Had a Hangar 9 J-3 powered by a De Walt drill motor with a belt reduction and a 15 x 10 prop. Bought a set of Bob Shattleroe custom spring loaded landing gear for this 10 lb beast (17 cells). This gear has a coil spring suspension and slight toe-in. Takeoffs were never a problem, but I tried to fly it in as scale-like a manner as possible: hold up elevator, slowly increase throttle, ease off on the elevator as speed builds to let the tail lift, pull back gently after top ground speed is reached. With plenty of down and right thrust I never had a torque or ballooning problem. The shock absorbing landing gear really helped smooth out touchdowns. I lost it to a vicious spin when my transmitter antenna loosened up. (Now have same power system in a Kyosho Tiger Moth, it handles crosswind better than the Cub.)