Thanks, I'll take a look at it when I get home. I didn't set that so it must have done it by itself. But it still doesn't fully explain why it SOMETIMES won't do the advanced model. I can understand why it won't work on modded choppers by default.

As for realism, I'm playing with a keyboard so yea... don't want a sim. Just wana fly choppers like I always have in ArmA.

EDIT: That worked, thanks.

Yea I have the engine on option keybound already and don't have any intention of using the advanced flight model any time soon as I was fine with how the helicopters were on the old flight model. That's about as realistic as I personally want it. Either way, I have no gaming controllers so it would be really awkward on keyboard.