Mailing List flyrotary@lancaironline.net Message #30111
From: David Leonard <wdleonard@gmail.com>
Subject: How to attach a Muffler
Date: Sat, 11 Feb 2006 09:54:31 -0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
So I am trying to plan my muffler installation.  I just bought a hushmaster II to hang under the cabin.  I want the exhaust the exit where it currently does mid cowl.
 
The question is how to make the connection.  It seems that if I make rigid connections then I will get fatigue cracks in the exhaust, even if I support the weight of the muffler.  Do the pipes themselves just absorb the vibration of the engine? 
 
I need to use either a slip fit or a v-band clamp to remove the pipe to get the cowl off.  Will either of these provide enough play in the system.
 
 
That seems better in terms of flexibility, but is more costly and will probably let more heat into the cowl, and will need a larger cowl opening (would prefer the slip or v-band joint).
 
Am I worried about nothing?
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