Nice job!
but now I think You are turning with keys and better idea is to change it to mouse moving

Will be more smooth and accurate

f.e. depends of mouse pos x/y distance from the center of the screen

But I'm sure You know that

and maybe add some swing to rotors, especially to main rotor... some effect with descending alpha in time

and maybe add some delay wiht camera movement

Cheers and good luck
