X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1155618 for flyrotary@lancaironline.net; Thu, 15 Jun 2006 12:11:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-111-186.carolina.res.rr.com [24.74.111.186]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id k5FGAQx6008226 for ; Thu, 15 Jun 2006 12:10:28 -0400 (EDT) Message-ID: <003201c69096$574cc160$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Remove Turbo Date: Thu, 15 Jun 2006 12:11:20 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Virus-Scanned: Symantec AntiVirus Scan Engine Anything you can do to reduce the power and therefore heat your engine is developing will reduce the BTU of waste heat your cooling system must deal with. Leaning would reduce the heat load - but, whether sufficiently to materially affect your cooling is another story. My calculations shows the following: Rpm A/F ratio Fuel Flow BTU 1000 12:1 2.9 1417 1000 14.7 2.3 1157 1000 17.4 2.0 987 However, keep in mind that at lower idle RPM you need a richer mixture to keep the engine turning over, so you can not lean the engine as much at idle as you can up in the air at cruise. My 0.02 worth Ed ----- Original Message ----- From: "Ernest Christley" To: "Rotary motors in aircraft" Sent: Thursday, June 15, 2006 11:01 AM Subject: [FlyRotary] Re: Remove Turbo > Steve Brooks wrote: > >>>What if you are in line on really hot day? You might not even get 2 min >>>of >>>max power. >>>I would rather err on the wild side of cooling - you always can cut down >>>and close off, once you know your ride... >>> > Are there alternatives to keep things cooler while sitting in line? Would > an extremely lean mixture make a difference? > > -- > > ,|"|"|, Ernest Christley | > ----===<{{(oQo)}}>===---- Dyke Delta Builder | > o| d |o http://ernest.isa-geek.org | > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >