X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost06.isp.att.net ([207.115.11.56] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTP id 5591082 for flyrotary@lancaironline.net; Sun, 10 Jun 2012 07:52:51 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.56; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-142-87.mco.bellsouth.net[98.85.142.87]) by isp.att.net (frfwmhc06) with SMTP id <20120610115214H06006v7oie>; Sun, 10 Jun 2012 11:52:14 +0000 X-Originating-IP: [98.85.142.87] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Exhaust Question... Date: Sun, 10 Jun 2012 07:52:14 -0400 Message-ID: <969E2237CB854B658C9205A0C83E6230@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01CD46DD.F3CBF840" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac1GvXpnnU1veBDBTkiT1wwgypu1mwAQP0aQ X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01CD46DD.F3CBF840 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Doug, How do you get two 2" pipes to go into a single 2" pipe? I looked you up on AirNav. It is about a thousand miles from Florida and the weather between was not good, so I couldn't make it. Why do you think so many drove in?? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com Sent: Saturday, June 09, 2012 11:59 PM To: Rotary motors in aircraft Subject: [FlyRotary] Exhaust Question... Rotary flyers: I did a couple of searches in the archives but couldn't really find the answer I was looking for so will post it here (sorry if this has be flogged in the past). I have a collector that is a 2 inch. OD pipe (from Burns SS I think), and it is fed by two 2 inch pipes coming from my exhaust manifold. My question is what are you guys (who have been flying for a while) finding works well as I proceed downstream? Should I keep it at 2 inches as I run it to a muffler, or should it be increased it size in an attempt to slow it down, decreased in size, etc. prior to hitting the muffler. I have yet to decide on a muffler so also am wondering if this is something I will have to attempt to build myself; or have some you had good luck by now with a certain brand? I think I read a while back that some of "decreased" the pipe size slightly as it comes out of the muffler (to the tip) and that reduced noise a bit and didn't really effect performance...is that true? Thanks for any inputs! Doug Lomheim 13B / RV-9A P.S. Had good turn out at our EAA sponsored Burger Burn and beautiful weather...but only one guy actually flew in...maybe Dennis / Mark / Bobby / Bill E. will be able to come up for visit next year! :) ------=_NextPart_000_000C_01CD46DD.F3CBF840 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Doug,

How do you get two 2” pipes = to go into a single 2” pipe?

I looked you up on AirNav. It = is about a thousand miles from Florida and the weather between was not good, so I couldn’t make it. = Why do you think so many drove in??

Bill B

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of DLOMHEIM@aol.com
Sent: Saturday, June 09, = 2012 11:59 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Exhaust Question...

Rotary = flyers:

=

I did a couple of searches in = the archives but couldn't really find the answer I was looking for so will = post it here (sorry if this has be flogged in the = past).

=

I have a collector that is a 2 = inch. OD pipe (from Burns SS I think), and it is fed by two 2 inch pipes coming = from my exhaust manifold. My question is what are you guys (who have been = flying for a while) finding works well as I proceed downstream? Should I = keep it at 2 inches as I run it to a muffler, or should it be increased it size = in an attempt to slow it down, decreased in size, etc. prior to = hitting the muffler. I have yet to decide on a muffler so also am = wondering if this is something I will have to attempt to build myself; or have some = you had good luck by now with a certain brand? =

=

I think I read a while back = that some of "decreased" the pipe size slightly as it comes = out of the muffler (to the tip) and that reduced noise a bit and didn't really effect performance...is that = true?

=

Thanks for any = inputs!

=

Doug = Lomheim

13B / = RV-9A

=

P.S. Had good turn out at = our EAA sponsored Burger Burn and beautiful weather...but only one guy actually = flew in...maybe Dennis / Mark / Bobby / Bill E. will be able to come up for visit next year! = :)

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