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?
"Im out woodworking right now"