Paul,
 i was asked to look at the Crossflow Psru by a friend. I went on their web site and of course there everything looks great. Didn't we have a thread previously about someone who had trouble getting their parts from Crossflow? Their layout looks like a cross between the Powersport reduction drive, (internal spur gear) and Mistral, with a helical drive to run a prop governor. No details on how they pressurize the prop though.
Bill Jepson

 
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