Originally Posted by Del-Dredd
May not be CoG of frame but is Center of lift and where you want CoG to be as that is also the center or pivot moment ie where the craft will pivot around when banking, pitching and yawing.
So, as the back motors gets closer by design, the centre of lift moves further back?
Centre of lift will be on frame centreline halfway between back and front motors. Since back motors are tilted, it will actually be further forward, assuming all motors produce same thrust.