Subject: bellhousing casting plug
From: Rotary Engine
Date: 3/10/2008, 3:32 PM
To: AAA Put this in the To box


> Paul,
>
> Finally getting over this flu. What a nasty bug. The outside
plug for
> the bellhousing just came out of the machine
>
> Inner core going in now. Picture attached of outer plug. Just needs a
> little sanding and polish.
>
> Larry
>
> Thanks Larry. Looking good.
> -- > Paul Lamar ...No rotor no motor.

Larry, what's the mat'l your using there? Is that REN board?

Jarrett  [Look's REALLY good!]

Jarrett,
Not really sure what the plastic is... but it was free, so the price was
right. It is not delrin, but feels more like abs or polypropylene blend.Anyway it's weird stuff with green speckles in it. Seems very tough, so it
should hold up to the casting process well.
Larry

Possibly recycled UHMW? It can come in a dark muddy or yellow color..

So is that the full pattern? Is the interior pocketed out and used as
the mating pattern for the part? [Instead of two patterns?]

Jarrett

Jarrett,
The material was still a mystery... so we did the specific gravity test. It
floats in water, so is most likely recycled UHMW. Unusual color for this,
but almost no other plastic has this density.
Larry

Jarrett,
That is a 2 piece pattern, you can see part of the outside pattern in the
photo of the inside.
Great work Larry, I hope you and Bill get together on some projects.
George ( down under)


The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2007 All world wide rights reserved.