Return-Path: Received: from capitol.mail.pas.earthlink.net ([207.217.120.180] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 593291 for flyrotary@lancaironline.net; Thu, 06 Jan 2005 10:10:20 -0500 Received-SPF: none receiver=logan.com; client-ip=207.217.120.180; envelope-from=j-winddesigns@thegrid.net Received: from sdn-ap-016ilchicp0343.dialsprint.net ([65.176.161.89] helo=thegrid.net) by capitol.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 1CmZGb-0005Fi-00 for flyrotary@lancaironline.net; Thu, 06 Jan 2005 07:09:38 -0800 Date: Thu, 6 Jan 2005 10:10:17 -0500 Subject: Re: [FlyRotary] Re: P-Port stuff- was Re: RV-3 engine rebuild Content-Type: multipart/mixed; boundary=Apple-Mail-33-15481975 Mime-Version: 1.0 (Apple Message framework v552) From: Jerry Hey To: "Rotary motors in aircraft" In-Reply-To: Message-Id: <12D10870-5FF5-11D9-AB88-0003931B0C7A@thegrid.net> X-Mailer: Apple Mail (2.552) --Apple-Mail-33-15481975 Content-Type: multipart/alternative; boundary=Apple-Mail-34-15481975 --Apple-Mail-34-15481975 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed When I was working out the details of my p ports, I made a number of=20= drawings to help visualize what was going on. the one below compares=20= my p port to the Leman P Port which is similar to, but slightly=20 smaller than, the p- port housings sold at this time by Racing Beat. My p ports open at 78=BA BTDC and close at 75=BA ABDC. This = drawing=20 shows how much later the ports open in comparison with the Leman P=20 Port and how they close at nearly the same time. According to=20 calculations made by Rolf Peiffer who helped me a lot, my little port=20 has sufficient capacity up to 8000 rpm. After that you would want to=20= go bigger. The exhaust port was left stock with the splitters in. =20= . Jerry --Apple-Mail-34-15481975 Content-Transfer-Encoding: quoted-printable Content-Type: text/enriched; charset=ISO-8859-1 When I was working out the details of my p ports, I made a number of drawings to help visualize what was going on. the one below compares my p port to the Leman P Port which is similar to, but slightly smaller than, the p- port housings sold at this time by Racing Beat. =20= My p ports open at 78=BA BTDC and close at 75=BA ABDC. This drawing shows how much later the ports open in comparison with the Leman P Port and how they close at nearly the same time. According to calculations made by Rolf Peiffer who helped me a lot, my little port has sufficient capacity up to 8000 rpm. After that you would want to go bigger. The exhaust port was left stock with the splitters in. . 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boundary=Apple-Mail-35-15481976 --Apple-Mail-35-15481976 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; format=flowed On Thursday, January 6, 2005, at 09:03 AM, Russell Duffy wrote: > I see the exhaust closing left stock at around 48 ATDC. > > Then open the intake later than stock, to eliminate as much overlap as > possible. The=A0 a way late closing point for the intake. > > Lynn E. Hanover > > =A0 > This all makes sense, and certainly sounds reasonable.=A0 Thanks for=20= > being willing to sneak out in the workshop, when I "know" you'd rather=20= > be working on house stuff=A0:-) > =A0 > As for the actual construction, aren't most of these PP inlets just=20 > epoxied in place?=A0 It just seems hard to believe that it won't leak=20= > water at some point if you do that.=A0=A0Is the rotor housing alloy=20 > weldable?=A0 Can the port be TIG welded inside and out, rather than=20 > epoxied?=A0 > > Should have the RV-3 engine home this weekend, but probably not apart=20= > until sometime next week.=A0 > > Thanks, > Rusty > > > --Apple-Mail-35-15481976 Content-Transfer-Encoding: quoted-printable Content-Type: text/enriched; charset=ISO-8859-1 On Thursday, January 6, 2005, at 09:03 AM, Russell Duffy wrote: I see the exhaust closing left stock at around 48 ATDC. Then open the intake later than stock, to eliminate as much overlap as possible. The=A0 a way late closing point for the intake. Lynn E. Hanover =A0 ArialFFFF,0000,0000This all makes sense, and certainly sounds reasonable.=A0 Thanks for being willing to sneak out in the workshop, when I "know" you'd rather be working on house stuff=A0:-) =A0 ArialFFFF,0000,0000As for the actual construction, aren't most of these PP inlets just epoxied in place?=A0 It just seems hard to believe that it won't leak water at some point if you do that.=A0=A0Is the rotor housing alloy weldable?=A0 Can the port be TIG welded inside and out, rather than epoxied?=A0 = ArialFFFF,0000,0000Should= have the RV-3 engine home this weekend, but probably not apart until sometime next week.=A0 = ArialFFFF,0000,0000Thanks= , = ArialFFFF,0000,0000Rusty<= /color> = --Apple-Mail-35-15481976-- --Apple-Mail-33-15481975--