[Help] Looking for command line

[Drunkenup]

After recent experimenting, I was able to create a helicopter physic similar to that in ARMA2. What I did was, add another engine enabling high speed level flight, with high AoA capabilities not existent in any PR helo atm, to complement the existing engine allowing vertical thrust.
The vertical thrust engine cuts out at about 300km ingame, and my goal is to allow the high speed engine to begin its work and end it at somewhere near that speed. What I'm looking for is a command line I can add in the tweak files to enable that capability. Right now the engine starts at takeoff and the vertical thrust engine is rendered useless.

Is there a certain command?