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Message-ID: <5cf132c0901071228w78b366b6j477dfbb3876cd951@mail.gmail.com>
Date: Wed, 7 Jan 2009 14:28:42 -0600
From: "Mark Steitle" <msteitle@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Muffler Design
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John,

The Moroso Spiral Flow muffler design what I tailored my first
muffler after.  I wasn't very happy with the results.  First, it wasn't very
quiet.  Second, it couldn't take the severe pounding.  And third, I couldn't
keep it bolted in place inside the down pipe.  The bolt kept melting
and cracks developed around the bolt holes.  I put a doubler around the bolt
holes and went to an SS bolt.  That seemed to correct those two problems,
but as I said, it didn't do a very good job at quieting the rotary's
bark.  So I switched to the Hushpower II, with limited success.

Mark S.

On Wed, Jan 7, 2009 at 12:38 PM, John Downing <downing.j@sbcglobal.net>wrote:

>  Moroso makes a spiral flow muffler, something on the design that Ed had.
> The only thing is that it doesn't come in SS.  An internal picture is show
> in Jeg's hp catalog.  JohnD
>

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<div>John, </div>
<div>&nbsp;</div>
<div>The Moroso Spiral Flow muffler design&nbsp;what I tailored my first muffler&nbsp;after.&nbsp;&nbsp;I wasn&#39;t very happy with the results.&nbsp; First, it wasn&#39;t very quiet.&nbsp; Second,&nbsp;it&nbsp;couldn&#39;t take the severe pounding.&nbsp; And third, I couldn&#39;t keep it bolted in place inside the down pipe.&nbsp; The bolt kept melting and&nbsp;cracks developed around the bolt holes.&nbsp; I&nbsp;put a doubler around the bolt holes and went to an SS bolt.&nbsp; That seemed to correct those two problems, but as I said, it&nbsp;didn&#39;t do a very good job at quieting the rotary&#39;s bark.&nbsp;&nbsp;So I switched to the Hushpower II, with limited success.</div>

<div>&nbsp;</div>
<div>Mark S.&nbsp;<br><br></div>
<div class="gmail_quote">On Wed, Jan 7, 2009 at 12:38 PM, John Downing <span dir="ltr">&lt;<a href="mailto:downing.j@sbcglobal.net">downing.j@sbcglobal.net</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Moroso makes a spiral flow muffler, something on the design that Ed had.&nbsp; The only thing is that it doesn&#39;t come in SS.&nbsp; An internal picture is show in Jeg&#39;s hp catalog.&nbsp; JohnD</font></div>
</div></blockquote></div><br>

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