Return-Path: Received: from rokland5.awh.us ([67.15.10.31] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP-TLS id 612076 for flyrotary@lancaironline.net; Tue, 18 Jan 2005 15:49:52 -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]:33456 helo=quail) by rokland5.awh.us with smtp (Exim 4.43) id 1Cr0Hx-0004ay-Bm for flyrotary@lancaironline.net; Tue, 18 Jan 2005 14:49:21 -0600 Date: Tue, 18 Jan 2005 13:49:18 -0700 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Switching to Evans NPG+ Message-Id: <20050118134918.365c10f9.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; 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 - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com X-Source: X-Source-Args: X-Source-Dir: Rusty, Here are a copuple of links I got with a quick google search. http://www.evanscooling.com/main3.htm http://www.kneedraggers.com/details/38-EVANS-2 How soon are one of you guys going to try this stuff. I'm going to be puttting coolant in pretty soon. Also, there is NPG, NPG+ (which apparently has some ethylene glycol in it), and NPG-R which is lower viscosity but needs to be changed once per year. They are all $25-$26 per gal. Bob White On Tue, 18 Jan 2005 14:12:28 -0600 "Russell Duffy" <13brv3@bellsouth.net> wrote: > It works out that a volume of NPG+ is only 17% less efficient than the > same volume of 50/50. Once hot, the vescosity is not an issue, being > only slightly more viscous than water (no system change usually > necessary). > > >From the reports I've seen, it has to be true that there isn't a huge > difference in cooling performance. Ken Welter has already stated that > he's changed back and forth a couple time, and didn't see any real > diff in temps. Loads of folks with RX-7's use it, and also don't > report any dire consequences. At the same time, I'm not sure there > are global cooling improvements to be made either. > > I believe the benefit of being able to run pressure less, coupled with > higher boiling point makes it worth trying for me. Now if I can just > find some. Have you found any good online sources? Most of my normal > places don't carry it. > > Cheers, > Rusty (engine repair status- one week down, and going nowhere fast) > > -- http://www.bob-white.com N93BD - Rotary Powered BD-4 (soon)