X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in04.adhost.com) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1348788 for flyrotary@lancaironline.net; Fri, 25 Aug 2006 16:50:31 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (tide533.microsoft.com [131.107.0.103]) by mail-in04.adhost.com (Postfix) with ESMTP id A9CD6E39B9 for ; Fri, 25 Aug 2006 13:51:01 -0700 (PDT) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: ***SPAM*** [FlyRotary] Exhaust system Date: Fri, 25 Aug 2006 13:49:30 -0700 Message-ID: <00ab01c6c888$017bb5f0$bc40379d@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AC_01C6C84D.551CDDF0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcbIhupgVbhXSkvISV+mqmxn88DopwAAOfQw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_00AC_01C6C84D.551CDDF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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). Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA) Redmond (Seattle), Washington _____ 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 I've looked back through the archives, and seen lots of different ideas for exhaust systems. But no real definitive answers. 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. Do we know what the correct length tube is to tune the exhaust for our RPMs? Does this length include the muffler? It appears the diameter most used is from 1.5 to 2". 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? I'm ready to start mocking up my exhaust, so am seeking the collective wisdom of the group. Chris ------=_NextPart_000_00AC_01C6C84D.551CDDF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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). =

Joe = Hull

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

Redmond (Seattle), Washington

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

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

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.

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

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

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?

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

Chris

------=_NextPart_000_00AC_01C6C84D.551CDDF0--