X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1239120 for flyrotary@lancaironline.net; Sun, 16 Jul 2006 17:39:11 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=ALVentures@cox.net Received: from BigAl ([72.192.132.90]) by fed1rmmtao01.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060716213824.XMFR22974.fed1rmmtao01.cox.net@BigAl> for ; Sun, 16 Jul 2006 17:38:24 -0400 From: "Al Gietzen" To: "Rotary motors in aircraft" Subject: Cooling coupling Date: Sun, 16 Jul 2006 14:38:25 -0700 Message-ID: <000001c6a920$2b6c6710$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C6A8E5.7F0D8F10" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C6A8E5.7F0D8F10 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I'm curious how much thermal 'coupling' there is between the oil and = water cooling in the engine; and whether it is more one way than the other. = IOW; if I could lower the coolant temp by 20 degrees, how much effect would = that have on the oil temp, if any; and vice versa. =20 I'm thinking about this regarding cooling on the ground, and if I'm = going to work on reducing one or the other, which might have the greater benefit. = As it is now, the oil gets to 220F about the time the coolant gets to 210F. Options under consideration are a fan behind the coolant rad; and a = water spray setup for the oil cooler. =20 Al =20 =20 ------=_NextPart_000_0001_01C6A8E5.7F0D8F10 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I’m curious how much thermal = ‘coupling’ there is between the oil and water cooling in the engine; and whether it = is more one way than the other.  IOW; if I could lower the coolant = temp by 20 degrees, how much effect would that have on the oil temp, if any; and = vice versa.

 

I’m thinking about this regarding cooling on = the ground, and if I’m going to work on reducing one or the other, = which might have the greater benefit.  As it is now, the oil gets to 220F = about the time the coolant gets to 210F.  Options under consideration are = a fan behind the coolant rad; and a water spray setup for the oil = cooler.

 

Al

 

 

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