I am an ME and have been building & flying helis for the past 20 years. When I finished
college I gave it up (Hirobo Cobra). This winter I bought a DF IV to fly around in the garage
& the camera was kinda cool too & it got me interested in gas helis again. Anyway, over the past
several weeks I decided to get back into gas helis & bought a Caliber 30 ARF kit w/ the OS32
SX-H engine and Futaba FP-6VH radio. I upgraded the kit gyro to a GY401.

To make a long story short, this thing has experienced violent shaking since the minute I first flew it.
I have statically and dynamically balanced both the tail & main blades & checked the tracking & pitch
many times. I know the mainshaft isn't bent because you can spin up the blades to max rpm @ zero
pitch on the ground and everything is smooth, but get in a hover and it will be smooth for a while and
then start shaking in larger & larger amplitudes and if I didn't set it down, it would shake itself apart!

I'm ready to take it back & get my money back & buy something else.

Anyway have and ideas or comments?

Thanks,

A frustrated Caliber 30 owner