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Date: Thu, 8 Oct 2009 18:26:16 -0400
Message-ID: <1ab24f410910081526n6e1273me8f25e8f9c35ce5b@mail.gmail.com>
Subject: RE: Your Muffler
From: Lynn Hanover <lehanover@gmail.com>
To: flyrotary@lancaironline.net
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 Ed,
> Cones are the GO.
>
> Any bare edge will take a battering from the heat and shock waves. Cones
> formed back to back eliminate any edges.
>
> There must be supporting structure for the cones, I've used 1/4" solid
> round bar welded into the exhaust skin.
> George (down under)

Thought must be applied to the idea that eventually the structure will
decompose, and then the pieces thus liberated, will plug the exit and render
the engine a balance weight. As in the Mistral crash.

Perhaps the back to back cones could be installed over some cooling air
holes in the central pipe.
A solid rod just aft of the cones could support the central pipe and help
prevent such a blockage.

My version would have the entire muffler below the cowl in the airstream.
Maybe there would be room for a collector before the muffler so as to
maintain more engine power.

Lynn E. Hanover

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<div>=A0Ed, <br>&gt; Cones are the GO. <br>&gt; <br>&gt; Any bare edge will=
 take a battering from the heat and shock waves. Cones <br>&gt; formed back=
 to back eliminate any edges. <br>&gt; <br>&gt; There must be supporting st=
ructure for the cones, I&#39;ve used 1/4&quot; solid <br>
&gt; round bar welded into the exhaust skin. <br>&gt; George (down under) <=
br><br>Thought must be applied to the idea that eventually the structure wi=
ll decompose, and then the pieces thus liberated, will plug the exit and re=
nder the engine a balance weight. As in the Mistral crash. </div>

<div>=A0</div>
<div>Perhaps the back to back cones could be installed over some cooling ai=
r holes in the central pipe. </div>
<div>A solid rod just aft of the cones could support the central pipe and h=
elp prevent such a blockage.</div>
<div>=A0</div>
<div>My version would have the entire muffler below the cowl in the airstre=
am. Maybe there would be room for a collector before the muffler so as to m=
aintain more engine power.</div>
<div>=A0</div>
<div>Lynn E. Hanover</div>
<div>=A0</div>
<div>=A0</div>

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