mark IX'
I just got back from flying a new battery. Made out of Hobby People 4s 3200mah 30c packs. The assembled pack is 12s 2p (24 cells) 6400mah and is good for 60c. Temps. are lower, rpms 200 higher (Graupner 22-12 sport prop). Highest speed reached was 118mph level flight. The old 12s 5300 45c pack gave me 5 min. (3900ma) with two approaches. The first flt. with the new pack lasted 7 min. and used 4900ma with 1500ma reserve. I will carefully extend flight times with throttle conservation and I think I can go 9 min. with this pack and still have enough for 2 approaches if I miss the first. This 24 cell pack weighs about 12 oz. more than the old pack. The plane doesn't notice the extra weight.