Bill Freeman wrote:

Steve,

After a brief look, it looks like some good ideas.  I would
suggest that the rear mounting plate (I estimate 1/4" or 3/8"
alum plate) is much too flexible.  You will need to add three
brace struts out to the end of the housing, attached directly
to the bolts (via appropriate brackets of course) which go into
the front case.   Glad to see a realistic output shaft design.
Not familiar with the tapered hub sprocket, looks interesting.
Friction is a pretty reliable force, can be great when harnessed
properly.

Bill

Funny you should mention that Bill. I just worked up a
suggested change
for Steve's design. Not that he needs to change the one he
built already.

I find it a brilliant use of off the shelf materials and parts.
I especially like the two pieces of aluminum tubing heat
shrunk together for the
housing. Brilliant idea. Those tapered roller bearings are
canon proof.
I also like the idea of those AN eye bolts. I was racking my
brain on how
to do that on my design. You are a very talented designer Steve.

Here is my suggested change.

Paul Lamar

I did consider making the rear elements in one piece as you have shown.  The
one thing that stopped me, besides the weight of that 5/8" plate, were some
assembly issues.  If the rear plate was made in one piece, with its position
fixed by the alignment of the two shafts, I would have had a hard time
centering the input shaft in the torsion damper while drilling the holes for
attachment to the engine.  If the engine bolt positions were known
precisely, and the back plate CNC machined, it would probably work.  For me,
though, it was easier to make the PSRU completely self contained (and fully
aligned), fabricate the engine adapter, then center the PSRU on the torsion
damper in a separate step.

Steve Rosine

Mustang II/  13B

Yes I can see that now. Fortunately I had Tracy psru plate to use as a template
for making an enlarged version incorporating my motor mounts.

Paul Lamar
 
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