X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp1.av-mx.com ([137.118.16.57] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3462027 for flyrotary@lancaironline.net; Sat, 31 Jan 2009 10:09:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.57; envelope-from=res12@fairpoint.net Received: from main (dblt-74-209-35-223.gtcom.net [74.209.35.223]) (Authenticated sender: res12@fairpoint.net) by smtp1.av-mx.com (Postfix) with ESMTP id 6E12D290680 for ; Sat, 31 Jan 2009 10:09:04 -0500 (EST) Message-ID: From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] My New DNA Muffler Date: Sat, 31 Jan 2009 09:09:04 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01C98383.9099E910" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_002B_01C98383.9099E910 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable With the inlet and outlet the same size, I would not be surprised if it = does very little noise reduction, if any. Some tests in the past have = shown that a smaller exit makes a considerable difference in sound level = with moderate loss of power.=20 FWIW. Richard Sohn N2071U ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 31, 2009 8:48 AM Subject: [FlyRotary] My New DNA Muffler Hey Guys, My new DNA muffler arrived yesterday so I thought I would post a = couple of pictures with some information and first impressions. It appears to be very well built, all tig welded, and no packing to = burn out. It weighs just under 5#, which is half of what the Hushpower = II weighs, so if it works, I will have reduced my fwf weight by 5#. To = be totally honest, my HPII probably no longer weighs 10# as most of the = innards have long departed the a/c. =20 The model I purchased was the Gen II - Collector Series, p/n 1040. It = has 3" inlet and 3" outlet, with a 4" dia. body. Total length is21", = body length is 15". Literature says that it is good for 1000 hp, so it = may have a chance of lasting at least 100 hrs on my 3-rotor running for = hours at WOT. We'll have to wait and see on the longevity. I have a = decible meter, so I can take some before and after readings. Cost was = $152 with shipping from Canada. I'm going out to the airport this morning to see how well it fits. = More on how well it fits & works later...=20 Mark S. -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG - http://www.avg.com=20 Version: 8.0.176 / Virus Database: 270.10.16/1926 - Release Date: = 1/30/2009 5:31 PM ------=_NextPart_000_002B_01C98383.9099E910 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
With the inlet and outlet the same = size, I would=20 not be surprised if it does very little noise reduction, if any. Some = tests in=20 the past have shown that a smaller exit makes a considerable difference = in sound=20 level with moderate loss of power.
FWIW.
 
Richard Sohn
N2071U
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Saturday, January 31, = 2009 8:48=20 AM
Subject: [FlyRotary] My New DNA = Muffler

Hey Guys,

My new DNA muffler arrived yesterday = so I=20 thought I would post a couple of pictures with some information and = first=20 impressions.
 It appears to be very well built, all tig = welded, and no=20 packing to burn out.  It weighs just under 5#, which is half of = what the=20 Hushpower II weighs, so if it works, I will have reduced my fwf weight = by=20 5#.  To be totally honest, my HPII probably no longer weighs 10# = as most=20 of the innards have long departed the a/c. 

The model I = purchased=20 was the Gen II - Collector Series, p/n 1040.  It has 3" inlet and = 3"=20 outlet, with a 4" dia. body.  Total length is21", body length is=20 15".  Literature says that it is good for 1000 hp, so it may have = a=20 chance of lasting at least 100 hrs on my 3-rotor running for hours at=20 WOT.  We'll have to wait and see on the longevity.  I have a = decible=20 meter, so I can take some before and after readings.  Cost was = $152 with=20 shipping from Canada.

I'm going out to the airport this morning = to see=20 how well it fits.  More on how well it fits & works later...=20

Mark S.

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:  =20 http://mail.lancaironline.net:81/lists/flyrotary/List.html


No virus found in this incoming message.
Checked by AVG = -=20 http://www.avg.com
Version: 8.0.176 / Virus Database: = 270.10.16/1926 -=20 Release Date: 1/30/2009 5:31 PM
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