Mailing List flyrotary@lancaironline.net Message #24104
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: small muffler suggestions for single rotor?
Date: Sat, 18 Jun 2005 09:29:29 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
 If you consider a container of 6" dia and 24" long physically acceptable, the muffler is built around it. Next, in the single rotor is only one pipe input, this input pipe enters the container tangential on one end. The exit pipe is located on the other end of the container rectanular to the container C/L. The exit pipe must be smaller then the inlet pipe since the gases have less volume because of the energy loss in the container.  
 
Thanks for the great explanation Richard.  This sounds too easy not to try.  About the longest space I have is 18", so maybe I'd try to go with a slightly larger diameter to make up the area.   
 
Do you have any suggestion for the thickness of the metal, and did you use 321, or 304 stainless?  Best I can figure, 304 is probably OK, as long as it's thick enough.   Heck, in cars, they often use mild steel, but quite thick and heavy.  
 
Thanks,
Rusty (post office holding my oil pump hostage)
 
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