X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTP id 4083413 for flyrotary@lancaironline.net; Fri, 15 Jan 2010 02:09:27 -0500 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet2.per.eftel.com (Postfix) with ESMTP id 189C017388F for ; Fri, 15 Jan 2010 15:08:48 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 35DFBBEC007 for ; Fri, 15 Jan 2010 15:08:48 +0800 (WST) Message-ID: <006268BB0D5C488CBAAB07379A71F81D@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Scoops Date: Fri, 15 Jan 2010 17:08:49 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01CA9605.67F47F80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 100114-1, 01/14/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000D_01CA9605.67F47F80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Al, Sorry my notes don't ID the source, I understand what your saying and = you may be correct, there could be a whole host of variables, however I = found it interesting enough to record the conclusion. Matter of fact I still find it hard to believe, but I have since found = people that have found a minor inclined Rad to be less desirable than = vertical, so feel that it may hold true for any installation - 55* does = sound a lot doesn't it. George ( down under) Thomas, Nice research. I found my notes on inclined radiators, they state 1. 0-20/30* will decrease cooling and increase drag. 2. Over 30* things improve. 3. At approx 55* cooling effectiveness is 30% greater than = non-inclined rads=20 and drag is less by 20%. George; do you have the source for that info? It may be a good idea to = verify this information. I don't recall the specifics; but what I do = recall is that the conclusion was configuration dependant, and should = not be taken as generally applicable. Sorry, but I don't remember what = the factors were; maybe something about the configuration of the core. Or maybe my memory just isn't right. Worth checking. All ------=_NextPart_000_000D_01CA9605.67F47F80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Al,
Sorry my notes don't ID the source, I=20 understand  what your saying and you may be correct, there could be = a whole=20 host of variables, however I found it interesting enough to record the=20 conclusion.
 
Matter of fact I still find it hard to = believe, but=20 I have since found people that have found a minor inclined Rad to = be less=20 desirable than vertical, so feel that it may hold true for any = installation -=20 55* does sound a lot doesn't it.
George ( down under)

 

Thomas,

Nice research.

I=20 found my notes on inclined radiators, they state

1. 0-20/30* will decrease cooling and = increase=20 drag.

2. Over 30* things = improve.

3. At approx 55* cooling effectiveness is = 30% greater=20 than non-inclined rads

and drag is less by 20%.

 

George; = do you=20 have the source for that info? It=20 may be a good idea to verify this information.  I don=92t = recall the=20 specifics; but what I do recall is that the conclusion was = configuration=20 dependant, and should not be taken as generally applicable.  = Sorry, but I=20 don=92t remember what the factors were; maybe something about the = configuration=20 of the core.

Or maybe = my memory=20 just isn=92t right.  Worth checking.

All

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