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Vibration 45GX2

Old 04-23-2007, 07:34 PM
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Default Vibration 45GX2

I have mounted the Evolution 45 on the airframe and ran it. The firewall vibrates 1/8" side to side. Only at idle. Is it possible that rough idle will reduce with break in and tuning? The DA boys all say their QQ 86" Yaks are very smooth. Also, would a cannister help? Never had this problem with other gassers.
Adam
Old 04-23-2007, 07:54 PM
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Default RE: Vibration 45GX2

Some vibration is normal from any single cylinder engine. What does Horizon support have to say about it?
Old 04-24-2007, 12:09 AM
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Default RE: Vibration 45GX2

Adam,


It could be the frequency of idle RPM coincides with the natural frequency of the front of your plane, or with one of its secondaries.

Heterodyne, if you will.


If the model does not disintegrate, live with it.
It will decrease as the engine accumulates more time.
Old 04-24-2007, 10:19 PM
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Default RE: Vibration 45GX2

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Old 04-25-2007, 09:17 PM
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Default RE: Vibration 45GX2

Thank you tailskid. Thats just the news I was hoping for. There is very little time on it and looks like I will just remove it from the airplane and continue to break it in. I dont want to shake apart a new airplane. I can see a blur on the side of the engine box to the firewall when the engine is running. It shakes an 1/8"! Horizon said to put some more time on it before giving up. I hope it does clear up, it would same me from having to swap to a DA. Thanks for the help guys!
Adam
Old 06-13-2007, 09:45 PM
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Default RE: Vibration 45GX2

Mine did the same vibration thing....then the low end was leaned out and this engine now purrs......

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