X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from pan.gwi.net ([207.5.128.165] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTPS id 2958719 for flyrotary@lancaironline.net; Sun, 08 Jun 2008 12:43:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.5.128.165; envelope-from=silvius@gwi.net Received: from yourlk4rlmsu41 (bb-216-195-174-159.gwi.net [216.195.174.159]) by pan.gwi.net (8.13.1/8.13.1) with SMTP id m58Gh0W5056329 for ; Sun, 8 Jun 2008 12:43:03 -0400 (EDT) (envelope-from silvius@gwi.net) Message-ID: <003001c8c98f$0d2f0230$9faec3d8@yourlk4rlmsu41> From: "Michael Silvius" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Muffler failed designs. Date: Sun, 8 Jun 2008 12:42:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002D_01C8C965.20D61500" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1807 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1807 This is a multi-part message in MIME format. ------=_NextPart_000_002D_01C8C965.20D61500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable An open question to the collective knowledge of this group on the = subject of exhaust systems.=20 Has anyone installed an exhaust with a manifold box like the original = N/A 13B ?=20 In other words, what about building a box collector of similar = dimensions to the original heavy cast iron unit on the N/A 13B but made = out of say .120 thou SS ?=20 Would this help dampen the exhaust pulses ? Or are we just opening a = whole new can of worms by going down that track?=20 I think it would leave some HP on the table but for someone like myself = not seekeing any more than about 160 hp out of my application is it = reasonable? Michael in Maine Falconar F12 at glacial pace. ------=_NextPart_000_002D_01C8C965.20D61500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

An open question to the collective knowledge of this group on the = subject of=20 exhaust systems.

Has anyone installed an exhaust with a manifold box like the original = N/A 13B=20 ?

In other words, what about building a box collector of similar = dimensions to=20 the original heavy cast iron unit on the N/A 13B but made out of say = .120 thou=20 SS ?

Would this help dampen the exhaust pulses ? Or are we just = opening a=20 whole new can of worms by going down that track?

I think it would leave some HP on the table but for someone like = myself=20 not seekeing any more than about 160 hp out = of my application is=20 it reasonable?

Michael in Maine

Falconar F12 at glacial pace.

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