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