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Bill, FWIW, the VAM muffler built by Ed did not have the center tube. It was just a hollow cylinder with a two inch hole in either end. We could not figure out how it was supposed to work but discussions about it soon led to the question "what if we run a tube through it." At that point we thought we had really come up with something that might work. ...The rest of the story you already know.
On Thursday, June 30, 2005, at 01:32 PM, wrjjrs@aol.com wrote:
Jerry, Yes it was a discussion of a occurance on the "other list". Prior to my joining Flyrotary I did a muffler layout to reduce the temp of the exit gasses. It was a tangential design with a center tube. Jerry's system is an outgrowth of the original layout. (Totally with my agreement) Ed Kleppis did a muffler from the original picture, and took it to Tracy's gathering to try it out. It didn't fit on Tracys test stand with the tail pipe so they ran it without it. PL then said it's LOUD. Of course it would be without a tail pipe. It might have been with a tail pipe but we won't know. I still think the idea has merrit but several areas are kinda critical. I will attach an old jpeg. If anybody is interested I go over the specifics. BTW the layout is for a 20B of course that's why the 3 holes! The hole in front needs a inlet or blast tube for the cool air feed.
Bill Jepson
-----Original Message-----
From: Russell Duffy <13brv3@bellsouth.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, 30 Jun 2005 12:57:07 -0500
Subject: [FlyRotary] Re: P Ports working on dyno
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Bill, the muffler is "optically dense." The "tailpipe" cannot be seen by the exhaust ports. I wish Paul had tested a little more and given me more information. A number of people want this muffler but I have declined to build more until it could be tested properly. Even Paul is telling Bob White to change nothing until he hears it for himself. I need to finish my engine and put it on my own dyno. Jerry
Hi Jerry,
I've been trying to follow this, but I think you guys must be referring to a post on the PL list. Did he just bolt it on and listen to it, then take it off without actually doing a dyno pull on it? That would be a bummer.
If you're going to discuss it here, could you post the whole message you're commenting on, so the rest of us can follow along? Of course, you could also hold this discussion on the other list, or at least "try" to :-)
Cheers,
Rusty
<tan_muff_oa_sect.jpg><tan_muff_outside.jpg> Homepage: http://www.flyrotary.com/
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