X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3859396 for flyrotary@lancaironline.net; Sat, 19 Sep 2009 04:56:13 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id 14D861738B3 for ; Sat, 19 Sep 2009 16:55:36 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 9E0B7BEC01C for ; Sat, 19 Sep 2009 16:55:35 +0800 (WST) Message-ID: <8DD5306927314CDDA87A9C5BE5152C28@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] exhaust port design Date: Sat, 19 Sep 2009 18:55:42 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0207_01CA395A.C9B40AE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 090918-0, 09/18/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0207_01CA395A.C9B40AE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kevin, I'm well behind in my e-mails but can't see a response to your question. = If that is the stock standard exhaust manifold it appears to be of a = poor design - as you probably guessed. Blending would be more = appropriate IMHO. George ( down under) in my very limited understanding o f engines, I thought that a lot of attention was spent on reducing = turbulent flow in the intake and exhaust streams. I am surprised to see = what the center port of the stock renesis exhaust manifold looks like - = kind of a rectangular hole matched to a round tube, with square edges = everywhere. I'm not planning on modifying this, but was interested in = other's comments. kevin -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0207_01CA395A.C9B40AE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Kevin,
I'm well behind in my e-mails but can't = see a=20 response to your question. If that is the stock standard exhaust = manifold it=20 appears to be of a poor design - as you probably guessed. Blending would = be more=20 appropriate IMHO.
George ( down under)
in my very limited understanding=20 o
f engines, I thought that a lot of = attention=20 was spent on reducing turbulent flow in the intake and exhaust = streams. =20 I am surprised to see what the center port of the stock renesis = exhaust=20 manifold looks like - kind of a rectangular hole matched to a round = tube, with=20 square edges everywhere.  I'm not planning on modifying this, but = was=20 interested in other's comments.    kevin

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