Joe Hull
Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)
Redmond (Seattle), Washington
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of the mallorys
Sent: Friday, August 25, 2006 1:41
PM
To: Rotary motors in aircraft
Subject: ***SPAM*** [FlyRotary] Exhaust
system
I've looked back through the
archives, and seen lots of different ideas for exhaust systems. But no
real definitive answers.
There is the Cool tube exhaust
that has very short pipes,like Bob White
posted.
There is the medium length, no
muffler system like Buly has or like Joe Hull has mocked
up.
There is the really long tubes
with muffler hanging under belly like Tracy has.
Do we know what the correct length
tube is to tune the exhaust for our RPMs? Does this length include the
muffler?
It appears the diameter most used
is from 1.5 to 2".
What about the different
mufflers? I only found two mufflers named in the archive that guys are
happy with, the Flowmaster Hushpower II, and the Moroso Spiral Flow
Racing Mufflers. Last year at Shady Bend, Monti talked about noise
levels and testing different mufflers and pipes. Are there ant results
from that?
I'm ready to start mocking up my
exhaust, so am seeking the collective wisdom of the
group.