X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.12.137.6] (HELO imo-m25.mail.aol.com) by logan.com (CommuniGate Pro SMTP 5.2.11) with ESMTP id 3429491 for flyrotary@lancaironline.net; Fri, 16 Jan 2009 11:30:49 -0500 Received: from WRJJRS@aol.com by imo-m25.mx.aol.com (mail_out_v39.1.) id q.cb0.3742c2ec (37553) for ; Fri, 16 Jan 2009 11:30:41 -0500 (EST) Received: from smtprly-db01.mx.aol.com (smtprly-db01.mx.aol.com [205.188.249.152]) by cia-mb03.mx.aol.com (v121_r5.5) with ESMTP id MAILCIAMB032-5bc84970b62028b; Fri, 16 Jan 2009 11:30:28 -0500 Received: from MBLK-M10 (mblk-m10.mblk.aol.com [64.12.136.43]) by smtprly-db01.mx.aol.com (v121_r5.5) with ESMTP id MAILSMTPRLYDB017-5bc84970b62028b; Fri, 16 Jan 2009 11:30:24 -0500 References: To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] DNA Muffler Date: Fri, 16 Jan 2009 11:30:24 -0500 X-AOL-IP: 66.253.96.220 In-Reply-To: X-MB-Message-Source: WebUI MIME-Version: 1.0 From: wrjjrs@aol.com X-MB-Message-Type: User Content-Type: multipart/alternative; boundary="--------MB_8CB460EDE5B8D14_978_D5E_MBLK-M10.sysops.aol.com" X-Mailer: AOL Webmail 40627-STANDARD Received: from 66.253.96.220 by MBLK-M10.sysops.aol.com (64.12.136.43) with HTTP (WebMailUI); Fri, 16 Jan 2009 11:30:24 -0500 Message-Id: <8CB460EDB84636D-978-6A8@MBLK-M10.sysops.aol.com> X-Spam-Flag:NO ----------MB_8CB460EDE5B8D14_978_D5E_MBLK-M10.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" Mark, This is as good a solution as I have seen. The biggest advantage being the "cross bars" are supported by the tube. All solid parts is also good. Bill Jepson -----Original Message----- From: Mark Steitle To: Rotary motors in aircraft Sent: Fri, 16 Jan 2009 6:05 am Subject: [FlyRotary] DNA Muffler Does anyone on the list?have any?real-life rotary experience with?the DNA Gen II muffler (http://www.dnamufflers.com/DNA/main_DNA.html)?? It is an interesting design in that it has no packing material to burn out.? Instead, it utilizes ladder-rungs, which they call "internal sound diffusers",?which resemble a chain of DNA down through the center of the muffler body, which is made of 304 SS.? Their web site claims that the racers use them with great success.? From speaking with a sales rep, they claim there the rotary crowd uses them too.? I'm considering purchasing one of their FULL THROTTLE COLLECTOR mufflers (P/N 1040), but thought I would check?to see if anyone else has used this style muffler.? This muffler has a 3" inlet/outlet with a 4" body.? So it is compact enough to fit inside?my cowl.? My exhaust header has a 3" swivel joint, so it should be a good fit.? ? Mark S. ----------MB_8CB460EDE5B8D14_978_D5E_MBLK-M10.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii" Mark,
This is as good a solution as I have seen. The biggest advantage being the "cross bars" are supported by the tube. All solid parts is also good.
Bill Jepson


-----Original Message-----
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Fri, 16 Jan 2009 6:05 am
Subject: [FlyRotary] DNA Muffler

Does anyone on the list have any real-life rotary experience with the DNA Gen II muffler (http://www.dnamufflers.com/DNA/main_DNA.html)?  It is an interesting design in that it has no packing material to burn out.  Instead, it utilizes ladder-rungs, which they call "internal sound diffusers", which resemble a chain of DNA down through the center of the muffler body, which is made of 304 SS.  Their web site claims that the racers use them with great success.  From speaking with a sales rep, they claim there the rotary crowd uses them too.  I'm considering purchasing one of their FULL THROTTLE COLLECTOR mufflers (P/N 1040), but thought I would check to see if anyone else has used this style muffler.  This muffler has a 3" inlet/outlet with a 4" body.  So it is compact enough to fit inside my cowl.  My exhaust header has a 3" swivel joint, so it should be a good fit. 
 
Mark S.
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