A rotary can be run without a load, that is without a prop and PSRU. You can use dynamic balancing equipment just like when doing a prop balance on the bare engine. (you need a 2 sensor system) This is what is done to a piston engine except they just spin the crank/rotating assembly weighted up to match the rods and pistons. You drill holes to lighten, or press in heavy metal to weight various places in the rotating assembly. On the rotary you can just work with the counter weights.
WRJJRS@aol.com wrote:
> Dynamic balancing can compensate for the oil and could even be done on > the running engine for those of us with nothing to do!
> Bill Jepson
Bill, could you give us a quick description of how this is accomplished? At some point in the future, I hope to have this airplane built, then I will be in the enviable position of having nothing to do. "Doesn't shake much" is a relative term, and I don't think a Lycoming should be our starting point for comparison (since my push mower with the chipped blade can beat a lot of them 8*)
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