Hello,
I have a Goblin 380 and the Spirit FBL and I haven't been able to sort out some tail wag that I have no matter what headspeed/tail gain I run, even with the speed up tail pulley.
So today I did some tinkering with the Spectrum Analyzer and found something interesting. My tail (Z Axis) is showing massive vibrations (316-350), and vibrations of about 63 on my X Elevator axis, with 9-15 on my Y Aileron but when I disconnect the tail belt from the main shaft it goes below 20 on all three axis.
Attachment:
File comment: This is the Z (Rudder) axis running as "normal."
Z axis.png [ 96.51 KiB | Viewed 792 times ]
Z axis.png [ 96.51 KiB | Viewed 792 times ]
So I'm pretty sure the vibrations are in the tail, but I wanted to check with you guys and see how you would proceed and what I should be looking for.
Steps I've taken:
1) Remove tail blade grips - No change
2) Remove Pitch slider - No change
Because of how this heli is designed, if I remove the tail shaft I can't rule out bearings, the supports that hold the bearings, or the tail pulley.
My guess is that it is the tail shaft, but I just want to make sure I'm on the right track and the figure out the best way to trouble shoot the problem.
Thanks,
Nathan
| Attachments: |
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File comment: This is the Elevator with the tail belt still attached. x Elevator.png [ 39.52 KiB | Viewed 792 times ] |
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File comment: This is the Z (Rudder) axis with the tail belt detached from the main gear. Z axis no Tail.png [ 20.92 KiB | Viewed 792 times ] |