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11-21-2006 02:47 PM  11 years agoPost 1
darenh

rrApprentice

Hull, UK

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Anyone had experience of this:

I have been flying for a couple of months a new webra 55 in my R50, I liked it that much I replaced my other two R50's with the same engine.

I had been tuning my 540 gyro and messing around a bit with different configurations and fuel mixtures.

My R50 started to develop, what I can only describe as a resonance noise (drone). It is not constant but intermittent at 2 - 3 second intervals.

At first I thought I had altered my gyro to much, I also noticed I had caught the tail push rod guide, IE slightly hunting tail sound. I also change the tail blades and the gyro.

After further testing I am now thinking it is engine resonance as when I have a low RPM or a very high RPM it disappears. But at around 1750 rpm its their.

My next move is to change the fuel lines.

Any suggestions please?


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