RE: Hanger 9 Pawnee 40
I used a 1100mAh battery that I think weighed around 4.1 ounces. There is plenty of room in the rear of the fuselage. I made a light ply bracket that glued in between the fuse sides and braced it with some tri-stock. Then I just wrapped the battery in foam and zip tied it to the bracket. A couple spare servo extensions gave me enough wire length to mount the second switch under the hatch.