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Date: Thu, 02 Dec 2004 21:08:25 -0600
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: New Muffler Design
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paul wrote:

>Thanks for the info, Ed....One point of interest is that I have the stock
>cast iron manifold inbetween the engine and my tailpipe. It would seem that
>the cast iron manifold is absorbing a lot of impulses, because everyone who
>has heard my engine run states that it is not that loud.  Perry Mick
>mentioned that he has a standard exhaust pipe following his cast iron
>manifold as well, and has had no problems with it in the few hundred hours
>he has flown with that setup.  (He told me that when I was inquiring about
>the need for stainless exhaust pipe after the cast iron manifold).  Don't
>know how much energy the cast iron absorbs, but it definately absorbs the
>heat so the pipe doesen't get as hot.  Curious minds want to know.  Take
>care.  Paul Conner
>

Hey Paul,

It must be a lot louder in your cockpit than it is on the ramp when that 
thing's running. If it were mine & I found that it was making adequate 
power with the current manifold, I would fly & enjoy. I found the sound 
your plane makes quite pleasing, & I don't like loud airplanes at all. 
Go Fly!

Charlie