X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rwcrmhc11.comcast.net ([216.148.227.151] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2079196 for flyrotary@lancaironline.net; Fri, 01 Jun 2007 16:47:28 -0400 Received-SPF: none receiver=logan.com; client-ip=216.148.227.151; envelope-from=rlwhite@comcast.net Received: from rlwhite (c-68-35-160-229.hsd1.nm.comcast.net[68.35.160.229]) by comcast.net (rwcrmhc11) with SMTP id <20070601204650m11008qnu0e>; Fri, 1 Jun 2007 20:46:50 +0000 Date: Fri, 1 Jun 2007 14:47:31 -0600 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: PP Ve??? was Re: Intake CFM air flow Message-Id: <20070601144731.a7604334.rlwhite@comcast.net> In-Reply-To: References: X-Mailer: Sylpheed 2.4.2 (GTK+ 2.10.11; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit But it's a 12A so 1300 CC is too big. 117.74 * 12 / 13 = 108.7 Bob W. On Fri, 1 Jun 2007 15:39:43 -0500 "Blake Lewis" wrote: > On 6/1/07, Blake Lewis wrote: > > 12A Pports can do 310 HP at 10,700 RPM at .667 > > > > If the .667 is BSFC then start with that. > > density of air at sea level 15C = .0765 lbs/cf > > air/fuel = 12 > > > > .667 bsfc x 310hp is 206.77 lbs/hr fuel > > > > 206.77lbs x 12 = 2481.24 lbs/hr air > > > > 2481.24 lbs/hr / 60min/hr = 41.354 lbs/min > > > > (41.354 lbs/min) / (.0765 lbs/cf) * (1728 ci/cf) = 93411 ci /min > > > > (93411ci/min) / (10000 rev/min) = 93.41 ci/rev > > oops I guess my numbers are wrong (9.3411) > > > 1300cc / (2.54cm * 2.54cm * 2.54cm)/ci = 79.33 ci volume > > > > 93.41ci / 79.33ci = 1.1774 = 117.74 % VE > > > > Blake > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://www.roblinphoto.com/shop/