Mailing List flyrotary@lancaironline.net Message #44695
From: Mark Steitle <msteitle@gmail.com>
Subject: Re: [FlyRotary] Muffler Design
Date: Wed, 7 Jan 2009 14:28:42 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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John,
 
The Moroso Spiral Flow muffler design what I tailored my first muffler after.  I wasn't very happy with the results.  First, it wasn't very quiet.  Second, it couldn't take the severe pounding.  And third, I couldn't keep it bolted in place inside the down pipe.  The bolt kept melting and cracks developed around the bolt holes.  I put a doubler around the bolt holes and went to an SS bolt.  That seemed to correct those two problems, but as I said, it didn't do a very good job at quieting the rotary's bark.  So I switched to the Hushpower II, with limited success.
 
Mark S. 

On Wed, Jan 7, 2009 at 12:38 PM, John Downing <downing.j@sbcglobal.net> wrote:
Moroso makes a spiral flow muffler, something on the design that Ed had.  The only thing is that it doesn't come in SS.  An internal picture is show in Jeg's hp catalog.  JohnD

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