Roger Wheddon designed this 52” wingspan electric powered aerobat for a 4240, 740 KV motor turning a 12 x 8 E prop. Marlin usually gets about 6 minutes out of a 4S 4000 LiPo. The rear fuselage is 3/32” balsa covered foam, between F3 and the tail, instead of using formers and snake supports! It works well. Copydex is used to glue the foam core to the balsa sides.