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![]() rrKey Veteran Indianapolis, IN USA |
Vibrations OK, so I maidened the pod and boom Trex 600N (converted to electric with the clutch) over the weekend. Did not have the tail boom supports mounted and no tail fin (basically flew it exactly like it will be in the fuse except installed the landing skids). Using Spin 620mm asymmetrical blades (first time I have ever used these). Stock Trex 600 3G head with the Align red dampers (the softest). Main blades are spot on CG and weight wise. I am noticing a decent vibration in the skids and the tail boom has a vertical up and down vibration to it. I tried 3 head speeds (1480, 1570 and 1650) and the higher head speeds looked like it caused the frequency to increase but the amplitude of the vibration to go down (just visual observation here). I removed the main blades and spun up the head (tail blades still installed) and the boom did not have the same up and down vibration as it did flying with the main blades. Tried a set of Rail 606mm (3D) blades, and saw the same basic vibrations as the Spin blades. Main shaft is true, head seems to spin true. Tracking is within a half turn (can only go full turns on the pitch links).I am at a loss as to what I should be checking to track down my vibration. All of my 3D pod and booms (which obviously are running much higher head speeds), I have never encountered vibrations that I am experiencing with this model and these lower heads speeds.Can dampers (too soft) be causing my wobbles? Do I need more flights at higher head speeds to "work the dampers in"??? Looking for some advice on what to check as I am in a new realm with these lower head speeds, soft dampers and asymmetrical blades.Thanks in advance. |
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Keygrigger
rrVeteran Mississauga, Ont. Canada |
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![]() rrElite Veteran Mesa AZ. USA |
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![]() rrElite Veteran Palos Verdes, Ca. USA |
Barry |
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![]() rrProfessor Sherwood, Arkansas 💎Sustaining Member |
X3^^^^ Put the boom supports on and then try it...
As mentioned, the boom will be inside the fuse tail boom and attached which basically replaces exactly what the supports were doing..Let us know if that shakes the problem out (HA, made a funny!!!)!! ![]() ![]() |
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![]() rrKey Veteran Indianapolis, IN USA |
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![]() rrElite Veteran Palos Verdes, Ca. USA |
![]() Barry |
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![]() rrKey Veteran Indianapolis, IN USA |
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![]() rrElite Veteran Palos Verdes, Ca. USA |
![]() Barry |
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![]() rrProfessor Sherwood, Arkansas 💎Sustaining Member |
Smoooooth!!!! We Like Smooooooth!!Glad to hear you found the cause!!!Stan![]() |
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