ORIGINAL: DenverJayhawk
I have an OS95AX with a pretty bad vibration at lower RPMs. When it's close to idle speed, the vibrations are very noticeable, especially around the vertical stabalizer. But at any from mid range to wide open throttle, the vibrations are no longer present. I've already checked all the screws/bolts on the mount and firewall and everything is tight. I've also tried a few different props and I also balance all my props. Any thoughts?
The other thing I've noticed is that if I spin the prop in reverse (clockwise when looking from the front), at the compression point but before it turns over there is a slight metalic click or pinging like sound. Is this normal?
DenverJayhawk,
It seems that your model is reaching a resonace vibration at lower RPMs, and there is no much more to do about it than modifying the natural vibration of your engine-model.
If the vertical tail shakes more, then your main vibrations may be in a horizontal direction.
Try changing the position of the propeller respect to the shaft, and also try a propeller of different weight (lighter would be better, I believe).
Best luck!