davehour wrote:Just curious if this model can be flown with those vibrations.
I flew for months with high vibrations until I measured the levels just out of curiosity. Not saying that it’s ok as it depends on how much vibrations present and also the wear on bearings. Even the tightness of the tail belt or the tail blade can can have an effect on vibrations. I’m flying with a somewhat loose tail blades that I can move with a finger. Too tight then I get higher vibrations which for the life out of me cannot solve after balancing everything.
Someone please correct me, vibrations can confuse the accelerometers used for self leveling which is also a part of rescue.
Instead of flying this new model with the vibrations detected by the Spectrum Analyzer, I started systematic approach to isolate the vibrations, as suggested by Senaka.
I disconnected the main belt to run the motor and pulley only, and this is what I got.
Seems the next thing to do is to test with another motor.
Installed another motor from a heli which has OK vibrations in all axes and at all head speeds, running the motor disengaged to have equal testing conditions.
Was surprising to find the TB70 showed the same vibrations pattern as with the original motor.
Conclusion:
The vibrations detected in the TB70 are inherent.
Try increasing and decreasing the rpm by 100 rpm’s at a time while you’re there to see if it makes a difference. Also the pinion may have two sizes of grub screws where the longer one goes in where you have the indent on the motor shaft.
