Robert M. Gary wrote:
BTW: There is a formula to get Vy, Vx, and Vso (and probably best
glide) for each weight. I don't have it in front of me right now. That
formula is on the Flight Engineer FAA written exam.

Vs is easy, but modifying Vx and Vy for weight would be a very complex
equation if done correctly since it would have to compensate for propellor
efficiency, engine efficiency, etc as the airspeed changes.

Hilton