I am really fascinated with Steve's design. I think it could
be a major breakthrough in the cost of PSRU's.
His use of low cost off the shelf two inch hollow shaft was a brilliant idea.
For those of you not familiar with the QD coupling here are a couple
of pictures. The coupling works by friction alone. I think the torque
capacity of the this coupling could perhaps be enhanced with three
more bolts.

I think you could sell a kit Steve. You could save people money by
offering such things as thick wall aluminum tubing cut to the
proper length for the housing. Also perhaps other machined parts.

Paul Lamar

I believe the same coupler was used on the Turbo Suzuki belt psru
about five years back.  Amazing how  much grip was created by fairly
light torque.  The one I'm familiar with had a bolt ring with  8
maybe more  quarter inch  bolts.  That was a neat drive with
alternater and crank trigger ignition built in a la Briggs and
Stratton.    Jerry

 
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