Subject: Mag bell housing
From: Rotary Engine
Date: 10/7/2006, 5:58 AM
To: AA-me


Jarret I got it in SW but I forgot how to fillet.
Give me some hints :)

Tony you can send these off to Dave for his comments.

-- 
Paul Lamar ...No rotor no motor.


What do they say about better late than never??  Sorry Paul, I was off in
Calgary for a week for a convention..  I'm now just wading through my
emails [over 700 of them] I looked at your file and see what your problem
is. You'll want to convert your bell housing into 1 part. Currently there
are 20 bodies in this model, some of the bodies can be hidden for now while
you combine the major housing body. I've attached a passel of pictures to
hopefully clarify the process of what I did to get the fillets. I've added
some other features as well just to show some of the other tools that might
be used in designing something like this. It's also worth noting I didn't
take actual dimensions into consideration to much.. it was more the TLAR
[that looks about right] engineering..

Feel free to ask more specific questions if you feel I've missed
something..

Hope that helps..

Jarrett

Thanks a bunch Jarrett. I can see I was in the wrong mode.
Got to be in the part mode.

Jarrrett sent a bunch of stages. These are only four of those
that he sent. In Solid Works "combine" is used instead of
"union" in Rhino. In Rhino there is no "draft".
The filleting works well while in Rhino it may or may not
work. Also the filleting in SW is far more sophisticated.

The last jpg is the final part.

Paul Lamar ...No rotor no motor.

I drew the parts in Rhino, exported them to SW, drafted, filleted
and shelled them. Exported them back to Rhino, added the flange
and rendered it. Whew! It needs a few more internal ribs.

It would weigh about 10 pounds in aluminum with a .2 inch
wall and about 6 pounds in magnesium. Tracy's current set up is
about 8 pounds for the adapter plate, spacers and bolts.
The 4130 steel schertz beam 30 inches long
weighs about 5.3 pounds for a total current weight of around
13.3 pounds. A mag casting would be about half that and
an aluminum casting would give only a 3.3 pound saving.
However the mold for the casting is going to cost
a lot so the price of ten or 15 will be about $500
or $600.

How many people would be interested in a mag casting?

Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.