activate button 1 to activate the flying mode
deactivate button 8 to shutdown car engine
btw, the car engine is controlled by the throttle instead of the default stick pitch
no other special operations

in the previous version, I used a lot of pistons to extend multiple pieces of wings out, but it will tremble very much when speed over 130, so I deleted all the piston DOF of wings and attach multiple pieces of wings directly on the car body, now, no trembling, more small to evade possible collision, more fast than before, more easy to control.
One another thing, I have just won over the default original P-51 mustang in the Indy Air Race,

the most difficulty aircraft race in this game.
Enjoy Your Self!
Here the Youtube video come!
Youtube of Indy Air Race