X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nk11p08mm-asmtp002.mac.com ([17.158.58.247] verified) by logan.com (CommuniGate Pro SMTP 6.0) with ESMTP id 5967167 for flyrotary@lancaironline.net; Mon, 24 Dec 2012 20:01:42 -0500 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.247; envelope-from=steveizett@me.com MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_HGtZlsb8yV08EGtb5ftcEw)" Received: from [10.1.1.6] (58-7-170-26.dyn.iinet.net.au [58.7.170.26]) by nk11p08mm-asmtp002.mac.com (Oracle Communications Messaging Server 7u4-26.01(7.0.4.26.0) 64bit (built Jul 13 2012)) with ESMTPSA id <0MFK00KMOATSEW30@nk11p08mm-asmtp002.mac.com> for flyrotary@lancaironline.net; Tue, 25 Dec 2012 01:01:09 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.9.8327,1.0.431,0.0.0000 definitions=2012-12-24_07:2012-12-24,2012-12-24,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=2 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1203120001 definitions=main-1212240305 From: Stephen Izett Subject: Re: [FlyRotary] Re: Cooling Duct design Date: Tue, 25 Dec 2012 09:01:03 +0800 In-reply-to: To: Rotary motors in aircraft References: Message-id: X-Mailer: Apple Mail (2.1283) --Boundary_(ID_HGtZlsb8yV08EGtb5ftcEw) Content-type: text/plain; CHARSET=US-ASCII Content-transfer-encoding: 7BIT Mark What were your final dimensions: Inlet water and oil Exits Exchanger sizes Thanks Steve Izett On 24/12/2012, at 11:12 PM, Mark Steitle wrote: > Hi Steve, > > Referring to the top view drawing, my guess is the majority of the air would favor the top half of the core, starving the other half of air. I think I would try to duplicate the long curved duct wall on both sides, forming a trumpet shape nearest the core. On the side-view drawing, my guess is the majority of the cooling air would pile up on the back/downwind side. I would squeeze it down to almost nothing at the backside. Then take some manometer readings and adjust as appropriate. > > Be sure you have free space behind the radiator for the air to exit the core, and adequate cowl opening(s). I had to add a cowl flap to my Lancair, but it really helps during hot weather climb-outs. When up into cooler air I usually close the cowl flap for reduced cooling drag. > > Mark S. > Lancair ES - PP 20B - 258 hrs > > On Mon, Dec 24, 2012 at 1:32 AM, Stephen Izett wrote: > Hi Guys > > I'm about to construct the diffuser for the water exchanger. > Can some of you guys with operating setups critique the design please. > So it consists of a K&Mish diffuser followed by a wedge. > > > > And a happy Christmas to you all. > > Steve Izett > Perth Western Australia > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > --Boundary_(ID_HGtZlsb8yV08EGtb5ftcEw) Content-type: text/html; CHARSET=US-ASCII Content-transfer-encoding: quoted-printable

Hi = Steve,

Referring to the top view drawing, my = guess is the majority of the air would favor the top half of the core, = starving the other half of air. I think I would try to duplicate = the long curved duct wall on both sides, forming a trumpet shape nearest = the core. On the side-view drawing, my guess is the majority of = the cooling air would pile up on the back/downwind side. I would = squeeze it down to almost nothing at the backside. Then take some = manometer readings and adjust as appropriate.

Be sure you have free space behind the radiator for = the air to exit the core, and adequate cowl opening(s). I had to = add a cowl flap to my Lancair, but it really helps during hot weather = climb-outs. When up into cooler air I usually close the cowl flap = for reduced cooling drag.

Mark S.
Lancair ES - PP 20B - 258 hrs =

On Mon, Dec 24, 2012 at = 1:32 AM, Stephen Izett <steveizett@me.com> wrote:

Hi Guys

I'm about to construct the diffuser for the water exchanger.
Can some of you guys with operating setups critique the design = please.
So it consists of a K&Mish diffuser followed by a wedge.

And a happy Christmas to you all.

Steve Izett
Perth Western Australia

--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.ht= ml

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