"Mike Spera" wrote in message
ink.net...
Well, I finally have one. The weird vibration out of nowhere. About 6-7
flights ago, i noticed a very slight rhythmic vibration during a smooth
straight and level flight. About 4-5 seconds of smooth flight and then 2-3
seconds of vibration. I chalked it up to the air conditions. Over
snip

Mike,
Have you checked the torque on the prop mounting bolts?
John Severyn
KLVK