Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 776195 for flyrotary@lancaironline.net; Tue, 08 Mar 2005 21:48:19 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.rr.com [24.74.185.127]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j292lSLw024494 for ; Tue, 8 Mar 2005 21:47:29 -0500 (EST) Message-ID: <002301c52452$59d00390$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Anechoic Muffler Date: Tue, 8 Mar 2005 21:47:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C52428.70C33420" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C52428.70C33420 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable No, Tom, I had not see anyone use the disc configurations that I used = which were "designed" to appear solid (more or less) to the sonic wave = but permit gas flow through them. I have seen discs with holes used = but they permit the sonic FAW wave through as well as the gas. At least = that is my assumption. If you recall the discs looked like paddle = wheels with the blades bent less than 45 deg. The idea was that it = would still look pretty solid to a sound wave but the gas molecules = could find plenty of room to go around the face of the blades and = continue the flow. I think the idea has sufficient merit to try it one more time without = spinning discs to see what the results would be. Ok, I've shown you = mine now its your turn to show me yours {:>) Ed A ----- Original Message -----=20 From: Tom=20 To: Rotary motors in aircraft=20 Sent: Tuesday, March 08, 2005 9:34 PM Subject: [FlyRotary] Re: Anechoic Muffler Hi Ed,=20 Yes, I remember your muffler experiment. Let me ask you, is that = something you had seen before? Issues with my concept was weight, = manufacturability, and it being a heat sink. But in the last few = minutes I did what I often do. I came up with another iteration which = deals nicely with those and is so simple that anybody with welding gear = could make one in their shop. It just looks a little funny.=20 Tom ------=_NextPart_000_0020_01C52428.70C33420 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
No, Tom, I had not see anyone use the = disc=20 configurations that I used which were "designed" to appear solid (more = or less)=20 to the sonic wave but permit gas flow through them.  I have seen = discs with=20 holes used  but they permit the sonic FAW wave through as well as = the=20 gas.  At least that is my assumption.  If you recall the discs = looked=20 like paddle wheels with the blades bent less than 45 deg.  The idea = was=20 that it would still look pretty solid to a sound wave but the gas = molecules=20 could find plenty of room to go around the face of the blades and = continue the=20 flow.
 
I think the idea has sufficient merit = to try it one=20 more time without spinning discs to see what the results would be.  = Ok,=20 I've shown you mine now its your turn to show me yours = {:>)
 
Ed A
----- Original Message -----
From:=20 Tom
Sent: Tuesday, March 08, 2005 = 9:34=20 PM
Subject: [FlyRotary] Re: = Anechoic=20 Muffler

Hi Ed,
 
Yes, I remember your muffler experiment.   Let me ask = you, is=20 that something you had seen before?     Issues = with my=20 concept was weight, manufacturability, and it being a heat=20 sink.   But in the last few minutes I did what I often = do.  I=20 came up with another iteration which deals nicely with those and is so = simple=20 that anybody with welding gear could make one in their = shop.   It=20 just looks a little funny.
 
Tom


 
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