An Indian Tejas fighter jet crashed during an aerial display at the Dubai Air Show

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fitpOsitive said:
You commented out all real functionality... 😁
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Those hyphens were just for indentation, I am a Java-man which is totally different, for me this was pseudo code :P

And Java code will look like this:

if ( pilot_is_irresponsive) {
--if ( altitude_is_low) eject();
--else Perform_balancing_maneuver();
}

#Hyphens used for indentation :P
 
baqai said:
he crashed in middle of a highway where traffic was flowing, i saw a dashcam video of that
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Not exactly the highway.

The Highway would have been E611 (Emirates Road).

However, this was near the internal Road that leads to DWC (Al Maktoum Airport).

Even though the road was still open after the Crash, I opted to take E311 the 2nd Highway on the way back 'cause I knew people would slow down to see the crash site & cause further delay.
 
MMM-E said:
Poland had a similar accident with its F-16
and Turkish Pilots narrowly escaped two accidents during aerial display

F-16
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F-4
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Different aircraft
F4 phantom has 2 engines, while India Tejas only 1. F4 pilots can perform such maneuvers at low ground because of powerful engine thrust. Doing that with a single engine aircraft is dangerous. Here in the incident the pilot wanted performing a low ground rollover.
That not going well. He probably realized it, he undid the rollover but too late. The engine did not have sufficient time to increase thrust to recover the height.
Just my guess.
 
hasn2009 said:
Those hyphens were just for indentation, I am a Java-man which is totally different, for me this was pseudo code :P

And Java code will look like this:

if ( pilot_is_irresponsive) {
--if ( altitude_is_low) eject();
--else Perform_balancing_maneuver();
}

#Hyphens used for indentation :P
Click to expand...
In VHDL double dash (--) is comment.. 😁😅
 
I think the more important question here is why the pilot had partial loss of consciousness.

The more I see the video, the more it seems like the nose began to dip during the Knife Edge and dipped further during the roll over. It could be the angle of the video but here's what I'm pondering on:
  • If the nose began to dip during the Knife Edge (as it seems from the videos) - then that means the necessary lift provided by Rudder failed.
  • The Delta Wing experiences more drag during Knife Edge and the tail less design for Tejas mean the Rudder is already a smaller size relative to total aircraft area - meaning the margin of error for Rudder position to provide necessary lift in this scenario is minimal.
  • FBW system automatically compensates for Rudder and Elevon position to maintain the side ways flying. If there's a malfunction here the slight change in Rudder's position would induce a sudden loss of lift and the nose will dip rapidly (as it seems in the videos).
  • The aircraft then executed a rollover where the nose dipped further - here again the stability of the aircraft is the responsibility of FBW system.
  • So if the FBW system had a malfunction it can explain why the aircraft didn't have the nose up during the rollover - which would then account for the G-LOC experienced by the pilot.
  • The pilot has to command the aircraft for the maneuver but the stability during the maneuver is compensated for and provided by FBW system - the pilot doesn't have direct control over nose position.
  • So the pilot may have experienced partial unconsciousness during the rollover but it could be because of the FBW malfunction to begin with.
  • The dry thrust on Tejas is not optimal to recover from the position the aircraft found itself and I don't think the Afterburners kicked in - and no ejection (late ejection)? further indicates the pilot may have indeed experienced partial consciousness.
  • However, I'm not convinced entirely that it was pilot error to begin with because of the above hypothesis. Tejas has design problems and India can blame US for "low thrust" engines all they want but if they already know that the engine has low thrust why not then go for Twin Engines or change the design so it's in line with engine's thrust.
  • I think the explanation by this inquiry will be that Pilot lost consciousness without mentioning why it happened when the stability of the aircraft during the maneuver is FBW's responsibility.
  • And the FBW system is India's local tech - so there's already an increased likelihood that Indian's got it wrong rather than the US.
 
Mobius said:
Never a good sight to see families grieving.....no matter who they are.......

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And yet they revill in seeing innocent Pakistanis killed and their families grieving.
 
hnn said:
I think the more important question here is why the pilot had partial loss of consciousness.

The more I see the video, the more it seems like the nose began to dip during the Knife Edge and dipped further during the roll over. It could be the angle of the video but here's what I'm pondering on:
  • If the nose began to dip during the Knife Edge (as it seems from the videos) - then that means the necessary lift provided by Rudder failed.
  • The Delta Wing experiences more drag during Knife Edge and the tail less design for Tejas mean the Rudder is already a smaller size relative to total aircraft area - meaning the margin of error for Rudder position to provide necessary lift in this scenario is minimal.
  • FBW system automatically compensates for Rudder and Elevon position to maintain the side ways flying. If there's a malfunction here the slight change in Rudder's position would induce a sudden loss of lift and the nose will dip rapidly (as it seems in the videos).
  • The aircraft then executed a rollover where the nose dipped further - here again the stability of the aircraft is the responsibility of FBW system.
  • So if the FBW system had a malfunction it can explain why the aircraft didn't have the nose up during the rollover - which would then account for the G-LOC experienced by the pilot.
  • The pilot has to command the aircraft for the maneuver but the stability during the maneuver is compensated for and provided by FBW system - the pilot doesn't have direct control over nose position.
  • So the pilot may have experienced partial unconsciousness during the rollover but it could be because of the FBW malfunction to begin with.
  • The dry thrust on Tejas is not optimal to recover from the position the aircraft found itself and I don't think the Afterburners kicked in - and no ejection (late ejection)? further indicates the pilot may have indeed experienced partial consciousness.
  • However, I'm not convinced entirely that it was pilot error to begin with because of the above hypothesis. Tejas has design problems and India can blame US for "low thrust" engines all they want but if they already know that the engine has low thrust why not then go for Twin Engines or change the design so it's in line with engine's thrust.
  • I think the explanation by this inquiry will be that Pilot lost consciousness without mentioning why it happened when the stability of the aircraft during the maneuver is FBW's responsibility.
Click to expand...
If you see videos, close ups, as soon as Pilot initiated the manouver or even before i think, Jet looks unstable.

First side to side and as soon as roll initiated nose dipped and from here it went down.

If you see the final position before hitting the ground, plane became staight but nose never went up and surge of thrust was missing too.

I dont know, i am biased may be, Dont want to pin the blame on Pilot.

But this is how I see it.
 
UndercoverJIX said:
If you see videos, close ups, as soon as Pilot initiated the manouver or even before i think, Jet looks unstable.

First side to side and as soon as roll initiated nose dipped and from here it went down.

If you see the final position before hitting the ground, plane became staight but nose never went up and surge of thrust was missing too.

I dont know, i am biased may be, Dont want to pin the blame on Pilot.

But this is how I see it.
Click to expand...

The instability of the jet while it's sideways i.e. the endpoints of the wings swaying and not in line, and the nose pitch (up and down) - is because of Relaxed Static Stability Delta Wing design - the design is deliberately unstable and the vertical back and forth sway b/w wing endpoints is because of realtime Elevon compensation being provided by FBW system. What I mean to say is that pilot only has to command the Aircraft to turn on it's side and has no direct control to keep it stable in that position.

What I'm pondering is that the pilot may have experienced G-LOC/A-LOC but probably not because he was untrained but as result of FBW system malfunction to keep the aircraft stable during the maneuver.
 
Viet said:
Different aircraft
F4 phantom has 2 engines, while India Tejas only 1. F4 pilots can perform such maneuvers at low ground because of powerful engine thrust. Doing that with a single engine aircraft is dangerous. Here in the incident the pilot wanted performing a low ground rollover.
Click to expand...

Turkish Pilot and single engine F-16

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