> > Hans Conser wrote:

 > >
 > > >
 > > > The big problem with doing a bell housing casting is the pattern
 > > > is too large for the 3D machine. I would have to pay big bucks to
 > > > have the pattern made. the foundry can do .140 wall and I will soon
 > > > have some parts with about that wall thickness.
 > > >
 > >
 > > Paul, could you do sections in the 3D machine and then assemble them?
 >
 > I am looking into it.
 >
 > Paul Lamar

 Sorry, but I haven't been following this thread for a while.  How big is the
 largest diameter on the bell housing?  The last time I looked at the
 drawings, it looked like a relatively easy pattern to make: lots of
 symmetry, and something that could be turned on a lathe pretty easily.  No
 hand carving at all.  I need a good Christmas project!

 Tom Kendall

Largest diameter is about 15 inches for the bolt flange.

Here is what I have come up with so far. The flat lower sides
can be used to bolt on your fabricated rubber bushing brackets
of choice. This give a maximum amount of flexibility as it
seems nobody can agree on just how wide they want their rubber
bushings to be. It is rather more complicate inside as various
and assorted ribs are required to provide support for Tracy's
PSRU.

What does everybody think?

Paul Lamar

Looks like a very good idea to me.  Note,  the bolt flange does not
have a constant radius.    Jerry

Tailwind & Rotary Engine Support

http://www.j-winddesigns.com

mailto:j-winddesigns@thegrid.net

I am not sure what you mean by that. The Ross does and works
well. There is a sheet steel cover on the top of the end housing 
that was used for a starter mounting years and years ago.
Finn came up with the idea of bolting on an extruded aluminum
angle and then bolting the angle to the Ross bolt
flange. Really strengthens the connection between engine
to bell housing and better distributes the stress in the 
bell housing itself.

Paul Lamar
 
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