X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mimosa.digista.com ([72.233.53.10] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTPS id 5433845 for flyrotary@lancaironline.net; Thu, 08 Mar 2012 12:12:32 -0500 Received-SPF: none receiver=logan.com; client-ip=72.233.53.10; envelope-from=davidm@remconinc.com Received: from [192.168.1.109] (cdm-75-108-247-235.asbnva.dhcp.suddenlink.net [75.108.247.235] (may be forged)) by mimosa.digista.com (8.13.8/8.13.8) with ESMTP id q28HBuPZ014901 for ; Thu, 8 Mar 2012 11:11:56 -0600 X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.97.3 at mimosa Message-ID: <4F58E851.2020204@remconinc.com> Disposition-Notification-To: David Moyer Date: Thu, 08 Mar 2012 11:11:45 -0600 From: David Moyer User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Radiators References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080807080608020505050109" This is a multi-part message in MIME format. --------------080807080608020505050109 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit How many row are the Setrab oil coolers you are using? How do you have them plumbed? Do you have any pictures of your setup? David Moyer On 3/8/2012 10:43 AM, Lehanover@aol.com wrote: > I bought a very expensive Callies (the crank shaft people) oil to > water cooler to try on the racer. It worked just great. The first > weekend out the oil and water temps were the same. 190. Too high. It > turns out that water cools oil better than air. So I cut my new cooler > apart and found a conventional oil to air cooler inside a metal box. I > eventually used that as an oil to air cooler for the transmission. > Never to return to the idea again. > First you need to add more than a third more water radiator to deal > with the heat load. The added coolant runs and the bigger radiator add > way too much weight. > And the number one reason for not doing this is that the oil will > never be cooler than the water. You cannot cool oil to 160 degrees > using 180 degree water. You want oil to be 160 degrees or less and the > water not over 180. The oil pressure is fine at 80 PSI hot. Stock > relief valves in rotaries for years were set at 71.9 PSI. Also fine. > The bearings are way oversized for their loads. Plan for 10 GPM from a > stock pump (a ball park number) and 16 GPM from an aftermarket pump > using bigger bearing clearances. Do not use a Fram filter for any > application. Use Wicks (from NAPA) 350 pound burst cans, or K&N oil > filters with 550 pound burst cans. I use 3 Setrab oil coolers and two > K&N filters in my oiling system. Not a single failure since 1980. > Lynn E. Hanover > In a message dated 3/8/2012 8:39:50 A.M. Eastern Standard Time, > gordon@acumen-ea.com writes: > > That is interesting.Does anyone know what the max oil flow rate (@ > 6000 engine RPM) is through the cooler?I think I recall that we > are looking for around 80 psi oil pressure.Correct? > > Gordon C. Alling, Jr., PE > > President > > *acumen**/Engineering/Analysis, Inc./* > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --------------080807080608020505050109 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit How many row are the Setrab oil coolers you are using? How do you have them plumbed? Do you have any pictures of your setup?

David Moyer

On 3/8/2012 10:43 AM, Lehanover@aol.com wrote:

I bought a very expensive Callies (the crank shaft people) oil to water cooler to try on the racer. It worked just great. The first weekend out the oil and water temps were the same. 190. Too high. It turns out that water cools oil better than air. So I cut my new cooler apart and found a conventional oil to air cooler inside a metal box. I eventually used that as an oil to air cooler for the transmission. Never to return to the idea again.

First you need to add more than a third more water radiator to deal with the heat load. The added coolant runs and the bigger radiator add way too much weight.

And the number one reason for not doing this is that the oil will never be cooler than the water. You cannot cool oil to 160 degrees using 180 degree water. You want oil to be 160 degrees or less and the water not over 180. The oil pressure is fine at 80 PSI hot. Stock relief valves in rotaries for years were set at 71.9 PSI. Also fine. The bearings are way oversized for their loads. Plan for 10 GPM from a stock pump (a ball park number) and 16 GPM from an aftermarket pump using bigger bearing clearances. Do not use a Fram filter for any application. Use Wicks (from NAPA) 350 pound burst cans, or K&N oil filters with 550 pound burst cans. I use 3 Setrab oil coolers and two K&N filters in my oiling system. Not a single failure since 1980.

Lynn E. Hanover

In a message dated 3/8/2012 8:39:50 A.M. Eastern Standard Time, gordon@acumen-ea.com writes:

That is interesting. Does anyone know what the max oil flow rate (@ 6000 engine RPM) is through the cooler? I think I recall that we are looking for around 80 psi oil pressure. Correct?

Gordon C. Alling, Jr., PE

President

acumen Engineering/Analysis, Inc.
--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

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