12 b

   Paul, looking at the Ross PSRU pics, has there been any failures at the ring gear to
   output shaft weldment ?

   Steve Carlisle

   Not that I have heard but the HP was quite limited. That was 20 years ago.

   There was a Ford stock bulkhead  that was inserted into the ring gear and that had a
   spline the prop shaft fit in. In those days it was not powdered metal.

   I don't know how Ross fastened the prop shaft to that bulkhead. Unlikely he used a mating
   spline. It would not surprise me if it were  welded. The prop shaft was larger in
   diameter than any Ford shaft being around 2 inches.

   That was not the correct connection anyway. That limits the reduction to somewhere around
   2 to 1 and rotate in the wrong direction.

   The prop would then limit the engine RPM to around 5000 RPM and
   that in turn would limit the HP to well under 180 HP. Probably around 150 HP.

   Another factor is ....in those days P-ports were not common further limiting the HP.

   Paul Lamar


   Paul, thanks again,


Steve Carlisle


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