normal aircraft design/ historical error


Junior Member
Old and proper aircraft design :


Historical Error :



center of gravity is where it would balance from finding the point to lift on the keel and determine the fulcrum point of balanced and then lift from the mast 90 degrees straight up to find where it balances the fulcrum point where it hangs straight up and down. The previous is close to very hard to accomplish, so for the brainiachs with figures does a double hang test give these same results?