Jerry Hey wrote:

Paul,   On one drawing of the PRSU adaptor plate the ribs between the
pockets are 0 .5" wide.  On the other  drawing they are 1.0" wide.

The  inner bolt circle on one drawing shows a bolt lined up on two
o'clock rib.   On the other drawing this is rotated clockwise and a bolt
is lined up on the three o'clock rib.

The rib positions are not important.

Can we assume that the starter hole and attaching bolts will be the same
in every case?  If so we need the numbers or if not, then what do you
suggest we do?    We could punch a small hole to center the starter

There are several different starters. If you put in the large starter pilot hole
a person could drill his own starter bolt holes depending on which
starter he wanted to use. I think they all have the same pilot hole
diameter.

Are the outer bolts counterbored?    I don't understand the comment the
"wrap the spool  in 1/8" aluminum."   Also, don't understand the comment
"Y Drill Hole."

Two of the aluminum spools are counter bored for the hollow dowel pins
used in the Mazda rear end housing. The 3/16 aluminum wrap is used
instead of Tracy 1/2 inch plate spacers which are quite heavy and 
crude looking :-)>

The 3-1/8" wide 3/16" thick aluminum sheet wrapped around the outside of 
the spacers takes all the sheer loads due to engine torque. You could use 
steel spacer and .040 steel sheet in effect fabricating a bell housing of 
sorts that encloses the flywheel/ring gear. Again this is mainly a cosmetic
issue.

  We will be ready to run a test of the CNC  program once we  understand
these issues.   After a simulation run,  we will cut a sample out of
butter board which I will bring to Santa Paula.

Also,  what level of finish would you like to see.    The finer the
finish,  the more it will cost but I think some additional expense for a
beautiful part is o.k.                 Jerry

We had a big discussion about the stiffness of the plate so I made
the ribs wider to make Tracy feel better. The pockets are strictly
cosmetic as there is little weight saving. We would be lucky to get
two pounds out of it. On the other hand it will look trick
and much more professional and therefore will sell more rotary engines :-)>
The finish is up to you but that too is not important.

We don't want our engines to look like where they came from.....mainly the
junk yard :-)> We want them to look high tech and expensive :-)>

Paul Lamar
 
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