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 3853990 for flyrotary@lancaironline.net; Tue, 15 Sep 2009 21:12:28 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.45; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao101.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090916011154.OYKL16492.fed1rmmtao101.cox.net@fed1rmimpo01.cox.net> for ; Tue, 15 Sep 2009 21:11:54 -0400 Received: from BigAl ([72.192.133.78]) by fed1rmimpo01.cox.net with bizsmtp id hDBt1c00R1hf1Cg03DBtcT; Tue, 15 Sep 2009 21:11:54 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=Ia-xEzejAAAA:8 a=K50XEepPVZIXESU8h4IA:9 a=8vx_lPc5gOTLKosdwZoUjdFfwocA:4 a=EzXvWhQp4_cA:10 a=S45kJ2C8OisRvwKP:21 a=J0lSclTwPFExk8F8:21 a=8O1dR6ZgbOY3OdJsNdAA:9 a=aOJfGFjcOnhQho_ND58A:7 a=lwbhHdab1E6SwmYwTcimT2pzKYoA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] cooling Date: Tue, 15 Sep 2009 18:11:26 -0800 Message-ID: <171F0932FB2A4AF0BB264925A67301CA@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01CA362F.F12CD350" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal Thread-Index: Aco2ZvzXy1RcNTo0RCWR27fdwtvIJgACyNAg This is a multi-part message in MIME format. ------=_NextPart_000_004C_01CA362F.F12CD350 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable John; =20 It is unlikely that the NACA duct will do anything. The duct leading = away should be at least as large, or larger, than the rectangular opening of = the scoop. Also, it looks like the air has to make a sudden 90 degree turn = to go into the tube. It's not going to want to do that, so the air will = just spill around the scoop. =20 Is there some reason to expect that the pump needs cooling? You can = just insolate the pump from surrounding heat; and internal heat generated is carried away by the fuel. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John Sent: Tuesday, September 15, 2009 4:45 PM To: Rotary motors in aircraft Subject: [FlyRotary] cooling =20 Today I ran the plane with the cowling on and I had it tied down. =20 OAT 80 WT 220 and climbing OilT 195 MP 28 RPM 5000 After about 4 minutes the water and oil temps started to climb and the engine started missing. =20 2 questions - will these temperatures stabilize with the plane in motion = and or climbing out. will the NACA duct in it's present location at the = rear of the cowling cool the fuel pump. Enclosed are two pictures of the = pump enclosure and the NACA duct. The NACA duct has a 1 inch tube going down into the pump enclosure. The engine ran ok when I switched it to carburetion. The fuel pump line was hot. It ran fine on the FI this evening as it had cooled and I had the cowling off. JohnD Your message is ready to be sent with the following file or link attachments: 006 005 ------=_NextPart_000_004C_01CA362F.F12CD350 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

John;

 

It is unlikely that the NACA duct = will do anything.  The duct leading away should be at least as large, or = larger, than the rectangular opening of the scoop.  Also, it looks like the = air has to make a sudden 90 degree turn to go into the tube. =  It’s not going to want to do that, so the air will just spill around the = scoop. 

Is there some reason to expect = that the pump needs cooling?  You can just insolate the pump from = surrounding heat; and internal heat generated is carried away by the = fuel.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John
Sent: Tuesday, September = 15, 2009 4:45 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = cooling

 

Today I ran the plane with = the cowling on and I had it tied down. 

OAT    &= nbsp; 80

WT    &n= bsp;  220  and climbing

OilT    =   195

MP    &n= bsp;    28

RPM    = 5000

After about 4 minutes the = water and oil temps started to climb and the engine started = missing.

 

2 questions - will these temperatures stabilize with the plane in motion and or climbing = out.

    &nbs= p;            = ;   will the NACA duct in it's present location at the rear  of the = cowling cool the fuel pump.  Enclosed are two pictures of the pump = enclosure and the NACA duct.  The NACA duct has a 1 inch tube going down into the = pump enclosure.  The engine ran ok when I switched it to = carburetion.  The fuel pump line was hot.  It ran fine on the FI this evening as it = had cooled and I had the cowling off.  JohnD

Your message is ready to be sent with the following file or link = attachments:
006
005

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