X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao106.cox.net ([68.230.241.40] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTP id 2869537 for flyrotary@lancaironline.net; Wed, 23 Apr 2008 21:07:50 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.40; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao106.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080424010712.CRQN12496.fed1rmmtao106.cox.net@fed1rmimpo03.cox.net> for ; Wed, 23 Apr 2008 21:07:12 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo03.cox.net with bizsmtp id HD7C1Z00C1cVYgg04D7C4Y; Wed, 23 Apr 2008 21:07:12 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Cooling sytem changes- Velocity 20B Date: Wed, 23 Apr 2008 17:11:07 -0800 Message-ID: <000001c8a5a8$13898ed0$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C8A565.05664ED0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C8A565.05664ED0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 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=20 =20 Kelly; =20 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. =20 I estimate that in my installation the oil/water cooler is handling = about a third (or less) of the total oil heat load. =20 FWIW, =20 Al ------=_NextPart_000_0001_01C8A565.05664ED0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

    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_000_0001_01C8A565.05664ED0--