Return-Path: Received: from rokland5.awh.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.3c1) with ESMTP-TLS id 742901 for flyrotary@lancaironline.net; Thu, 17 Feb 2005 10:30:13 -0500 Received-SPF: none receiver=logan.com; client-ip=67.15.10.31; envelope-from=bob@bob-white.com Received: from bgp01386375bgs.brodwy01.nm.comcast.net ([68.35.160.229]:32962 helo=quail) by rokland5.awh.us with smtp (Exim 4.43) id 1D1nap-0007Ks-98; Thu, 17 Feb 2005 09:29:27 -0600 Date: Thu, 17 Feb 2005 08:29:25 -0700 From: Bob White To: "Rotary motors in aircraft" Cc: lors01@msn.com Subject: Re: [FlyRotary] Re: Returnless Fuel System - Fuel Cooler Message-Id: <20050217082925.640ef3a2.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed version 1.9.2 (GTK+ 2.4.9; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Antivirus-Scanner: Clean mail though you should still use an Antivirus X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - rokland5.awh.us X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com X-Source: X-Source-Args: X-Source-Dir: Hi Tracy, My alternative is to try to jam all the return fuel thru a 1/4 inch line. It seems like that will cause problems also. It's fairly substantial surgery to get a 3/8 inch return line in. I certainly agree that without the cooler it's a disaster waiting to happen. I'm relying somewhat on Todd's positive experiences with his system, and further testing on my plane. Bob White On Thu, 17 Feb 2005 09:52:56 -0500 "Tracy Crook" wrote: > Even with the cooler, This scares me. I know of at least 2 cases where it has caused power failures, one resulted in fatality. True, they didn't have the cooler but it is a bandaid covering up a problem. > > Tracy > > Hi Jim, > > Todd's system is a "quasi" returnless system. The fuel is returned to > the input of the fuel pump instead of the tank. Without the cooler, > much of the same fuel would circulate thru the fuel rail again and agin > picking up heat. To see Todd's diagram and description go to: > > http://www.rotarywiki.com/ and search for "returnless". > > Bob White > > > On Wed, 16 Feb 2005 23:25:06 -0600 > Jim Sower > wrote: > > > But I thought the purpose of the cooler was to cool the *return* fuel. > > If it's a one-way system, how does the fuel get hot enough to need cooling? > > What am I missing here? ... Jim S. > > > > Bob White wrote: > > > > >Todd, > > > > > >I'm going to build a returnless system based on your design. I found > > >this fuel cooler at Jeg's for about $40. Jeg's P/N 771-1009. The > > >finned area is 4.5 X 5 X 7/8 (inch), which I think is a little bigger > > >than the one you made. > > > > > >http://www.jegs.com/cgi-bin/ncommerce3/ProductDisplay?prrfnbr=3532&prmenbr=361 > > > > > >I'm sure it's nicer looking than anything I could build myself. I'll > > >post pictures of my alternator bracket one of these days to prove it. > > > > > >Bob White > > > > > > > > > > > > > >> Homepage: http://www.flyrotary.com/ > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > > > > > > -- > http://www.bob-white.com > N93BD - Rotary Powered BD-4 (real soon) > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (real soon)