Piper J-3 Cub 40 with an Evolution .46 stalls at half throttle

by Peter
(Ont Canada)

I recently built a Piper J-3 Cub 40 with an Evolution .46 cc 2 cycle glow engine in it. After about 10 mins of flight (at half throttle) the engine stalls. There are no fuel issues and I'm pretty sure I have my high and low speed mixtures set right. Any suggestions on what the problem could be?

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Out of fuel
by: rcdude07

How much fuel is left in the tank when this happens? Usually I'd get about 5-6 minutes on a half tank on a 45 sized motor. My first response is you are running it of fuel.

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Fuel
by: Peter

Not a fuel problem. The plane only uses about a quarter tank of fuel after ten mins of flying because the engine is a little oversized for the plane.

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