Return-Path: Received: from seraph2.grc.nasa.gov ([128.156.10.11] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 401866 for flyrotary@lancaironline.net; Wed, 08 Sep 2004 06:08:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=128.156.10.11; envelope-from=Joseph.M.Berki@grc.nasa.gov Received: from lombok-fi.grc.nasa.gov (lombok-fi.grc.nasa.gov [139.88.112.33]) by seraph2.grc.nasa.gov (Postfix) with ESMTP id 8740F68956 for ; Wed, 8 Sep 2004 06:08:05 -0400 (EDT) Received: from manihi.grc.nasa.gov (manihi.grc.nasa.gov [139.88.112.36]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i88A85V2016947 for ; Wed, 8 Sep 2004 06:08:05 -0400 (EDT) Received: from GR7700013583.lerc.nasa.gov (gr7700013583.grc.nasa.gov [139.88.139.62]) by manihi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i88A84Kq002262 for ; Wed, 8 Sep 2004 06:08:05 -0400 (EDT) X-Info: ODIN / NASA Glenn Research Center Message-Id: <5.1.1.5.2.20040908060010.017a6168@popserve.lerc.nasa.gov> X-Sender: scberki@popserve.lerc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Wed, 08 Sep 2004 06:08:01 -0400 To: "Rotary motors in aircraft" From: Joseph M Berki Subject: Re: [FlyRotary] Re: high oil pressure and coolers In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Rusty, What does the ducting to and from that evaporator core look like? Maybe air isn't flowing through it. I found a web site where 3rd gen wanabe racers are changing out their oil coolers for two Mocal units. I would also look at coolers at the Pacific oil cooler site. I spoke to them at Osh and asked them about the turbulator technology used in the Mazda coolers and basically he stated that A/C coolers use a similar technology. I think you need to see if air is going through the core. Joe At 09:50 PM 9/7/2004 -0500, you (Russell Duffy) wrote: >Thanks for all the comments, and particularly the rational logic from Al. >New decision: > >I ordered an AN12 male to female 45 degree fitting, that I can put inline >with the hose from the engine to the oil cooler. I should be able to tap >this for 1/8" NPT, and install a 150 psi pressure sender (also ordered). I >may, or may not fly it this way, but at least I'll know what the true >pressure is at the evap core. If it's less than 100, I'll just carry on >with the current configuration, and believe that my original core failed >because it was damage. > >I don't believe the evap core is restrictive, but I'll find out for sure >with my pressure test. I'll actually be measuring the core, and filter >together, so it's really worst case. > >As for temps, I can believe that the cruise temp should be less than 210 for >sure, but perhaps it's reasonable to allow the climb temp to go to maybe 230 >for a few minutes. How long can that possibly shorten the life of the >seals? If you figure the engine is good for at least 2000 hours under >normal conditions, that will be about 5 lifetimes for me, so I think I can >stand a little reduction in TBO. > >Cheers, >Rusty (much better now) > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html