It is almost ready to go into the foundry.
Been working on Tom Kendall's  pattern to add material in the flange
for the late 13B version, give a bit more turbo clearance and reduce
the weight. I think I may have got about a pound out of it. I'll know
more when we have some cast parts.  Here is a picture of the pattern prior
to coating the modified areas with lacquer.

Paul what are you using to make the core from?
I assume this is a sand casting?
Royce

It is a sand casting. The foundry tells me if they told me the
secret formula for the sand cores they would have to kill me :-)
they claim it took them 30 years to develop it. They sure do nice
work. Just look at this three inch .140 wall elbow for turbo-charging plumbing.
This is a sand cast work of art.
 
Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site. Copyright 1998-2002 All world wide rights reserved.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org