George Lendich wrote:

Paul,
I ready to lay up the new bellhousing, what thickness do you want the

top arc flange and bottom (Schertz beam) flange, 10, 12 or

15mm - don't tell me 4mm !
George (down under)

Leave off the bottom Schertz beam and make everything else as thin as

possible.

Just beef up the areas where the bolts go to 13 mm.

The reason is a cast in Schertz beam would not be efficient. It would wind

up

being too heavy. An efficient Schertz beam should look like an I beam.
Not easy to do with a simple casting lacking core boxes.

You may need a few thin internal ribs or gusset here and there around

inside

the rectangular lower section. When you get the pattern done take some

photos not only

from dead  on or directly from behind but hold the pattern at an angle
so I can get a perspective view.

Here is how I suggest you handle the two lower right bolt holes.
This rendering has Tracy's redrive installed.

From the sounds of it you are getting to be a pretty good pattern maker.

If your foundry does good work I might come down there and get
some quotes on some of my stuff. You are in Briz-bin right?

Paul Lamar

Paul,
The secret is that I did a solid pattern first - then took a fibreglass cast
of that when I felt it was right.  Although a fair bit of work in the
original pattern, the rest is fairly easy.
My own thought were that we would need some internal ribs.
Yep, I'm in Brisbane and the foundry is just up the road from my place. My
first job was in a foundry so I have a little background knowledge, which
helps.
Just bear with me for a couple of days as the wife wants some things done -
I don't know why I make these promises.
BTW your always welcome stay here Paul, I tried to catch you when your were
over last time for networking but I figure you were just plain tired.
And yes the foundry, which is only small, does very good work. It seems to
specialise in this sort of small run stuff.
I'm looking at your drawing now.
George (down under)

 
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