Return-Path: Received: from rwcrmhc12.comcast.net ([216.148.227.85] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP id 740914 for flyrotary@lancaironline.net; Tue, 15 Feb 2005 21:35:21 -0500 Received-SPF: none receiver=logan.com; client-ip=216.148.227.85; envelope-from=techwelding@comcast.net Received: from dell (pcp08732020pcs.paduca01.ky.comcast.net[69.139.125.92]) by comcast.net (rwcrmhc12) with SMTP id <2005021602342901400g3jvae>; Wed, 16 Feb 2005 02:34:35 +0000 Message-ID: <000601c513d0$0c657c30$5c7d8b45@dell> From: "Ed Klepeis" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Big Butterflies, was: Bruce Turrentine Intake Date: Tue, 15 Feb 2005 20:34:27 -0600 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Jerry What is your opinion on bruce's intake.? I would love to have your eng down here and whip up a manifold in no time and show the rest of the rotary world what it's all about keep that idea in mind and I would precut and premake as much as possible so when you come we could whip it together in one day. You can come and stay at my home while we make it. What a deal. Regards Ed techwelding@comcast.net ----- Original Message ----- From: "Jerry Hey" To: "Rotary motors in aircraft" Sent: Tuesday, February 15, 2005 12:04 PM Subject: [FlyRotary] Re: Big Butterflies, was: Bruce Turrentine Intake > Bob, that does seem large. For reference, the p port has two > butterflies for a TOTAL of 4.1 sq in. This was based on calculations > done by Rolf and should be good up to 8000 rpm. The size is similar to > what Power Sport is using and what Paul Yaw has recommended. Jerry >> >> Hi Tom, >> >> I think there is a small error in your area calc. A = pi* r^2, so >> A = 3.14*(2.5625/2)^2 =~ 3.14*1.28*1.28 = 5.15 sq. in. >> >> I'm hoping to get the engine running pretty soon to get some idea of how >> well it is going to work. >> >> Bob White >> >> On Tue, 15 Feb 2005 08:54:12 -0800 (PST) >> Tom wrote: >> >> >>> >>> So lets take your butterfly size of 2 9/16 inches. >>> Bobs butterfly area = (2 9/16 / 2) x 3.14 = 4.02 square inches >>> Max supported airflow based on their rule-of-thumb = 4.02 x 140CFM = >>> 562CFM Max HP based on these (100HP per each 140CFM) = 402HP >>> The difference between the actual HP your motor will make and 402HP is >>> throttle-movement that would do nothing for you. >>> >>> Here's the website: >>> http://www.dune-buggy.com/turbo/intake.htm >>> >>> Still learning stuff, >>> Tom >>> >>> >>> >>> >> >> >> http://www.bob-white.com >> N93BD - Rotary Powered BD-4 (soon) >> >>>> Homepage: http://www.flyrotary.com/ >>>> Archive: http://lancaironline.net/lists/flyrotary/List.html >> > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html