Originally Posted by
jvaliensi
The CM Jet tank is a better design, in that the CG will move less as the tank is drained. This is because the CM tank is shorter and wider and has less of a moment arm in relation to the CG of the aircraft.
Pi$$ing in the sea difference! A tank with smooth outer surface and rough inner to wear the clunk is not a better design. In the U.K. all 2m Rebel’s use the stock tank and fly perfectly when balanced my way.