X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4315834 for flyrotary@lancaironline.net; Sat, 15 May 2010 20:22:37 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao105.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100516002201.POGY20564.fed1rmmtao105.cox.net@fed1rmimpo02.cox.net> for ; Sat, 15 May 2010 20:22:01 -0400 Received: from BigAl ([174.65.188.54]) by fed1rmimpo02.cox.net with bizsmtp id J0Lh1e00F1ArRLm040LhTn; Sat, 15 May 2010 20:20:41 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=RDGknaWEColYBAosNzHWAUqP/VR6Ab6kioi0WieaKDU= c=1 sm=1 a=zk8b5mKjuVwA:10 a=ood2b7iyd8MA:10 a=KDuwdIr/YLANGuoY0nAeCQ==:17 a=_S0IYr-PVP8r23qZfkMA:9 a=w2KlFSP2-NwRXe4BgZb1jJ5_fYgA:4 a=CjuIK1q_8ugA:10 a=HRhxQBBJyafbmsPqmkEA:9 a=a1xvueVHtatxsxJWxi8A:7 a=vLlBVzWj2wMTbg0S4HmMpl1y7CEA:4 a=KDuwdIr/YLANGuoY0nAeCQ==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: alternative water pump Date: Sat, 15 May 2010 17:21:32 -0800 Message-ID: <8AAA0DB8DBCE40D5BEBA576A1F6B529B@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0019_01CAF453.106E08B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 In-reply-to: Thread-index: Acr0M1RmQ3Hh5E6KRqigL55QLQ/c+AAYkmwg This is a multi-part message in MIME format. ------=_NextPart_000_0019_01CAF453.106E08B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable On the water. The flow is high enough that very little temperature drop through the radiators is required to remove the heat from the engine. Q = =3D (mass flow)*(heat-capacity)*(delta-T). If you increase the mass flow, = you decrease the deltaT. I get about a 5*F delta T on the radiators, on the other hand, the air coming out of the rads is about 100F higher than the = air going in. I may have missed something cuz I wasn't really following this thread, = but the 5o seems 'unusual' to me as well. What power level is the engine = running at when you have this delta T? =20 Al ------=_NextPart_000_0019_01CAF453.106E08B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

On the water. The flow is = high enough that very little temperature drop through the radiators is = required to remove the heat from the engine. Q =3D (mass = flow)*(heat-capacity)*(delta-T). If you increase the mass flow, you decrease the deltaT.  I get about a = 5*F delta T on the radiators, on the other hand, the air coming out of the = rads is about 100F higher than the air going in.

I may have missed something cuz I = wasn’t really following this thread, but the 5o seems = ‘unusual’ to me as well. What power level is the engine running at when you have = this delta T?

 

Al

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