Mailing List flyrotary@lancaironline.net Message #43150
From: Al Wick <alwick@juno.com>
Subject: Re: [FlyRotary] Re: Mistral Crash Analysis
Date: Mon, 9 Jun 2008 07:15:26 -0700
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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