A guy in my club has a 3w-48 B2 in a GreatPlanes Patty Wag. Had to cut a little of the cowl for the plug caps.[:'(] His opinion was it was too much power. He flys mostly at 1/3 throttle, and until the engine broke-in and the idle settled down, he had to kill the engine at touchdown, or he'd be out of (paved) runway. But then again, he has a huge grin on his face when he pulls up to a near vertical, rolling climbout after a 25-30 foot rollout on take off!