Right batteries for sp280 wing?
I've had no problems running a Gunter 5x5 prop on a S280 on 7 or 8 cell AAA, Nicads are 270mAh, NiMh are 700mAh. Static amps in is the 5A range. Nicad run time is 4min+, NiMh is in the 8min+ range. I'd stay away from a larger (hence heavier pack), it does make a world of difference in performance. Your other option might be to run Li-Poly cells.