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Then ...lets make an autogyro , i can help with physics also
I doubt you can code your own helicopter physics engine in c++ and somehow inject that into the sim.
Its the rotational element which is crucial here. We could theoretically use propellers for this at the moment but to get it just right we'll need some actual blades.
The wing we have right now could also be used but its not specifically designed for rotor blades which have 3D effects, airflow from the rear and the front at the same time on the same blade as soon as aircrafts speed is greater zero, etc. We'd have to make all sort of connections to get the hub plane working, in the end the blades should travel around the rotor mast, should be able to deflect up and down and left and right (flapping) so that you can maintain straight and level flight without rolling away. This is true for autogyros as it is for helicopters.
This stuff is not easy, I've had lessons about helicopters physics at the university and I tell you, may look easy but it really is much more complex than I ever thought. Nothing on the rotor is stationary, the incoming air sometimes comes from the left or from the right, the front and even the rear, the wash of one blade hits the next one, there is all sorts of high mach number compression going on one side whilst the other is in a stall, partially with air coming from the trailing edge, etc. This is not your regular wing anymore.
I'd say, lets just focus our efforts into making a lovely carbon cub. When helicopters arrive in Aerofly we can surely use the new physics elements to create our own autogyro or helicopter.