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Large vertical speed + level chopper orientation causes large change in velocity
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When you take the MH-9 Pawnee and induce large vertical airspeed (found that it works near 30m/s, not too much higher or lower though.) in the downward direction, then orient the chopper to be level with the horizon, the chopper will behave very erratically, causing large increases in IAS (1000+) and rapid spinning. Also, when the helicopter hits the ground and you die, the helicopter goes flying off in a random direction.


Legacy ID
Advanced Flight Model
Steps To Reproduce

1.) Take an MH-9 Pawnee up to 500m on auto hover.
2.) Disable autohover.
3.) Induce engine failure by setting fuel in the aircraft to zero. (vehicle player setFuel 0)
4.) Point nose of chopper down and reduce collective to nearly zero.
5.) Pull nose back up, try to get vertical airspeed as close to -30m/s as possible.
6.) Keep chopper as level as you can with collective at nearly zero.
7.) Chopper should begin to flip out and velocity will increase to insane values, throwing the helicopter across the map or into the ground.

I also caused the game to hard crash due to this bug; the IAS increased to a value that couldn't be contained by the digital display number for the IAS, I'm assuming that maybe the airspeed of the chopper caused some sort of variable overflow or something, dunno. All I know is that one second my airspeed was very high, and the next I get the "ArmA 3 is not responding" box.

Explained further and illustrated in this video:

Additional Information

Explained further and illustrated in this video:

Event Timeline

batboyx2 edited Steps To Reproduce. (Show Details)Aug 7 2014, 6:56 AM
batboyx2 edited Additional Information. (Show Details)
batboyx2 set Category to Advanced Flight Model.
batboyx2 set Reproducibility to Sometimes.
batboyx2 set Severity to None.
batboyx2 set Resolution to Open.
batboyx2 set Legacy ID to 3624864307.May 7 2016, 7:10 PM