X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [204.127.217.105] (HELO fmailhost01.isp.att.net) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTP id 2870424 for flyrotary@lancaironline.net; Thu, 24 Apr 2008 13:41:58 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.105; envelope-from=keltro@att.net Received: from fwebmail01.isp.att.net ([204.127.218.101]) by isp.att.net (frfwmhc05) with SMTP id <20080424174118H0500ni9u3e>; Thu, 24 Apr 2008 17:41:18 +0000 X-Originating-IP: [204.127.218.101] Received: from [64.250.199.66] by fwebmail01.isp.att.net; Thu, 24 Apr 2008 17:41:18 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Re: Cooling sytem changes- Velocity 20B Date: Thu, 24 Apr 2008 17:41:18 +0000 Message-Id: <042420081741.28029.4810C63D00089B6D00006D7D22218865869B0A02D29B9B0EBF019D9B040A05@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_28029_1209058878_0" --NextPart_Webmail_9m3u9jl4l_28029_1209058878_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Al, I have the C43 (330mm) cooler that appears to be the same size as yours.......Is the restrictor you used the "Partial flow Restrictor" (LWT-43)? -- 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_28029_1209058878_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_28029_1209058878_1" --NextPart_Webmail_9m3u9jl4l_28029_1209058878_1 Content-Type: text/html Content-Transfer-Encoding: 8bit

Al,

I have the C43 (330mm) cooler that appears to be the same size as

yours.......Is the restrictor you used the "Partial flow Restrictor" (LWT-43)?

--
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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