Hogster
Key Veteran
Location: Surrey, UK
| Hi PDF, thanks for the warning  Although I do have good news on the tail rotor front! The vibes are gone! 
In the end it was caused by the bearings being a slightly loose fit in the tail rotor blade grips. So I coated the outside of the bearings with thin CA, let it dry, and then pushed the bearings back into place and now the tail is smooth 
The bad news is that the main rotor vibration is just as much there as it was before  It seems no amounts of tape, added to either blade, helps. I was able to get the heli off the ground, but I could sense that my control inputs were putting the heli on the brink of vibrating. During spool up there seem to be specific rotorspeeds which cause parts of the helicopter to start resonating. I will try dismantling parts of the mount, bit by bit until it's as stock as possible .... although surely if the system is perfectly balanced it shouldn't resonate at all? In other words, even if I removed the mount and other parts, won't whatever caused that vibration/resonance in the first place will still be there? 
Cheers,
David |
