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From: "Al Wick" <alwick@juno.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2957993@logan.com>
In-Reply-To: <list-2957993@logan.com>
Subject: Re: [FlyRotary] Re: Mistral Crash Analysis
Date: Mon, 9 Jun 2008 07:15:26 -0700
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> So, Al, why don't you post a sketch/drawing of your muffler design and 
> give us some details - dimensions/materials etc.  You design may be the 
> answer someone has been looking for.

My muffler had two desireable features.
1) Having two outlets means it can't get plugged up like the mistral. So 
that really increases your safety margin.
2) It wasn't welded in place. The inlets were slip fit to the header. That 
worked real well. Although towards the end of the 230 hours, I was starting 
to see wear of the mild steel. The slip fit eliminates all the forces from 
the two headers expanding and contracting.

I don't think my design had any redeeming value otherwise. It was pretty 
cheesy design.... a flat plate of ss wedged inside the canister. The SS had 
holes drilled in it of various sizes. Neils muffler way more robust. BTW, I 
call it "my design" but most of it based on a text discription from another 
builder.

-al wick 

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