I'd say it's one of the F3D-class pylon racing planes (with one of those raging Nelson motors)....200+ MPH
http://www.resume-connection.com/f3d...H_RCPlane.mpeg
Next up would be QM-40 (Quarter Midget-40) which comes out at 180+ MPH
Then in the Sport plane class would be our Diamond Dusts and Weston Magnums with Jett or West motors (140-150 MPH)