Today my 31% edge with a 3W75 gas engine crashed.

I took off, made a circle and was coming back around (took about 40 sec) when all of a sudden I didn't have control of the plane. It started a nose dive and went in at
about a 45 degree angle. I have been flying the plane for about 6 months now with no problems. However, today I moved the ignition battery farther back into the fuse to adjust the C.G. rearward. This put the ignition battery within 3 inches of the PCM receiver. It had previously been about 10 inches from the receiver. I'm not sure if the RF from the ignition caused this but it was conincidental with me moving the ignition battery pack close to the receiver (within 3 inches). I thought 3W ignitions are shielded.

Greg