Lynn,
Regarding your statement, "muffler design is serious business". I couldn't agree more. I was amazed when, on my first "spiral-flow" muffler, I found that the 1/4" bolt that was at the tip of my exhaust downpipe was melted from the heat of the rotary's exhaust... 3' from the exhaust ports. Also, the material around the bolt holes started cracking from the hammering of the supersonic exhaust pulses. It's enough to make one stop and think.
Mark S.
On Tue, Jan 6, 2009 at 10:31 AM, <wrjjrs@aol.com> wrote:
Yes Lynn it is a different system than they were using on the Arrow.
Bill
-----Original Message-----
From: Lynn Hanover <lehanover@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, 5 Jan 2009 5:19 pm
Subject: [FlyRotary] Mistral muffler.
Mark,
Take a look at the newest Mistral pictures. They are using a tangental with a "cool tube" something that I drew several years ago for PL's site. They use a large down pipe with a annular exit around the tube. If you are doing something new it is worth a look. Material is 321 I think.
Bill Jepson
Hopefully it is an improvement on the last years model made by a third party, that decomposed and blocked the outlet, bringing the test plane down.
Muffler design is very serious business.
Lynn E. Hanover
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