Rotax 277 shakes badly below 4000 rpm
At 4000 it is not bad, it starts banging when it goes below that. At 2000 it feels like every compresion stroke makes a painful bang. I dont even want to run it on idle, afraid somwthing will brake. I wish i could look at another airplane with similar motor to compare but there is none around. I was hoping someone has one and can share experience.
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