X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m17.mx.aol.com ([64.12.138.207] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 921091 for flyrotary@lancaironline.net; Sun, 01 May 2005 02:18:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.207; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m17.mx.aol.com (mail_out_v38_r1.7.) id q.fd.12c429ea (25508) for ; Sun, 1 May 2005 02:17:26 -0400 (EDT) From: WRJJRS@aol.com Message-ID: Date: Sun, 1 May 2005 02:17:25 EDT Subject: Re: [FlyRotary] Re: Inserts To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1114928245" X-Mailer: 9.0 for Windows sub 5038 -------------------------------1114928245 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/30/2005 8:07:43 PM Pacific Standard Time, ceengland@bellsouth.net writes: Kent Paser of 'Speed with Economy' fame played with 'reversion cones' on his Lyc. They are cones smaller in diameter than the exhaust ports & mounted directly in the ports. Obviously this should interfere with exhaust flow but he found that they can improve breathing in a Lyc. Charlie, There is more to the inversion cone exhaust than a restriction. I have talked to the guy that has at least tried to patent them. Jim Fueling. He did a lot of Land Speed record stuff. He was badly hurt in a Bonneville accident some time ago. The inversion cone uses a very minor taper to just under the standard exhaust diameter, that then dumps into an expansion area where the surrounding pipe is about a 1/3 bigger. (but still sealed) The pipe looks like a snake that swallowed an egg! The cones were usually placed about 8-10 inches from the exhaust port. I believe Fueling actually called them anti-reversion cones. The idea was that the sonic shock wave would be focused in the remaining tailpipe, while the expansion area would trap and break up any reflected wave. Some engines were helped by this others weren't. I believe he has a website. I always thought the rotary would benefit from the cones. I even mentioned it on the "other" site. Bill Jepson -------------------------------1114928245 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 4/30/2005 8:07:43 PM Pacific Standard Time, ceenglan= d@bellsouth.net writes:
Kent Paser of 'Speed with Economy' fame played= with 'reversion cones' on
his Lyc. They are cones smaller in diameter t= han the exhaust ports &
mounted directly in the ports. Obviously thi= s should interfere with
exhaust flow but he found that they can improve=20= breathing in a Lyc.
Charlie,
 There is more to the inversion cone exhaust than a restriction. I= have talked to the guy that has at least tried to patent them. Jim Fueling.= He did a lot of Land Speed record stuff. He was badly hurt in a Bonneville=20= accident some time ago. The inversion cone uses a very minor taper to just u= nder the standard exhaust diameter, that then dumps into an expansion area w= here the surrounding pipe is about a 1/3 bigger. (but still sealed) The pipe= looks like a snake that swallowed an egg! The cones were usually placed abo= ut 8-10 inches from the exhaust port. I believe Fueling actually called them= anti-reversion cones. The idea was that the sonic shock wave would be focus= ed in the remaining tailpipe, while the expansion area would trap and break=20= up any reflected wave. Some engines were helped by this others weren't. I be= lieve he has a website. I always thought the rotary would benefit from the c= ones. I even mentioned it on the "other" site.
Bill Jepson
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