Paul, for higher horse power rotary engines, could you not use, two current planetary gears sets in tandem? with the sun gear shaft and case lengthened, The two planet carriers could be bolted or welded together to keep the carriers aligned. It would double the power limit of the drive reduction unit.

Dave James

Yes. The PT6 gear box is dual planetary's.

Better to just use a turbo and 6500 RPM as it pays off up high.

Paul Lamar


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