Jerry Hey wrote:

I have to laugh at myself because this is the fifth iteration on the
exhaust system and each time I thought I finally had it right.   Some
of those exhaust systems only lasted a day or two before the inevitable
realization that they were not so wonderful after all.  So here is my
latest version in this seemingly endless struggle.  I like it but I am
not claiming that it is "IT."

  One goal was to do a better job of routing the exhaust gasses to
insure that they tumbled inside the muffler.   Secondly,  I wanted to
get the exhaust pipe down to the belly of the airplane.    Thirdly,  I
wanted to have enough room for the radiator/oil cooler combo.   The dog
legged, rectangular  exhaust pipe accomplishes all three objectives.
The pipe is 1.75 x 4 inches (7 sq in.)  Room for the radiator/oil
cooler can be increased as required by lengthening the angled portion
of the exhaust pipe.  At the closest point, the exhaust pipe clears the
engine mt by one inch.      Jerry

You did not give me a chance to do a 3D on your new muffler:)

Come on Jerry get with it. Do a signature file.
I know you are filthy rich and you don't need any more money
but some people would like to try talking you into making some parts
for them. I am joking. Jerry builds motor mounts for rotary engines
among other things like complete Tailwind fuselages. He does nice work.

OK folks here is Jerry's email address since he won't tell you himself :)

Jerry Hey <j-winddesigns@thegrid.net>

Sorry Jerry :)

Paul Lamar

Jerry,
Is the exhaust Inconel and how do you get those donut ends for the exhaust,
do you press them yourself?
I'm wondering if flat would do for a home made trial ?
Those PP throttle bodies look good, I am waiting for the results.
George (down under)

 
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