That sure brings back a memory. But the engine was a McCoy red head 35. Every time the dad removed the battery clip the engine would die. I was at the flying field at McCord AFB it was the old motor pool on base. I was young maybe 13 and was flying my Ringmaster. It was powered with my trusty Fox 35. STUNT. Never had a McCoy at that time but several AF guys swar by them as a great engine. I just watched and another AF Tech Sgt a friend showed up.to fly his super ringmaster. The father was getting really flustered and what he did burned up the glow plug. The engine quiet firing. I had never seen them at the MP. But we helped me and the TSgt Gave the father a new plug opened up the needle valve 2.8 turns she fired right up. They had built the Top flight magician. Great memory.AJ