Mailing List flyrotary@lancaironline.net Message #41047
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Fw: [FlyRotary] Re: Dennis' Muffler
Date: Wed, 9 Jan 2008 16:36:09 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Well, you could be correct, Mark. 
 
 However, even looking at the exploded view of the one you posted, it still looks to me that the only packing shown is the insulation packing  (looks like approx 1/2" thick") around the peripheral of the shell. 
 
 Now that is the resonator, while I have the full up muffler - and I carefully checked for packing because my experience has shown no sound absorbent packing will last more than a few hours with my engine.  I could detect no packing material by shinning a light down the ends - but, that does not prove its not there.  Just see no evidence of it.
 
I even tried some 2000F rated ceramic material for  packing - it withstood the heat just fine, but the pulses blasted it into pieces within 1 hour of flight time (perhaps even less).  13Bs without the turbo block or the Renesis may be kinder {:>)
 
My 0.02
 
Ed
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