Return-Path: Received: from rwcrmhc11.comcast.net ([204.127.198.35] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 574954 for flyrotary@lancaironline.net; Mon, 20 Dec 2004 21:48:22 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.198.35; envelope-from=jesse@jessfarr.com Received: from office5 (pcp04959909pcs.midval01.tn.comcast.net[68.59.199.44]) by comcast.net (rwcrmhc11) with SMTP id <200412210247510130013emee>; Tue, 21 Dec 2004 02:47:51 +0000 Message-ID: <02e601c4e707$714c0010$057ba8c0@farr.com> From: "jesse farr" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Oil cooler mount updated pictures Date: Mon, 20 Dec 2004 21:47:42 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02E3_01C4E6DD.883A4EA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_02E3_01C4E6DD.883A4EA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageSing that song to your last cooler again, maybe it will believe. = Maybe not. (I know, tackie sa comment, I apologize.) Too a certain = extent, you are or should be absolutely correct, 5w-30 should be no = thicker cold than 5 and no thinner hot than 30, but, why chance it ? It = also shouldn't have any more pressure, period, than bypass allows but = something obviously causes oil to act differently than water, with = coolers anyway; and, while hydraulic pressure is hydraulic pressure, = fluid density, compressibility difference, whatever, seems to be a good = a guess as any; and, one perhaps easily avoided by thermostatically = controlled relief valve. Why beat the poor little sucker to death = waiting for oil to reach 140, if it does have any effect ? =20 jofarr ----- Original Message ----- From: Russell Duffy=20 I disagree. I'm using 5W-30, so when it's cold, cold, cold, the oil = still isn't thick, thick, thick :-) Also, airplane guys are kind to = their engines. We crank them, and allow them to gently warm up before = running them hard. This is very different from how it would be used in = the car, which I suspect is why Mazda included the oil thermostat. The = only hassle is waiting for it to get 140 degrees before takeoff. I see = the thermostat as being nice, but not necessary. ------=_NextPart_000_02E3_01C4E6DD.883A4EA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message=
Sing that song to your last cooler = again,=20 maybe it will believe. Maybe not. (I know, tackie sa comment, I = apologize.)=20 Too a certain extent, you are or should be absolutely correct, 5w-30 = should be=20 no thicker cold than 5 and no thinner hot than 30, but, why chance = it ? It=20 also shouldn't have any more pressure, period, than bypass allows but = something=20 obviously causes oil to act differently than water, with coolers=20 anyway; and, while hydraulic pressure is hydraulic pressure, fluid = density,=20 compressibility difference, whatever, seems to be a good a guess as any; = and,=20 one perhaps easily avoided by thermostatically controlled relief=20 valve.  Why beat the poor little sucker to death waiting for oil to = reach=20 140, if it does have any effect ? 
jofarr
----- Original Message ----- = From: Russell=20 Duffy
 
I disagree.  I'm using 5W-30, so = when it's=20 cold, cold, cold, the oil still isn't thick, thick, thick = :-)  Also,=20 airplane guys are kind to their engines.  We crank them, and = allow them=20 to gently warm up before running them hard.  This is very = different from=20 how it would be used in the car, which I suspect is why Mazda included = the oil=20 thermostat.  The only hassle is waiting for it to get 140 degrees = before=20 takeoff.  I see the thermostat as being nice, but not=20 = necessary.
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