http://www.corsaperf.com/arsctech.htm


I talked to these people a few years back at Mid Ohio. The mufflers have
a straight through tube, that works OK on piston engines but probably
not on a rotary.

However they use coaxial containers facing each and interlaced with
each other to produce differing volume chambers to manage, or time
reflected pressure waves in order to help cancel some of them. They show
a round muffler in their flyer, but in the Hot Rod shop the cut away
muffler is a rectangular piece. The elements are far too thin to survive
a rotary, but the idea is interesting.

On another note, I have been thinking about space and heat in the
cowling that could be helped if the muffler were outside in the wind.
The design would have to be a bit more streamlined, but it is possible
to do that,
and have an effective muffler. I was thinking (instead of working on any
of the hundred projects) that if the muffler were supported by the
exhaust tube, extended through the skin by a rigid clamp of some sort,
then a stainless flex pipe to the collector could be used so as to allow
additional room for other items in the cowl and for some movement of the
engine.

The cooling tube and the fish tail could also be included. Here are two
crude drawings to get the complaining started. I will draw more.

Lynn E. Hanover

Lynn,
That looks like mine and Bill's design, I put up recently, and yes you could
have it out in the airstream. I think the secret is deflecting the sound
waves and we use two back to back cones to achieve this and to avoid and
bare edges, that could be burned away.
George ( down under)


More grist for the mill.

Any number of methods could be used to support the muffler.

Lynn E. Hanover



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