Return-Path: Received: from [65.54.168.108] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 575547 for flyrotary@lancaironline.net; Tue, 21 Dec 2004 12:33:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.108; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 21 Dec 2004 09:33:00 -0800 Message-ID: Received: from 65.54.97.150 by BAY3-DAV4.phx.gbl with DAV; Tue, 21 Dec 2004 17:32:48 +0000 X-Originating-IP: [65.54.97.150] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Oil coolers Date: Tue, 21 Dec 2004 12:32:45 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0179_01C4E759.2C10CA60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Tue, 21 Dec 2004 12:32:45 -0500 X-OriginalArrivalTime: 21 Dec 2004 17:33:00.0973 (UTC) FILETIME=[1E62A5D0:01C4E783] This is a multi-part message in MIME format. ------=_NextPart_000_0179_01C4E759.2C10CA60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message = http://www.fluidyne.com/pl_theoc.html =20 Really liked the DB 30517 (3.75" thick double pass model) Will = probably use this one on my -8. =20 Tracy =20 Perhaps you mean use "two" instead of "this one". I looked closely = (longingly) at the fluidyne when I was in the market for a cooler; but = they just don't make on with the capacity for the 20B. One DB 30517 = would handle neither the flow nor heat rejection needed; however 2 in = parallel would do it. At least that's what my analysis says. Al Nope, at least I don't think so. Here's my take on it. =20 The Mazda cooler has 180 CU In. core area and gives me enough cooling = for the 13B. I'm assuming for now that the dimensions for the Fluidyne = are core area (must check) which give it 275 cu in, which is 153% of the = Mazda. Pretty good match, at least on paper. The "effectiveness = quotient" for the Fluidyne at almost double the thickness is not as = good but I'm hoping the much better ducting and pressure recovery on the = -8 will cancel that out. The higher delta T air temp will give less = cooling drag, at least in my universe : ) In any case, the main -8 mission calls for 100 HP at >=3D18,000 ft. = It'll work. Tracy (please don't ask me to define "effectiveness quotient") ------=_NextPart_000_0179_01C4E759.2C10CA60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 

 

http://www.fluidyne.com/pl_theoc.html =20

 

 Really liked=20 the DB 30517 (3.75" thick double pass model)  Will probably use = this one=20 on my -8.   

 

 Tracy   

 

Perhaps you = mean use=20 =93two=94 instead of =93this one=94.  I looked closely = (longingly) at the=20 fluidyne when I was in the market for a cooler; but they just don=92t = make on=20 with the capacity for the 20B.  One DB 30517 would handle neither = the=20 flow nor heat rejection needed; however 2 in parallel would do = it.  At=20 least that=92s what my analysis says.

 

Al

 

 Nope, at=20 least I don't think so.   Here's my take on it.  =20

 

The=20 Mazda cooler has 180 CU In. core area and gives me enough cooling for = the=20 13B.  I'm assuming for now that the dimensions for the Fluidyne = are core=20 area (must check) which give it 275 cu in, which is 153% of the = Mazda. =20 Pretty good match, at least on paper.   The "effectiveness=20 quotient"  for the Fluidyne at almost double the thickness is not = as good=20 but I'm hoping the much better ducting and pressure recovery on the -8 = will=20 cancel that out.  The higher delta T air temp will give less = cooling=20 drag, at least in my universe : )

 

In=20 any case,  the main -8 mission calls for 100 HP at  = >=3D18,000=20 ft.  It'll work.

 

 Tracy   (please don't ask me to define "effectiveness=20 = quotient")

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