S--T George....I must have blinked and missed something!!!!.....I was
wondering why you were so quiet there for a short time.....Evidently you

WERE

UP TO GOOD ;)
Believe it or not, one of my suggestions for the production pieces was

for

you to round off the 2 bottom corners of the original Bellhousing POC

for

weight savings and esthetics.....Really very glad to see you're right on

top

of the Ball :)

Now hold off on making the Mold until I finish typing this posting

please.

Comments:

-Excellent idea on the stiffening ring Paul. I would put a draft taper

on the

outer diameter. Will also cut the weight of the ring by 35-40%

-On the wall thickness for the PSRU's mounting thru hardware I would

make

that .200 inches thk. (5mm)

-The 5 upper and 3 lower support Ribs must go around the edge transition
radius for a height of at least .500 inches (13.7mm) and meet up with

the

perimeter Flange Ribs. This will stiffen that drum skin very nicely and

makes

it homogenous in strenth at a very small weight penalty. A BIG bonus,
especially for the 20B crowd (Are you listening Cosmans) ;-)

My comment for now is, I LIKE IT, I LOVE IT..Very Schmooth (Shiek &

Smooth)

DO NOT BEGIN fabrication until we finish looking at it and we hear the
subscriber's comments....Are you listening George??? Put down that tool

this

instant!!! :-)

                                              Butch

Butch,
Reading you loud and clear - I'm just relieved to get to this stage.

As I thought my ribs are a little overkill at 27 mm at the apex, I will do a
profile drawing of the ribs  and get your comments Butch!

BTW I don't like the stiffening ( 40 mm face) ring approach as it adds a
great deal more complexity and machining. This would also have to be tapered
and adds to much weight IMHO.

Hey anyone want a prototype which is very strong going at well below cost
price - after I've finished with it !! ?
George (down under)

No machining required on the face ring George. The ID of the face ring as cast clears
Tracy's PSRU. Yes it does make the pattern trickier but the weight savings
are significant as it does away with most of the 180 mm diameter 15 mm thick center plate.
I suggest you find somebody with a lathe and taper it inside and outside for draft.
Then bond or screw it to the rest of the pattern. It is only 1.6 inches high.
If you going to complain about it I will turn one out of aluminum myself and ship
it to you :)

Paul Lamar
 
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