I have a Pro unit mounted on my Gaui Hurricane plastic frame stretched. It has been flying for over a year using 500 mm blades and has been great. I had some ESC issues that caused two crashes which has resulted in replacing the ESC with a HW 100 v3 unit which seems to have no issues feeding power to the servos. Both crashes were power loss - rescue mode got the heli flat so the damage was skids, boom, etc. and amazingly not blades, with a "free fall" (my auto ability is nearly non-existent).
Since the crashes I have been fighting a vibration which shows in the skids, tail boom support pipes, CF tail servo push rod, and tail vertical fin. At various times all are moving so fast they have a blurry look when watching while hovering.
I have tried swapping the tail assemblies, new tail belts, etc. I'm currently setup with a long-boom and 550mm Align CF blades. I removed the blades and did the vibration analysis and saved the plots (see attached). The X and Z snapshot images looked about the same, so I only show one. The Y was more dramatic so all three are shown along with some arrows pointing to items that I think are the motor, tail and head.
The Y axis (yy.png) seems like the problem. Is this showing me that I need to motor bearings? What should be my next change before re-running the test?
Thanks to anyone that sees and comments on this post.
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ZZ.png [ 36.39 KiB | Viewed 630 times ] |
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XX.png [ 34.05 KiB | Viewed 630 times ] |
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YY.png [ 81.46 KiB | Viewed 630 times ] |