The motor is a Graupner Speed480 7.2v and the 720mah are of the aaa size. The 1700mah pack is one I fashioned out of the new Enerigizer aa size NiMH, but I'm not sure about their reliability. I don't think they can handle the high amp draw like the one specialized for r/c flight. Can you suggest a cell that will handle up to 15A, in the 800-1100 mah range? Thanks.