I created an account years ago just to download mods from CombatAce, so i feel a bit guilty to post something so late now. I've just found what may be causing the issue: I played my heavily modded SF2 and noticed that the F-14 had the same issue on both the stock and my modded Desert terrain. Then I played the same mission of the Desert Fury campaign on a completely stock SF2 and it didn't have the issue. After checking all .ini files in my modded SF2 I tried to remove the FlightEngine.ini and all aircraft soon worked correctly as usual. I hope it helps.
P.S. Still I have no idea which parameter in the FlightEngine causes this.
I created an account years ago just to download mods from CombatAce, so i feel a bit guilty to post something so late now. I've just found what may be causing the issue: I played my heavily modded SF2 and noticed that the F-14 had the same issue on both the stock and my modded Desert terrain. Then I played the same mission of the Desert Fury campaign on a completely stock SF2 and it didn't have the issue. After checking all .ini files in my modded SF2 I tried to remove the FlightEngine.ini and all aircraft soon worked correctly as usual. I hope it helps. P.S. Still I have no idea which parameter in the FlightEngine causes this.