How do you quantify a vibration? I guess it's quite subjective.
When tested a week ago it was vicious. So hard you couldn’t hold the test stand. Part of the scale cockpit and the exhaust fell off after just two minutes ground run. I surmised that it would literally destroy the integrity of the plane if flown. Now the shims removed and it’s been run another 2 hours it's questionable as it is definitely smoother and some people do say they can take 3-5 hours to come right.

Very frustrating because in all other respects this motor is great!!!!

What I need to do is throw this onto an old airframe and fly it a few days. Trouble is the airframe tagged for the job was crashed by its owner a month ago. (Big old ugly stick)
Remember some people aren’t having issues and love the engine.?!?
It is amazing how little info is around regarding people actually flying RCV’s. I hear of people but don’t see them. Did see a guy running a CD the other day. Compression was near nil but it ran smooth as silk and hauled the plane around the sky easily.

Cheers

PS ktcanuck don't even consider flying without a minimum of two hours bench running as per the instruction. Thats a fact.