I have an Oxy 3 Qube (3 blade head & 3 blade tail) with the uSpirit installed and have about 20 flights on it.
Once during a test rescue in flight, the heli drove downward, nice and flat ( just in the wrong direction) breaking the skids when it hit ground.
I believe this behavior is a sign of to much vibration.
All my pre-flight tests, and some in-flight test rescues , since this downward event have been flawless. Collective goes upward as expected. In checking the logs, I occasionally see warnings for high vibrations, even when I have had successful test rescues in flight. I now test much higher up so I can recover should the heli head toward the ground.
Today I removed the main and tail blades and held the Oxy to my workbench with tape. Then using the BT android app I checked the vibrations at 3 HS settings and found this info:
HS of 2950, 3175 and 3650
X-axis: 4%, 5%, 8%
Y-axis: 60%, 60%, 38%
Z-axis: 18%, 17%, 25%
Attached are 2 photos of the showing the vibration graph. The vibs are slightly different than what I noted during the testing, but close.
Do the graphs or values noted above mean something concrete that I should check on the Oxy?
Other than having concerns about rescue, the uSpirit has worked well on the Oxy.
Thanks for any input.
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File comment: Graph looks very similar at both 2950 and 3175 HS Y_2950_3175hs.jpg [ 35.88 KiB | Viewed 227 times ] |
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File comment: Graph at 3650 HS Y_3650hs.jpg [ 37.11 KiB | Viewed 227 times ] |