X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wa-out-1112.google.com ([209.85.146.181] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2079204 for flyrotary@lancaironline.net; Fri, 01 Jun 2007 16:54:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.146.181; envelope-from=blake.lewis@gmail.com Received: by wa-out-1112.google.com with SMTP id v33so1705746wah for ; Fri, 01 Jun 2007 13:53:55 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=BWI7zSohSRczRfTQ3svR1J0xmVI60kvzGJzN1mW6yprEkE6bW7NrfctR/zdfcH0WTdtGDaD2uonbMYR/pn/JQzbckMFH8uJaAupZkkCxIRLWmWHIOOWXpgdigQA44z/mZB0Okj9ZKCLNMWjuzUWyXbq9grwoYeJCLEA+he/4JHU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=HGaBQIymoAc50lLpvu5sdq8MYJfzEk9dHJlKCFUE8T5Ez9AHWyy/w0rJbAstnzQIS6jRpdWTmPqLuxqs27UTKBa/4R8XjixThF+EXfzxsvMCt1MEgg0i/ll9woNRN8jIMJ6b4bonzRnWhK1heiT2OBngXEXdDlZ9cYLT5xewvAw= Received: by 10.114.76.1 with SMTP id y1mr2127082waa.1180731235520; Fri, 01 Jun 2007 13:53:55 -0700 (PDT) Received: by 10.141.43.4 with HTTP; Fri, 1 Jun 2007 13:53:55 -0700 (PDT) Message-ID: Date: Fri, 1 Jun 2007 15:53:55 -0500 From: "Blake Lewis" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: PP Ve??? was Re: Intake CFM air flow In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: Bob, You corrected the wrong way. And I had 10000 instead of 10700 rpm. 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 (934113ci/min) / (10700 rev/min) = 87.30 ci/rev 1200cc / (2.54cm * 2.54cm * 2.54cm)/ci = 73.22 ci volume 87.30 ci/rev / 73.22 ci/rev = 1.192 =119% VE Blake