We have finally got some good weather in New York
I have been playing with my sonic and it goes ok no sound breaking runs though. I have an os .46 ax ported and polished with a mac 2 piece pipe. The engine has around 160 pounds of compression. I am using 15% nitro and a apc 8.8x9w prop. I am getting 16200 on the ground with it. My problem is that I can only get one flight before I blow the element out of the plug! I have tried an os A3, A8 and F. No its not lean. I do a run up every flight and it sounds perfect does anyone have any suggestions on a plug.