Posted by DustDevil
To make your plane flying, You just have to compute forces : P, aerodynamics, inertial applied on your planes, => accelerations => speeds in planes coordinates and if you want to, then you can compute AoA and SideSlip angle ( wich is in arcTan(Vy/Vx) ).
Be
very careful how you do that!
In particular you
cannot use the speeds in aircraft axes for the purpose of deteriming the motion. Because the aircraft axes are themselves in motion, and are not an inertial reference system. So the standard equations of motion cannot be applies in that axis system.
If you just stay in aircraft axes your model will be unstable in pitch.