kevin lane wrote:

it ain't pretty but this muffler has survived 7 years of racing behind a  NA rotary engine.  the
core is about 4" s/s, maybe 1/4" wall with thousands of 1/8" holes in it, just like a screen.  the
roll is the stainless wool used to repack.  it will be repacked to the depth of the outside
casing.
Kevin Lane  Portland, OR
e-mail-> n3773@attbi.com
web-> http://home.attbi.com/~n3773

Good thing the inner tube is 1/4 inch wall. Typical muffler tubing with holes 
is eaten alive by the rotary. I would not be a bit surprised if the SS wool
was not turned to a lump of SS slag in the bottom of the muffler :)

The best mufflers IMHO for the rotary have nothing in them. The pulses
just go in and spin around inside an empty can. The reason this works
is all the outside metal gets a chance to cool in contact with the surrounding
air. Any metal totally inside the can does not have that advantage.  
A square or rectangular exit pipe should also help according to the Russians. 
IMHO that would be a minimum weight design.

BTW I know you are handicapped by having to use Microsoft products (:)) but is
there some way you can limit the size of the jpgs you send? I used the public
domain program xv to reduces the size and compress the color content. xv
may only run on Linux/unix. The two jpgs you sent were about 400K each.
Running them through xv reduced them to 100K. The size was only reduced
10%. Most of the savings was in the compression of the color content.
As you can see they look almost indistinguishable from the originals except
for the size.

Paul Lamar
 
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