Our club is into combat foam wings from combatwings.com. they are 48 in wing span and use a speed 400 motor and 1500ma nicads. We put up 5 to 10 wings at a time and try to knock each other down, hits are commow but actually knocking a plane down is rare. These things take alot of abuse, are easy to fly, repair with packing tape and fairly cheap. Check out the web site for videos.