RE: need help configuring an airplane for electric flight.
Raul, I'll work out a decent set-up for you. But like Brad, said, I would stay as far away from the A123 LIFE cells as I could, especially if you plan on doing the occasional 3-D manuever. I crashed a plane because of those cells, no warning whatsoever on the voltage drop. They can handle amps really well and maintain a solid voltage through the flight, but when the packs are empty, that's it, there is no noticeable decrease in performance, it's just dead. Also they have the major disadvantage of being HEAVY. I had a 6 cell 123 pack, 2300 mah. That has the equivalent voltage of a 5 cell li-po, & the weight of the pack was the same as a 4100 mah 5 cell pack. Also, setting up the cut-off voltage on the ESC is a pain, if you can find an ESC that is freindly to those packs & chargers were hard to find at first but they're becoming more common.
SO, now with that in mind, I'll play with some numbers.