X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao101.cox.net ([68.230.241.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3860639 for flyrotary@lancaironline.net; Sun, 20 Sep 2009 23:48:17 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao101.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090921034744.HBFO16492.fed1rmmtao101.cox.net@fed1rmimpo03.cox.net> for ; Sun, 20 Sep 2009 23:47:44 -0400 Received: from wills ([68.105.90.215]) by fed1rmimpo03.cox.net with bizsmtp id jFnh1c00C4emyWU04FnjiK; Sun, 20 Sep 2009 23:47:43 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=5RvM0Nif2WQA:10 a=3oc9M9_CAAAA:8 a=7g1VtSJxAAAA:8 a=Ia-xEzejAAAA:8 a=LqS9Z6hJIDHadnmvSDkA:9 a=Q44GJ9zA93rhtM4mwgsA:7 a=6CRBqUUJzoUFD_Ea_9qa5hC51qoA:4 a=U8Ie8EnqySEA:10 a=Uy85ENV67YeoJcQUTCoA:9 a=6B5JMOfCC97QPHgXEB8A:7 a=MA15yCZ5AcgbGlejo1n_DN7LxosA:4 a=EzXvWhQp4_cA:10 X-CM-Score: 0.00 Message-ID: <46516BCD2AB54F4AB74E0F2EA72D9220@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Another mixed day / Cooling experiments Date: Sun, 20 Sep 2009 20:47:42 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003F_01CA3A33.993DAEA0" 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 This is a multi-part message in MIME format. ------=_NextPart_000_003F_01CA3A33.993DAEA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable My oil cooler and radiator share a common exit. Its working fine so far. Mike Wills RV-4 N144MW ----- Original Message -----=20 From: SHIPCHIEF@aol.com=20 To: Rotary motors in aircraft=20 Sent: Sunday, September 20, 2009 5:20 PM Subject: [FlyRotary] Re: Another mixed day / Cooling experiments Tracy & All; I'm concerned about mixing the hot air out-flow from different = coolers, then expecting them to 'share' a common exit from the cowl on = my RV-8. I started with two evap cores for a radiator, on the right side like = Tracy's RV-8, except I directed the air to the engine side of the = cooler, then out thru the cowl side. It did not work with a simple = pressure cowl, and had too many suppport struts to work with an inlet = diffuser duct. My oil cooler was at the bottom, and oil temp was never a = problem. So I moved the oil cooler up to the right side and made an inlet = diffuser for it. I got a fairly standard Griffin radiator which I put = under the engine with a new scoop at the front, ala Dave Leonard. The = radiator air now exits in the bottom.=20 The left cowl inlet is for engine combustion air and surface cooling = of the exhaust/turbo, and fuel injectors.=20 The radiator exit/inlet ratio is 1.3:1. The additional air from the = left inlet might 'choke' the bottom outlet, so if testing confirms this, = I'll have to make a left side cowl exit too. Think of Fw 190 and Grumman Bearcat. They had cowl side exits and were = quite fast aircraft. The attachment is showing the right side of my RV-8, with the newly = installed radiator scoop and the relocated oil cooler with it's inlet = diffuser. The exit holes are too big because they were sized for the = radiators. I'm going to keep them as-is until the next engine run. With = louvers covering. I'm still reworking the plumbing for the turbo oil drain, the = radiator, and the fuel return line. -------------------------------------------------------------------------= ----- -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_003F_01CA3A33.993DAEA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
My oil cooler and radiator share a = common exit. Its=20 working fine so far.
 
Mike Wills
RV-4 N144MW
----- Original Message -----
From:=20 SHIPCHIEF@aol.com
Sent: Sunday, September 20, = 2009 5:20=20 PM
Subject: [FlyRotary] Re: = Another mixed=20 day / Cooling experiments

Tracy & All;
I'm concerned = about mixing=20 the hot air out-flow from different coolers, then expecting them to = 'share' a=20 common exit from the cowl on my RV-8.
I started with two evap cores = for a=20 radiator, on the right side like Tracy's RV-8, except I directed the = air to=20 the engine side of the cooler, then out thru the cowl side. It did not = work=20 with a simple pressure cowl, and had too many suppport struts to work = with an=20 inlet diffuser duct. My oil cooler was at the bottom, and oil temp was = never a=20 problem.
So I moved the oil cooler up to the right side and made an = inlet=20 diffuser for it. I got a fairly standard Griffin radiator which I put = under=20 the engine with a new scoop at the front, ala Dave Leonard. The = radiator air=20 now exits in the bottom.
The left cowl inlet is for engine = combustion air=20 and surface cooling of the exhaust/turbo, and fuel injectors.
The = radiator=20 exit/inlet ratio is 1.3:1. The additional air from the left inlet = might=20 'choke' the bottom outlet, so if testing confirms this, I'll have to = make a=20 left side cowl exit too.
Think of Fw 190 and Grumman Bearcat. They = had cowl=20 side exits and were quite fast aircraft.
The attachment is showing = the=20 right side of my RV-8, with the newly installed radiator scoop and the = relocated oil cooler with it's inlet diffuser. The exit holes are too = big=20 because they were sized for the radiators. I'm going to keep them = as-is until=20 the next engine run. With louvers covering.
I'm still reworking the = plumbing for the turbo oil drain, the radiator, and the fuel return=20 line.

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