Mailing List flyrotary@lancaironline.net Message #50797
From: Mark Steitle <msteitle@gmail.com>
Subject: Re: [FlyRotary] Tangential muffler
Date: Fri, 9 Apr 2010 10:46:48 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al, 

The slotted tube exits through the aft end of the muffler.  It is 2-1/2" the whole way.  I slotted it after I was unable to drill holes through the SS.  Cutting 1" slits was very easy.  After making the cuts, I took a hammer and chisel and made a "V" shaped indent on one side of the cut to increase the exit area provided by each cut and to encourage the exhaust gasses to flow toward the exit.  Seems to be working.  I'll take some sound measurements a little later on.

Mark

On Fri, Apr 9, 2010 at 11:13 AM, Al Gietzen <ALVentures@cox.net> wrote:

I should make it clear that my tangential muffler uses a slotted tube that runs down through the length of the 5" tube.  This tube is also inconel and is welded to both ends, thereby adding strength to the flat ends.  I utilized Lynn's coupling design to allow for movement between the muffler and the engine.  

 

Mark;

This is interesting.  Would you care to give a bit more info – or perhaps provide a sketch? Where is the exit from the muffler? Does the exhaust exit through the slotted tube? How big is the tube?

 

Al


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