Maverick
Great flying planes arent they. I have three of them set up for racing. Actually one for racing, one for practice and one for a spare.
Using Power Master 15% fuel, a 9.5X7 APC prop, OS#8 plug, baffel removed from the muffler etc we have clocked these at slighly over 90 MPH with a CHP radar gun. Typically we set the engine up to hit 14.8 to 15K on the ground and go. At 15K or more rpm you start running a good chance of leaning out in the air, the last thing you want to happen during a race.