X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [204.127.217.102] (HELO fmailhost01.isp.att.net) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTP id 2870202 for flyrotary@lancaironline.net; Thu, 24 Apr 2008 10:53:41 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.102; envelope-from=keltro@att.net Received: from fwebmail10.isp.att.net ([204.127.218.110]) by isp.att.net (frfwmhc02) with SMTP id <20080424145301H0200d6ia5e>; Thu, 24 Apr 2008 14:53:01 +0000 X-Originating-IP: [204.127.218.110] Received: from [64.250.199.66] by fwebmail10.isp.att.net; Thu, 24 Apr 2008 14:53:00 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Cooling sytem changes- Velocity 20B Date: Thu, 24 Apr 2008 14:53:00 +0000 Message-Id: <042420081453.336.48109EC900032F3B0000015022230647029B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 10 2008) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_336_1209048780_0" --NextPart_Webmail_9m3u9jl4l_336_1209048780_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Al, Thanks for the heads up info about this cooler........I would not put full coolent flow through this cooler but would do as you and Mark Steitle and take coolent flow from a bypass system so as not to cause a pressure drop to radiators............. -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from "Al Gietzen" : -------------- Beautiful installation (normal for you).........Just by chance I have an oil/water cooler exactly like yours in my part collection that I purchased from "Aeroquip" a few years ago just in case I needed it !!..........<:) It is bound to work on a 13B if it helps your 20B Kelly; Be aware that these units are limited by the water-side heat transfer. MoCal sells a flow restrictor (about $5) which forces more flow through the annular passages that are in close contact with the boundary between oil and coolant. Since I’m only putting about half the coolant flow through that cooler I put in the restrictor which significantly improves the performance. If your planning on full flow, you would want to check the pressure drop curves before putting in a restrictor. I estimate that in my installation the oil/water cooler is handling about a third (or less) of the total oil heat load. FWIW, Al --NextPart_Webmail_9m3u9jl4l_336_1209048780_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_336_1209048780_1" --NextPart_Webmail_9m3u9jl4l_336_1209048780_1 Content-Type: text/html Content-Transfer-Encoding: 8bit

Al,

Thanks for the heads up info about this cooler........I would not

put full coolent flow through this cooler but would do as you and

Mark Steitle and take coolent flow from a bypass system so as not

to cause a pressure drop to radiators.............

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- Original message from "Al Gietzen" <ALVentures@cox.net>: --------------

Beautiful installation (normal for you).........Just by chance I have an

oil/water cooler exactly like yours in my part collection that I purchased

from "Aeroquip" a few years ago just in case I needed it !!..........<:) It is bound to work on a 13B if it helps your 20B

Kelly;

Be aware that these units are limited by the water-side heat transfer. MoCal sells a flow restrictor (about $5) which forces more flow through the annular passages that are in close contact with the boundary between oil and coolant. Since I’m only putting about half the coolant flow through that cooler I put in the restrictor which significantly improves the performance. If your planning on full flow, you would want to check the pressure drop curves before putting in a restrictor.

I estimate that in my installation the oil/water cooler is handling about a third (or less) of the total oil heat load.

FWIW,

Al

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