X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.245] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 6.0c2) with ESMTP id 5846006 for flyrotary@lancaironline.net; Sun, 28 Oct 2012 13:25:27 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.245; envelope-from=bhughes@qnsi.net Received: from 10.0.0.5 ([10.0.0.5]) by qnsi-mail.qnsi.net ([10.0.0.5]) with Microsoft Exchange Server HTTP-DAV ; Sun, 28 Oct 2012 17:24:53 +0000 Content-Type: multipart/alternative; boundary="Apple-Mail-3936639E-5E99-4D0A-85D1-CAB494600983"; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: Re: [FlyRotary] Re: RV-6 w/9 mph exhaust area fairing References: From: "Bobby J. Hughes" In-Reply-To: Message-ID: <6B984C81-78F2-4CF5-8110-0CF2DE4ED7E8@qnsi.net> thread-index: Ac21MSSu9BqmKD6JTHm5Tn+zy1pDEw== thread-topic: [FlyRotary] Re: RV-6 w/9 mph exhaust area fairing Date: Sun, 28 Oct 2012 12:24:54 -0500 To: "Rotary motors in aircraft" MIME-Version: 1.0 (1.0) --Apple-Mail-3936639E-5E99-4D0A-85D1-CAB494600983 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable I like this design better than Vettermans except for the possible nose gear i= nterference problems. It appears the convex floor and vertical walls starts t= o converge just aft of the exhaust pipe exits. This should help accelerate t= he exit airflow without too much back pressure. The outside shape should kee= p the external airflow attached.=20 Bobby Hughes RV10 Super Renesis Sent from my iPad On Oct 28, 2012, at 4:35 AM, "alex" wrote: > Looks similar to Larry Vettermans subcowling mod, he also claimed that thi= s mod was his biggest single speed increase=20 >=20 > http://www.vettermanexhaust.com/ >=20 > (scroll through to the bottom to see it) >=20 > Alex >=20 >=20 >=20 > On Sun, Oct 28, 2012 at 4:49 AM, wrote: >> I went to the annual RV fly-in at Weatherford, OK today and saw an intere= sting RV-6 with some cool aero modifications. The owner said he has it going= 209 mph now on only 150 hp. He has a Paul Lipse prop but also installed a p= lenum with the intake area cut down 2/3rds from the stock cowling inlets and= also added an exhaust area fairing as seen at the attached link. He said t= hat just be adding this exhaust fairing alone added 9 mph to his top end... >> =20 >> Doug Lomheim >> RV-9A / 13B >> =20 >> =20 >> https://www.dropbox.com/s/gkqpe4hknihwsp2/Exhaust%20Exit%20Fairing.JPG >=20 --Apple-Mail-3936639E-5E99-4D0A-85D1-CAB494600983 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: base64 PGh0bWw+PGhlYWQ+PG1ldGEgaHR0cC1lcXVpdj0iY29udGVudC10eXBlIiBjb250ZW50PSJ0ZXh0 L2h0bWw7IGNoYXJzZXQ9dXRmLTgiPjwvaGVhZD48Ym9keSBkaXI9ImF1dG8iPjxkaXY+SSBsaWtl IHRoaXMgZGVzaWduIGJldHRlciB0aGFuIFZldHRlcm1hbnMgZXhjZXB0IGZvciB0aGUgcG9zc2li bGUgbm9zZSBnZWFyIGludGVyZmVyZW5jZSBwcm9ibGVtcy4gSXQgYXBwZWFycyB0aGUgY29udmV4 IGZsb29yIGFuZCB2ZXJ0aWNhbCB3YWxscyBzdGFydHMgdG8gY29udmVyZ2UganVzdCBhZnQgb2Yg dGhlIGV4aGF1c3QgcGlwZSBleGl0cy4gVGhpcyBzaG91bGQgaGVscCBhY2NlbGVyYXRlIHRoZSBl eGl0IGFpcmZsb3cgd2l0aG91dCB0b28gbXVjaCBiYWNrIHByZXNzdXJlLiBUaGUgb3V0c2lkZSBz aGFwZSBzaG91bGQga2VlcCB0aGUgZXh0ZXJuYWwgYWlyZmxvdyBhdHRhY2hlZC4mbmJzcDs8L2Rp dj48ZGl2Pjxicj48L2Rpdj48ZGl2PkJvYmJ5IEh1Z2hlczwvZGl2PjxkaXY+UlYxMCBTdXBlciBS ZW5lc2lzPC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj48YnI+PC9kaXY+ PGRpdj48YnI+U2VudCBmcm9tIG15IGlQYWQ8L2Rpdj48ZGl2Pjxicj5PbiBPY3QgMjgsIDIwMTIs IGF0IDQ6MzUgQU0sICJhbGV4IiAmbHQ7PGEgaHJlZj0ibWFpbHRvOmFsZXgubW9sdGVub0BnbWFp bC5jb20iPmFsZXgubW9sdGVub0BnbWFpbC5jb208L2E+Jmd0OyB3cm90ZTo8YnI+PGJyPjwvZGl2 PjxibG9ja3F1b3RlIHR5cGU9ImNpdGUiPjxkaXY+TG9va3Mgc2ltaWxhciB0byZuYnNwO0xhcnJ5 IFZldHRlcm1hbnMgc3ViY293bGluZyBtb2QsIGhlIGFsc28gY2xhaW1lZCB0aGF0IHRoaXMgbW9k IHdhcyBoaXMgYmlnZ2VzdCBzaW5nbGUgc3BlZWQgaW5jcmVhc2UmbmJzcDs8ZGl2Pjxicj48L2Rp dj48ZGl2PjxhIGhyZWY9Imh0dHA6Ly93d3cudmV0dGVybWFuZXhoYXVzdC5jb20vIj5odHRwOi8v d3d3LnZldHRlcm1hbmV4aGF1c3QuY29tLzwvYT48L2Rpdj4NCjxkaXY+PGJyPjwvZGl2PjxkaXY+ KHNjcm9sbCB0aHJvdWdoIHRvIHRoZSBib3R0b20gdG8gc2VlIGl0KTwvZGl2PjxkaXY+PGJyPjwv ZGl2PjxkaXY+QWxleDxicj48ZGl2Pjxicj48L2Rpdj48ZGl2Pjxicj48ZGl2Pjxicj48ZGl2IGNs YXNzPSJnbWFpbF9xdW90ZSI+T24gU3VuLCBPY3QgMjgsIDIwMTIgYXQgNDo0OSBBTSwgIDxzcGFu IGRpcj0ibHRyIj4mbHQ7PGEgaHJlZj0ibWFpbHRvOkRMT01IRUlNQGFvbC5jb20iIHRhcmdldD0i X2JsYW5rIj5ETE9NSEVJTUBhb2wuY29tPC9hPiZndDs8L3NwYW4+IHdyb3RlOjxicj4NCjxibG9j a3F1b3RlIGNsYXNzPSJnbWFpbF9xdW90ZSIgc3R5bGU9Im1hcmdpbjowIDAgMCAuOGV4O2JvcmRl ci1sZWZ0OjFweCAjY2NjIHNvbGlkO3BhZGRpbmctbGVmdDoxZXgiPjx1PjwvdT4NCg0KDQoNCjxk aXYgc3R5bGU9ImZvbnQtc2l6ZToxMHB0O2ZvbnQtZmFtaWx5OkFyaWFsIj48Zm9udCBjb2xvcj0i IzAwMDAwMCIgZmFjZT0iQXJpYWwiPg0KPGRpdj4NCjxkaXY+SSB3ZW50IHRvIHRoZSBhbm51YWwg UlYgZmx5LWluIGF0IFdlYXRoZXJmb3JkLCBPSyB0b2RheSBhbmQgc2F3IGFuIA0KaW50ZXJlc3Rp bmcgUlYtNiB3aXRoIHNvbWUgY29vbCBhZXJvIG1vZGlmaWNhdGlvbnMuIFRoZSBvd25lciBzYWlk IGhlIGhhcyBpdCANCmdvaW5nIDIwOSBtcGggbm93IG9uIG9ubHkgMTUwIGhwLiBIZSBoYXMgYSBQ YXVsIExpcHNlIHByb3AgYnV0IGFsc28gaW5zdGFsbGVkIGEgDQpwbGVudW0gd2l0aCB0aGUgaW50 YWtlIGFyZWEgY3V0IGRvd24gMi8zcmRzIGZyb20gdGhlIHN0b2NrIGNvd2xpbmcgaW5sZXRzIGFu ZCANCmFsc28mbmJzcDthZGRlZCBhbiBleGhhdXN0IGFyZWEgZmFpcmluZyBhcyBzZWVuIGF0IHRo ZSBhdHRhY2hlZCBsaW5rLiZuYnNwOyBIZSANCnNhaWQmbmJzcDt0aGF0IGp1c3QgYmUgYWRkaW5n IHRoaXMgZXhoYXVzdCBmYWlyaW5nIGFsb25lIGFkZGVkIDkgbXBoIHRvIGhpcyB0b3AgDQplbmQu Li48L2Rpdj4NCjxkaXY+Jm5ic3A7PC9kaXY+DQo8ZGl2PkRvdWcgTG9taGVpbTwvZGl2Pg0KPGRp dj5SVi05QSAvIDEzQjwvZGl2PjwvZGl2Pg0KPGRpdj4mbmJzcDs8L2Rpdj4NCjxkaXY+Jm5ic3A7 PC9kaXY+DQo8ZGl2PjxhIGhyZWY9Imh0dHBzOi8vd3d3LmRyb3Bib3guY29tL3MvZ2txcGU0aGtu aWh3c3AyL0V4aGF1c3QlMjBFeGl0JTIwRmFpcmluZy5KUEciIHRhcmdldD0iX2JsYW5rIj5odHRw czovL3d3dy5kcm9wYm94LmNvbS9zL2drcXBlNGhrbmlod3NwMi9FeGhhdXN0JTIwRXhpdCUyMEZh aXJpbmcuSlBHPC9hPjwvZGl2Pg0KPGRpdj4mbmJzcDs8L2Rpdj4NCjxkaXY+Jm5ic3A7PC9kaXY+ PC9mb250PjwvZGl2PjwvYmxvY2txdW90ZT48L2Rpdj48YnI+PC9kaXY+PC9kaXY+PC9kaXY+DQo8 L2Rpdj48L2Jsb2NrcXVvdGU+PC9ib2R5PjwvaHRtbD4= --Apple-Mail-3936639E-5E99-4D0A-85D1-CAB494600983--