Have you considered a side exhaust? Ideal for a rotary
as it gets the heat out lickety split. The tangential muffler
could be in the cowl. Much easier to clean the side of the air
plane rather than the bottom. Neat things can be done
like six small 1-1/4 inch diameter exhaust pipes inline.
That would confuse the heck out of casual onlookers :-)

Paul Lamar

Jerry Hey wrote:

Side exhaust.  When I first joined this list, I looked briefly at the
tangential muffler.  At the time, I did not like the idea of having
the muffler inside the cowl. I thought it  would radiate a tremendous
amount of heat.  Is this a valid concern?  I'll go back to the web
site and have another look.   Jerry

A heat shield formed around it spaced out a 1/2 inch works well.
Perry claims he can touch the heat shield on his stock exhaust
manifold. Really what it is is a radiation shield. 
(No, not nuclear radiation!) :-) Take a look at a stock
Mazda shield and copy it.

As Tracy Crook is fond of saying; "a breeze at the beach will not
stop you from getting sunburned!" (I like that Tracy :-))

Paul Lamar
 
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