Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 571798 for flyrotary@lancaironline.net; Fri, 17 Dec 2004 23:17:00 -0500 Received-SPF: none receiver=logan.com; client-ip=24.25.9.102; envelope-from=echristley@nc.rr.com Received: from nc.rr.com (cpe-024-211-191-066.nc.rr.com [24.211.191.66]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with ESMTP id iBI4GQkc016763 for ; Fri, 17 Dec 2004 23:16:27 -0500 (EST) Message-ID: <41C3AF06.9040406@nc.rr.com> Date: Fri, 17 Dec 2004 23:16:06 -0500 From: Ernest Christley User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] I'm better now References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Symantec AntiVirus Scan Engine Russell Duffy wrote: > Greetings, > > I may even abandon the evap cores for > water cooling as well. I just don't trust them anymore. > Ha!HA! Let the fun continue. Welcome back, Rusty! Let's start by questioning your statement above. The word 'trust' carries a lot of emotional connotation. Emotion that seems misplaced in this instance. My point is that we KNOW they work well as water coolers, what with so many people flying with them. But they have proven themselves very much less than satisfactory with the oil cooling. The big question is what is different between the two systems. If that can be answered, we'll know why they don't work and what parameters to specify for any other aftermarket oil cooler. I believe it was you who mentioned that there might be harmonics caused by pressure pulses from the pump. Would it be possible to attach a fast responding pressure transducer in front of a stock cooler and connect it to a scope. Run the engine a look for suspect pressure pulses? Ernest (suggesting experiments with no way to execute them myself...yet) -- http://www.ernest.isa-geek.org/ "This is by far the hardest lesson about freedom. It goes against instinct, and morality, to just sit back and watch people make mistakes. We want to help them, which means control them and their decisions, but in doing so we actually hurt them (and ourselves)."