X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4311504 for flyrotary@lancaironline.net; Wed, 12 May 2010 00:34:43 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.52; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-85-113-131.mco.bellsouth.net[98.85.113.131]) by isp.att.net (frfwmhc02) with SMTP id <20100512043404H0200i2bu3e>; Wed, 12 May 2010 04:34:05 +0000 X-Originating-IP: [98.85.113.131] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: alternative water pump Date: Wed, 12 May 2010 00:34:16 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0030_01CAF16A.DB41F240" X-Mailer: Microsoft Office Outlook 11 Thread-Index: AcrxgrNRgmqdeonQRSaKRSbRa9cMmQACVe1g X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0030_01CAF16A.DB41F240 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 _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Wednesday, May 12, 2010 12:24 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: alternative water pump Will the Renesis pump capacity pump enough water to cool a 350 hp 3-rotor. Who knows? Frankly, I don't even know how much flow we're talking about here. For safety sake, if a better impeller was available, I would most likely buy it. Mark; As a point of reference; 260 hp, and 30 degree delta T needs about 40 gpm. You can scale up or down from there. At 6000 rpm I'm guessing the pump will give you that, but of course depends on the delta P around the loop. If you're expecting 350 hp, things might be marginal; basically higher delta T, which reduces overall effectiveness of the system a bit. But if you have some excess capacity there - - I guess you'll find out. Al G ------=_NextPart_000_0030_01CAF16A.DB41F240 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

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Wednesday, May 12, = 2010 12:24 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: alternative water pump

 

Will the Renesis pump capacity pump enough = water to cool a 350 hp 3-rotor.  Who knows?  Frankly, I don't even know = how much flow we're talking about here.  For safety sake, if a better = impeller was available, I would most likely buy it. =  

 

Mark;

As a point of reference; 260 hp, and 30 degree delta T needs about 40 gpm. = You can scale up or down from there.  At 6000 rpm I’m guessing the = pump will give you that, but of course depends on the delta P around the = loop.  If you’re expecting 350 hp, things might be marginal; basically = higher delta T, which reduces overall effectiveness of the system a bit. But if you = have some excess capacity there - - I guess you’ll find = out.

Al = G

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