Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 322382 for flyrotary@lancaironline.net; Thu, 15 Jul 2004 11:13:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040715151238.UQUC1775.imf19aec.mail.bellsouth.net@rd> for ; Thu, 15 Jul 2004 11:12:38 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: New Scoop Date: Thu, 15 Jul 2004 10:12:52 -0500 Message-ID: <004e01c46a7e$330cd8c0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004F_01C46A54.4A36D0C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_004F_01C46A54.4A36D0C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I know there are some fairly reliable overall estimates of the drag of an RV (CAFE reports and others), so if an reasonably estimate of cooling drag could be calculated then we could sort of determine how much cooling drag is or is not affecting your overall performance. Thanks for the thoughts. I would be interesting to know just how much is at stake, in order to make better compromise decisions with regard to cooling. I'd have to know that there was a lot to be gained in cruise speed before I'd accept marginal climb cooling. At the moment, I have bigger drag issues that need to be addressed first, but some of these have to wait for the completion of Rev-3, to see if I have to reposition the cowl. Your radiator cooling capacity would certainly appear to be more than you need given your low coolant temps (assuming they are close to the money) with your current set up. But, the 2.85 and higher rpm producing more power will eat up some of that. Don't worry, I'm not doing anything to reduce cooling capacity until I get the C drive and prop installed and tested. If there's any capacity left over, there's always rev-4. I have a feeling the new motorcycle hobby, and depressed market for my RX-7 will keep me from buying a $2000 supercharger. Cheers, Rusty (welding on the training wheels later) ------=_NextPart_000_004F_01C46A54.4A36D0C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
   I know there are = some fairly=20 reliable overall estimates of the drag of an RV (CAFE reports and = others), so if=20 an reasonably estimate of cooling drag could be calculated then we could = sort of=20 determine how much cooling drag is or is not affecting your overall=20 performance. 
 
Thanks for the thoughts.  I would be = interesting to=20 know just how much is at stake, in order to make better compromise = decisions=20 with regard to cooling.  I'd have to know that there was a lot = to be=20 gained in cruise speed before I'd accept marginal climb=20 cooling.  At the moment, I have bigger drag issues that = need=20 to be addressed first, but some of these have to wait for the = completion of=20 Rev-3, to see if I have to reposition the=20 cowl.     
 
  Your radiator cooling capacity = would=20 certainly appear to be more than you need given your low coolant temps = (assuming=20 they are close to the money) with your current set up.  But, the = 2.85 and=20 higher rpm producing more power will eat up some of that.
 
Don't=20 worry, I'm not doing anything to reduce cooling capacity until I = get=20 the C drive and prop installed and tested.  If there's any = capacity=20 left over, there's always rev-4.  I have a feeling = the new=20 motorcycle hobby, and depressed market for my RX-7 will keep = me from=20 buying a $2000 supercharger.  
 
Cheers,
Rusty=20 (welding on the training wheels later)  
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