ORIGINAL: telecomm_1
Hey All,
I need some insight. It seems my f40 has developed a wobble in hover- it isn't a vibration, more like a low frequency dolphin effect. i landed and did some low rpm checking and it appears my main gear has a wave to it when spinning...what could this be from? it seems to transfer up to my swash plate and all the way up to the core (my tesing was with blades removed to eliminate them as a balancing problem)...
could my main shaft be bent? Anyone else have this problem?
Thanks
I suspect that you may have already answered your own question.... a bent main gear shaft. You could remove the gear with the shaft and roll it on a flat surface and you should be able to detect even a slight bend.
Another possibility might be a crack in your mainframe that is causing a gradual flexing. You might want to closely check the entire area below the servos and above the main gear.
Bill