borocouncilman
10-18-2007, 05:40 PM
I've been experiencing a high frequency vibration at the tail rotor of my Honey Bee King 2. This is a recent development. The airframe has about 30 flights (~ 5 hours of time) on it now with no major incident or accident. The canopy and skids don't seem to demonstrate any hint of vibration. The vibration itself seems to be limited to the tail rotor and housing like something is going wrong back there. Interestingly, I can see it in vibration along the tail rotor pushrod as well while the boom doesn't look like its buzzing.
Having already learned to fly on something else, the HBK2 been getting "exercise" from Day 1. I thrash it as my cheap heli. I don't do any hard 3D with it, but I do throw down hard and fast forward flight 2D transitions (including 180s and piros with 90 degree stops). I really make that little helicopter work.
With flight time, I have noticed that the head itself has really loosened up. It's not "too loose", but it definitely feels broken-in now. There is some play where there wasn't play before.
While it is difficult to pinpoint, I suspect that I may be "wearing out" something at the tail mechanism, but I really don't know. Belt is fine and was recently lubed with silicone -- something that I did after noticing the increased vibes. It hasn't made any difference.
Does anyone have thoughts?
P.S. For the folks wondering just how hard you can go 2D, check out scratches on my outrunner. While the servo cannot touch it on the ground, things are clearly flexing in flight. Check it out.
Having already learned to fly on something else, the HBK2 been getting "exercise" from Day 1. I thrash it as my cheap heli. I don't do any hard 3D with it, but I do throw down hard and fast forward flight 2D transitions (including 180s and piros with 90 degree stops). I really make that little helicopter work.
With flight time, I have noticed that the head itself has really loosened up. It's not "too loose", but it definitely feels broken-in now. There is some play where there wasn't play before.
While it is difficult to pinpoint, I suspect that I may be "wearing out" something at the tail mechanism, but I really don't know. Belt is fine and was recently lubed with silicone -- something that I did after noticing the increased vibes. It hasn't made any difference.
Does anyone have thoughts?
P.S. For the folks wondering just how hard you can go 2D, check out scratches on my outrunner. While the servo cannot touch it on the ground, things are clearly flexing in flight. Check it out.