X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wr-out-0506.google.com ([64.233.184.232] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1239397 for flyrotary@lancaironline.net; Sun, 16 Jul 2006 22:55:40 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.232; envelope-from=russell.duffy@gmail.com Received: by wr-out-0506.google.com with SMTP id 58so406237wri for ; Sun, 16 Jul 2006 19:54:54 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:x-mimeole:importance:in-reply-to; b=QtLPJvHzDjYLgpTm41owMs//69bG2kKVQXYibdarePOzFAECXMHGOTWX3tV4MErmhVt6J4LlGrw3IEzN0nnNq8eFpeEyE+yuFHZRCazpa6QdoUghMEF391JV1BiFZ/EEUVFqVGjmrScmFLUpizWiAnCZeW3WKQlF8AmUgtJ6Dxc= Received: by 10.54.139.7 with SMTP id m7mr1646574wrd; Sun, 16 Jul 2006 19:54:54 -0700 (PDT) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 64sm2770169wra.2006.07.16.19.54.52; Sun, 16 Jul 2006 19:54:53 -0700 (PDT) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Cooling coupling Date: Sun, 16 Jul 2006 21:54:52 -0500 Message-ID: <007001c6a94c$60f07da0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0071_01C6A922.781A75A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0071_01C6A922.781A75A0 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 =20 Hi Al, =20 I really can't answer this, but my guess would be that any coupling = would work equally both ways. =20 =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. = =20 =20 If your oil temp is higher than your coolant temp now, I'd work on the = oil temp first. =20 Cheers, Rusty (dark side project smoking right along)=20 ------=_NextPart_000_0071_01C6A922.781A75A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I’m curious how = much thermal=20 ‘coupling’ there is between the oil and water cooling in the = engine; and whether=20 it is more one way than the other.  IOW; if I could lower the = coolant temp=20 by 20 degrees, how much effect would that have on the oil temp, if any; = and vice=20 versa. 
 
Hi=20 Al,
 
I = really can't=20 answer this, but my guess would be that any coupling would work = equally=20 both ways.   

 

I’m thinking about = this regarding=20 cooling on the ground, and if I’m going to work on reducing one or = the other,=20 which might have the greater benefit.  As it is now, the oil gets = to 220F=20 about the time the coolant gets to 210F.   

 

If your oil=20 temp is higher than your coolant temp now, I'd work on the oil temp=20 first.

 

Cheers,

Rusty (dark side=20 project smoking right=20 along) 

------=_NextPart_000_0071_01C6A922.781A75A0--