X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from eastrmmtao05.cox.net ([68.230.240.34] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1348869 for flyrotary@lancaironline.net; Fri, 25 Aug 2006 18:08:24 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.34; envelope-from=candtmallory@cox.net Received: from eastrmimpo01.cox.net ([68.1.16.119]) by eastrmmtao05.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060825220742.OHIF7951.eastrmmtao05.cox.net@eastrmimpo01.cox.net> for ; Fri, 25 Aug 2006 18:07:42 -0400 Received: from yourd0f670b45a ([68.1.121.163]) by eastrmimpo01.cox.net with bizsmtp id EN7f1V00P3XdHt80000000 Fri, 25 Aug 2006 18:07:39 -0400 Message-ID: <003401c6c892$e3defce0$a3790144@yourd0f670b45a> From: "the mallorys" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: ***SPAM*** [FlyRotary] Exhaust system Date: Fri, 25 Aug 2006 17:07:43 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0031_01C6C868.FAF39820" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 This is a multi-part message in MIME format. ------=_NextPart_000_0031_01C6C868.FAF39820 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks, I'll search with his name. Chris ----- Original Message -----=20 From: Joe Hull=20 To: Rotary motors in aircraft=20 Sent: Friday, August 25, 2006 3:49 PM Subject: [FlyRotary] Re: ***SPAM*** [FlyRotary] Exhaust system Check for posts by Lynn Hanover - he's called out the exhaust lengths = and diameters a bunch of times (I can't remember exactly otherwise I'd = parrot it here for you).=20 =20 Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)=20 Redmond (Seattle), Washington =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of the mallorys Sent: Friday, August 25, 2006 1:41 PM To: Rotary motors in aircraft Subject: ***SPAM*** [FlyRotary] Exhaust system =20 I've looked back through the archives, and seen lots of different = ideas for exhaust systems. But no real definitive answers. =20 There is the Cool tube exhaust that has very short pipes,like Bob = White posted. There is the medium length, no muffler system like Buly has or like = Joe Hull has mocked up. There is the really long tubes with muffler hanging under belly like = Tracy has. =20 Do we know what the correct length tube is to tune the exhaust for our = RPMs? Does this length include the muffler? =20 It appears the diameter most used is from 1.5 to 2". =20 What about the different mufflers? I only found two mufflers named in = the archive that guys are happy with, the Flowmaster Hushpower II, and = the Moroso Spiral Flow Racing Mufflers. Last year at Shady Bend, Monti = talked about noise levels and testing different mufflers and pipes. Are = there ant results from that? =20 I'm ready to start mocking up my exhaust, so am seeking the collective = wisdom of the group. =20 Chris ------=_NextPart_000_0031_01C6C868.FAF39820 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Thanks, I'll search with his=20 name.

Chris

----- Original Message -----
From:=20 Joe Hull=20
To: Rotary motors in = aircraft

Sent: Friday, August 25, 2006 = 3:49=20 PM

Subject: [FlyRotary] Re: = ***SPAM***=20 [FlyRotary] Exhaust system

Check for = posts by=20 Lynn Hanover =96 he=92s called out the exhaust lengths and diameters a = bunch of=20 times (I can=92t remember exactly otherwise I=92d parrot it here for = you).=20

Joe = Hull

Cozy Mk-IV N31CZ (65 hrs - = Rotary 13B NA)=20

Redmond (Seattle), Washington

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of the mallorys
Sent: Friday, August 25, 2006 = 1:41=20 PM
To: = Rotary motors in aircraft
Subject: ***SPAM*** [FlyRotary] = Exhaust=20 system

I've looked back through = the=20 archives, and seen lots of different ideas for exhaust systems. = But no=20 real definitive answers.

There is the Cool tube = exhaust=20 that has very short pipes,like Bob White=20 posted.

There is the medium = length, no=20 muffler system like Buly has or like Joe Hull has mocked=20 up.

There is the really long = tubes=20 with muffler hanging under belly like Tracy = has.

Do we know what the = correct length=20 tube is to tune the exhaust for our RPMs? Does this length = include the=20 muffler?

It appears the diameter = most used=20 is from 1.5 to 2".

What about the different = mufflers? I only found two mufflers named in the archive that = guys are=20 happy with, the Flowmaster Hushpower II, and the Moroso Spiral = Flow=20 Racing Mufflers. Last year at Shady Bend, Monti talked about = noise=20 levels and testing different mufflers and pipes. Are there ant = results=20 from that?

I'm ready to start = mocking up my=20 exhaust, so am seeking the collective wisdom of the=20 group.

Chris

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