Joe, the prop has a leading edge and a trailing edge the same as a wing. The leading edge of a "Pusher" cuts into the air and if you reverse the leads on the motor with a tractor prop, all you will get is a tractor prop running backward. It will give thrust, but be inefficient because the trailing edge of the prop will be biting into the air first. Contact Radical RC.com right there in Huber Heights, and get a pusher prop. RC Hobby on Harshman by Stebbins High School also has them.[img]i/expressions/face-icon-small-smile.gif[/img]