I had a magnum 52 once. This engine had phenomenal speed and power. Unfortuneatly I could never get it to run for a complete flight unless I ran it so rich that the glow plug lasted about 3 or four flight before it became useless. this engine would be running at 3/4 throttle and it would just go dead in mid flight. A year and a half later and sending it back for repair yielded no joy. When someone offered me a buck for it I happily took him up on it. He got it too fly for at least two flights but I haven't seen the engine in 2 years since that day. Even I could get it to run for a few flights but it would kill the plug.