X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nskntmtas01p.mx.bigpond.com ([61.9.168.137] verified) by logan.com (CommuniGate Pro SMTP 6.0) with ESMTP id 5967228 for flyrotary@lancaironline.net; Mon, 24 Dec 2012 23:30:09 -0500 Received-SPF: pass receiver=logan.com; client-ip=61.9.168.137; envelope-from=neil.unger@bigpond.com Received: from nskntcmgw09p ([61.9.169.169]) by nskntmtas01p.mx.bigpond.com with ESMTP id <20121225042933.TWUW25972.nskntmtas01p.mx.bigpond.com@nskntcmgw09p> for ; Tue, 25 Dec 2012 04:29:33 +0000 Received: from UserPC ([124.180.46.213]) by nskntcmgw09p with BigPond Outbound id fgVV1k00G4byNB801gVWn6; Tue, 25 Dec 2012 04:29:33 +0000 X-Authority-Analysis: v=2.0 cv=APSpfbFe c=1 sm=1 a=hPsOgbr6+L8aOEXSGVuwXA==:17 a=ERb7-GrRVPAA:10 a=JDadKst33uMA:10 a=1IlZJK9HAAAA:8 a=3UNKV3TxbicA:10 a=HHGDD-5mAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=JLyK4mnyOhFFYi4CxCkA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=i1zE5R4R5dEA:10 a=U0hW1ESRGwYEPbYg574A:9 a=_W_S_7VecoQA:10 a=tXsnliwV7b4A:10 a=EzXvWhQp4_cA:10 a=hrIKzZR6DcRzkMDQ:21 a=hPsOgbr6+L8aOEXSGVuwXA==:117 Message-ID: <60BA6099E09F49CDB4FBEA558570C8FE@UserPC> From: "Neil Unger" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Cooling Duct design Date: Tue, 25 Dec 2012 15:29:23 +1100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01CDE2B4.9E3645C0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_000F_01CDE2B4.9E3645C0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Steve, I am in NSW but you have quite a few rotaries flying in WA = especially to the south around bunbury. What plane are you talking? I = have a glastar with an underneath heat exchanger, but depends where you = are up to as to what you have to =E2=80=9Cmake=E2=80=9D fit. Neil.=20 From: Stephen Izett=20 Sent: Tuesday, December 25, 2012 12:01 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Cooling Duct design Mark=20 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, =20 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 =20 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 ------=_NextPart_000_000F_01CDE2B4.9E3645C0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Steve,
            = I am in=20 NSW but you have quite a few rotaries flying in WA especially to the = south=20 around bunbury.  What plane are you talking?  I have a glastar = with an=20 underneath heat exchanger, but depends where you are up to as to what = you have=20 to =E2=80=9Cmake=E2=80=9D fit.  Neil.
 
Sent: Tuesday, December 25, 2012 12:01 PM
Subject: [FlyRotary] Re: Cooling Duct = design
 
Mark=20
 
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, =20
 
Referring to the top view drawing, my guess is the majority of = the air=20 would favor the top half of the core, starving the other half of = air.  I=20 think I would try to duplicate the long curved duct wall on both = sides,=20 forming a trumpet shape nearest the core.  On the side-view = drawing, my=20 guess is the majority of the cooling air would pile up on the = back/downwind=20 side.  I would squeeze it down to almost nothing at the = backside. =20 Then take some manometer readings and adjust as appropriate.  =
 
Be sure you have free space behind the radiator for the air to = exit the=20 core, and adequate cowl opening(s).  I had to add a cowl flap to = my=20 Lancair, but it really helps during hot weather climb-outs.  When = up into=20 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=20 water exchanger.
Can some of you guys with operating setups = critique the=20 design please.
So it consists of a K&Mish diffuser followed = by a=20 wedge.



And a happy Christmas to you all.

Steve = Izett
Perth Western Australia

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l

 
 
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