X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.11) with ESMTP id 3429435 for flyrotary@lancaironline.net; Fri, 16 Jan 2009 11:08:54 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta03.mail.rr.com with ESMTP id <20090116160815.EBFO21495.cdptpa-omta03.mail.rr.com@computername> for ; Fri, 16 Jan 2009 16:08:15 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] DNA Muffler Date: Fri, 16 Jan 2009 11:08:18 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01C977CA.BCD16B30" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: Acl3446S3/93iu/ISqOP3+p5VKcelwAEKnjA In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20090116160815.EBFO21495.cdptpa-omta03.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C977CA.BCD16B30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Appears somewhat similar in concept to the SpinTech muffler using baffles/ladders to break up the sound wave front. The thing I would wonder about is whether those ladders which appears to stretch across the diameter of the tube could withstand the pulse pounding from the rotor. My experience with the turbo 13B (with no exhaust splitters) would indicate it might not long withstand that pounding. But, I could be wrong about that. Guess you're going to have to buy one and let the rest of us know, Mark. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Friday, January 16, 2009 9:05 AM To: Rotary motors in aircraft 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. ------=_NextPart_000_0012_01C977CA.BCD16B30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Appears somewhat similar in concept = to the SpinTech muffler using baffles/ladders to break up the sound wave = front.  The thing I would wonder about is whether those ladders which appears to = stretch across the diameter of the tube could withstand the pulse pounding from = the rotor.  My experience with the turbo 13B (with no exhaust = splitters) would indicate it might not long withstand that pounding.  But, I could = be wrong about that.

 

Guess you’re going to have to = buy one and let the rest of us know, Mark.

 

Ed

 

Ed Anderson

Rv-6A N494BW Rotary = Powered

Matthews, NC

eanderson@carolina.rr.com=

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html<= font size=3D2 face=3DArial>

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Friday, January 16, = 2009 9:05 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] DNA = Muffler

 

Does anyone on the list have any real-life rotary = experience with the DNA Gen II muffler (http://www.dnamuffl= ers.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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The message = was checked by ESET NOD32 Antivirus.

http://www.eset.com
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