Hi Jim,
I have a XYZ 53 CC Gasser. Been flying it for months. 7,500 RPM with a 20-10 Master Airscrew Classic Prop. I'm using NGK CM6 plugs. 40-1 oil mix and a 2 cell lipo with a 5 volt regulator.
You can get the regulator from Hobby People in California. It's called a "Switch harness with BEC. AIRPRT 96700. You can NOT use a NIMH battery. I think the NIMH batteries might be OK if you had a capicitor to smooth out the Voltage Peaks.
I think that I should be using more prop and that 7,500 is really too fast for the engine. I have several 20-8-14's but I don't want to break them. I have my motor mounted on 5/8" stand offs with the Carb Down and the Mufflers UP. Runs great and Hand starts.
Larry Kopecky
Conyers, Georgia
[email protected]