better with LCA control laws" - AA Me, IN

"One of the comments of the test pilot from the Pentagon was that the F-16 flies better with LCA control laws"

from AA Me, IN
please delete if it is already posted

How could he know until the software had been installed and tried?

 

[Tolaha]

How could he know until the software had been installed and tried?

F-16 was being used as a test-bed for LCA flight control software. So the software had to be installed on the F-16.

 

[Shaitan]

I will just leave this here..

Good post man.

Hopeful it will be remembered.

 

[Armand2REP]

F-16 was being used as a test-bed for LCA flight control software. So the software had to be installed on the F-16.

The article says it never happened due to sanctions, so how could it be?

 

[Decklander]

The article says it never happened due to sanctions, so how could it be?

LCA FBW was tested on F-16 in 1998 and than came Pokharan which ended this collaboration.

 

[uss]

The article says it never happened due to sanctions, so how could it be?

Armand here it is from the "Father of LCA Project" , Dr. Kota Harinarayana

"Wing Commander Kothiyal was our test pilot. He was a very professionally competent person. I know that he had never flown a prototype in his life. That too an unstable aircraft. So, I thought about how to give confidence to him. We did two or three things. One was to work on the control laws. We tested on a modified F16 aircraft in USA. One of the comments of the test pilot from the Pentagon was that the F16 flies better with LCA control laws. Even the aerodynamics of the aircraft was excellent. It gave a lot of confidence to our pilot."

Tejas - Featured Interview - Dr. Kota Harinarayana

more about tests on USA
"The control laws were developed with the aid of real time simulators at ADE and BAe, UK. As a point of interest, a second series of inflight simulation tests of flight control software took place in July 1996 at Calspan USA on an F-16D VISTA (variable inflight stability aircraft); 33 test flight were carried out. Another reason for delay was the sanction imposed after Pokhran II in May 1999. Scientists working at Lockheed Martin, USA were sent hack; equipment, software and documents were impounded."
BHARAT RAKSHAK MONITOR: Volume 3(5)

 

[Tolaha]

The article says it never happened due to sanctions, so how could it be?

Tarmak007 -- A bold blog on Indian defence: 3. Surviving Sanctions only to become World-Beaters: Tracking the fly-by-wire FCS story from ADE (Part-III-A)

Tarmak007 -- A bold blog on Indian defence: World-Beaters: The fly-by-wire FCS will take India to new heights (Part-III-B)

 

[Kunal Biswas]

Some details on NLCA :

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INS Vikrant :

INS Vikramaditya :

 

[Abhi9]

Problems with HAL production line for Tejas

Rs 1,500 cr more for combat aircraft Tejas as HAL fails to meet targets