600n with the shakes

[del19_82]

The only 2 times my 600 shook that badly was, 1, when the headspeed wasn't high enough using the firmer dampers & the heli shook really badly & 2, when the blade tracking was out quite badly after a crash.

[dieselcarb]

back with report shakes was duff engine, it had i high pitch noise witch seem only i could here. (i hear ultra high frequencies i.e dog whistles etc) and thought it was normal.
Well engine run beautifly but drank heavy and whilst flyin just quarter tank with main needle at just over 1.5 turns plug popped. I checked none fellin cylinder look ok so put another plug in, with main needle richend too exactly 2 turns out took off and bang engine rattling piston broken

well other than engine being a write off I HAVE NEVER EXPERIENCED A REAR BEARING being kernackered like this only gallon and half old but hay ho

Put a second hand engine in witch had new bearings wow so much quieter no ultr high squeel and .......... no shaking at higher rpm's

thanks all the best terry