Originally Posted by flarssen
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.
Yes, the center will go farther back the closer the rear motors are together. That's a good point about the rear motors since some vtails use different size props in the back and therefore will produce different thrust. I see what you mean about the motors titlted causing the center to move as well.
Too bad the only real way of finding out is to build it a certain way and hopefully not end up in a crash.