I tried again and I got right in. Don't know what happened the first two times.

http://www.bluemtn.com/greg/aircraft.html 


"Exhaust is really simple -- a stainless J pipe about 8 inches long from the turbo out to the atmosphere.  To everyone's surprise it's quieter than a
Cessna 172.  The turbo acts as a Hemholtz resonator and is one sweet acoustic low pass filter.  I was even worried about loud, but 722 is one of the
quieter planes on the ramp.  In the air, things get louder.  The turbo changes the rotary's exhaust note to something between Ocean Racer and
Forklift.  Note the Mountain Dew bottle in the exhaust stack in the pic below.  I really need to make one of those red Remove Before Flight tags for it"

Wonderful to find out I will not need a muffler on my turbo.

Paul Lamar
 
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