Center of gravity theory.
if yours and all other theory's about flying further is correct without electrical or any control who will take care about trimming,we also have to know the c.g. of the aircraft, because the c.g. will shift and there will be no trimming so the aircraft will climb or descend during fuel burn.
Last edited by Air33bus; 22nd Mar 2014 at 14:21.
Reason: post 7345