Hi there all you RC people. I am new to this world--been a dream from long time coming. Only problem is--I am stuck out in Nigeria--No Rc club, hobby shop, support,etc around. Only support is the net. OK Timbo--I know it is not your problem, but I have to live with it. I have a Piper 3J Foamie, but the nimh battery packed up. I also have a Cessna 182, but the battery is much heavier. I want to use the latter on the Piper, but can some-one please tell me how to determine the cg. Everybody talks about this, but nobody wants to explain how the cg is detirmined on any plane. Is there a calculation or any specific method???