The chopper's maneveur keys same as combat and movement keys of character's.
Altitude keys are; Knife key and proning key.
Mod is tested with 12 players TDM and FFA. No bug for air combats.
1- You cant play with the bots. They are being crazy when you open it on Combat Training mode.
2- Out of map terrains could be buggy. I dont advice you to stay on altitude below 0 meters.