X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4312058 for flyrotary@lancaironline.net; Wed, 12 May 2010 11:55:52 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100512155515.FIZS1969.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Wed, 12 May 2010 11:55:15 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo01.cox.net with bizsmtp id GfvG1e0074S1t5C03fvGFq; Wed, 12 May 2010 11:55:16 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=cnbFproiWJRJ9R5Ra84R6dpMd929KZAD6MF01mSBA8Y= c=1 sm=1 a=zk8b5mKjuVwA:10 a=ood2b7iyd8MA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=iOkV8QQs64naO1rSwX0A:9 a=I1UrQnGoGgIY42w3pnpBD1PbQiMA:4 a=CjuIK1q_8ugA:10 a=6Hec0gMy3U4u33hfYDYA:9 a=NIgCO--nGseEN7_AaUcA:7 a=p05-mzvjArSgL0ktUV9Q8hP5HZ0A:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: alternative water pump Date: Wed, 12 May 2010 08:54:40 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01CAF1B0.C207CE30" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: AcrxjHQoTXQtMvWXQhmiOMyekD4pmQAZpVug X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0010_01CAF1B0.C207CE30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Al, Are you sure of the 40 GPM? That seems like a lot. My radiator in/out is 1.25 inches, so the water would be traveling at 628 feet per minute at that flow rate. That is over 7 miles per hour! Bill B When my 20B (with a 13B pump that Atkins referred to as 'high flow') was on the dyno the measured flow was 48 gpm with the standard pulleys. I expect the dyno cooling loop was fairly low pressure drop compared to our typical systems, so I'm just guessing 40 gpm is in the ballpark. 628 fpm (10.5 ft/sec) would not be considered very high - - above 15 ft/sec I'd consider high. Al ------=_NextPart_000_0010_01CAF1B0.C207CE30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Al,=

Are you sure of = the 40 GPM?  That seems like a lot.  My radiator in/out is 1.25 = inches, so the water would be traveling at 628 feet per minute at that flow = rate.  That is over 7 miles per hour!

 

Bill B

When my 20B (with a 13B pump that Atkins referred to as ‘high = flow’) was on the dyno the measured flow was 48 gpm with the standard = pulleys.  I expect the dyno cooling loop was fairly low pressure drop compared to = our typical systems, so I’m just guessing 40 gpm is in the = ballpark.  628 fpm (10.5 ft/sec) would not be considered very high - - above 15 = ft/sec I’d consider high.

Al

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