Howard wrote:

Paul:
    A few months back we were discussing someone's PSRU build from a stock
Mazda transmission and the prop loading on the output shaft which really is
too small for the load.    I suggested that replacing the tail housing with
a custom built housing and using a specially designed prop hub designed such
that a bearing supported the prop hub itself rather than running on the
small shaft of the transmission......
    I just was visiting the Great Plains Aircraft site and happened to look
at their "Force One" prop hub.    This hub fits the VW crankshaft, and
provides an enlarged bearing surface as I suggested in the other
application.   Proper support of the prop hub could unload the actual
transmission shaft from gyroscoping loads pretty much completely and make
this redrive a workable alternative for some people.....   An extended hub
with a double row bearing used with a custom tail housing could easily do
the job......  I question the life expectancy of a transmission running in
2nd gear continuously though.... bearing side loads would probably result in
fairly short bearing replacement on the countershaft and mainshaft bearings,
and without a doubt heat would be a problem.......  requiring some pretty
damn good lubricant / coolant.

                      H.W.

I agree Howard.

Paul Lamar
 
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