Hello people. Ive been making a sim of a P-51 Mustang in Blender3d and am working on the physics. Ive got the Drag, Lift and Thrust with help from here. I need help now with: Flight Dynamics (Roll, Yaw and Pitch physics) I need to know the amount of force regarding torque on the aircraft. A Calulation for RPM, right now I've just got it set on the 'throttle' value, meaning that it changes every time the throttle goes down. I know that RPM depends on a lot of factors, and if a calculation is available it would be great. Undercarriage Drag Simple. Just surface area * mass flow? and maybe rolling friction. Flap Drag and Lift I know that flaps alter wing area, making this pretty simple. Not too much detail is needed (I'm a tenth grader so take it easy- not dumb either so if you explain it to me I will eventually get it . This is all I need to finish my physics model so plz find some time to help me out (There's some really qualified people out there who might want to inspire a 14-year old!