Hi I have a 7.5 pound 81" Cub ARF with an AXi 2826-12 running on four cells at 3200 ma. My prop is a 13 X 8 APC. I am using a 40 amp Jeti. This combo has given me over 50 outstanding flights at 3,000 feet and 100 degree plus temperatures. Plane will easily take off in 15 to 20 feet, loop roll, spin, fly inverted and land with 2 to 5 bounces. One of the most fun flying planes I have had in long time. Norm