X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3813162 for flyrotary@lancaironline.net; Fri, 14 Aug 2009 10:14:30 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao105.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090814141351.NUKJ21106.fed1rmmtao105.cox.net@fed1rmimpo01.cox.net> for ; Fri, 14 Aug 2009 10:13:51 -0400 Received: from BigAl ([72.192.133.78]) by fed1rmimpo01.cox.net with bizsmtp id UEDr1c00S1hf1Cg03EDrw7; Fri, 14 Aug 2009 10:13:51 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=rhS4oly9U1AA:10 a=Ia-xEzejAAAA:8 a=4JSC9OyBjHeHkJrkXUIA:9 a=jHovF5rgO019A0q3jBGflcDQPskA:4 a=EzXvWhQp4_cA:10 a=M9NCuXOXNm8Wvj2Vd7wA:9 a=QS2lbSrWcaBOJhTEi20A:7 a=vVewUZwoYg5q8MJAqlkI-CZUTdoA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] oil/water heat exchanger Date: Fri, 14 Aug 2009 07:14:19 -0800 Message-ID: <60E710ED1A864A5F934BB2D2E44F4F35@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01CA1CAE.D7A6CAC0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Importance: Normal Thread-Index: Acoc4T2WjA7XhqzlTrCnb92KhAkI3AAD09Ag In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0014_01CA1CAE.D7A6CAC0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Rino; =20 I've heard arguments for both ways; but one thing is for sure - for a = given heat exchanger size, you will get greater cooling of the oil by = installing it on the outlet side of the radiator. Typically the coolant there may = be 20 - 30 degrees cooler than at the engine outlet. You are also then = getting higher temp coolant to the radiator which allows it to reject more heat. =20 I had a similar situation, and installed a small oil/water exchanger = between rad outlet and the engine return and it works great. Oil side is in parallel with the oil/air cooler. Be careful about running two oil = coolers in series - the rotary has high oil flows, and most off the shelf oil coolers have too much pressure drop. =20 Al G =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino Sent: Friday, August 14, 2009 5:14 AM To: Rotary motors in aircraft Subject: [FlyRotary] oil/water heat exchanger =20 I need suggestions on installing an oil/water heat exchanger. My oil temp is too high and the water temp is too low in cruise. Should I install the exchanger between the water pump and radiator OR between the radiator out and the engine? I really do not know which is best. =20 Thanks Rino Lacombe Renesis powered Glass Goose ------=_NextPart_000_0014_01CA1CAE.D7A6CAC0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Rino;

 

I’ve heard arguments for = both ways; but one thing is for sure - for a given heat exchanger size, you = will get greater cooling of the oil by installing it on the outlet side of the radiator.  Typically the coolant there may be 20 – 30 degrees = cooler than at the engine outlet.  You are also then getting higher temp = coolant to the radiator which allows it to reject more heat.

 

I had a similar situation, and = installed a small oil/water exchanger between rad outlet and the engine return and = it works great.  Oil side is in parallel with the oil/air cooler. Be = careful about running two oil coolers in series – the rotary has high oil = flows, and most off the shelf oil coolers have too much pressure = drop.

 

Al G

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino
Sent: Friday, August 14, = 2009 5:14 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = oil/water heat exchanger

 

I need suggestions on = installing an oil/water heat exchanger.

My oil temp is too high and = the water temp is too low in cruise.

Should I install the = exchanger between the water pump and radiator OR between the radiator out and the = engine?

I really do not know which = is best.

 

Thanks

Rino = Lacombe

Renesis powered Glass = Goose

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