Return-Path: Received: from out005.verizon.net ([206.46.170.143] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2753009 for flyrotary@lancaironline.net; Thu, 20 Nov 2003 08:51:49 -0500 Received: from netzero.net ([4.4.61.254]) by out005.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20031120135147.MOVY6248.out005.verizon.net@netzero.net> for ; Thu, 20 Nov 2003 07:51:47 -0600 Message-ID: <3FBCC6F2.8040204@netzero.net> Date: Thu, 20 Nov 2003 08:51:46 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Core vs Radistor was Re: [FlyRotary] radiator References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------070403000900030404000708" X-Authentication-Info: Submitted using SMTP AUTH at out005.verizon.net from [4.4.61.254] at Thu, 20 Nov 2003 07:51:47 -0600 This is a multi-part message in MIME format. --------------070403000900030404000708 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit I believe that was vortex generators, not difusers. Finn james coffman wrote: >Watch out for naca ducting for cooling. they have a >reputation for not working. Having said that, look at >an article in this months Sport Aviation. I forgot the >plane type, but using the naca duct on an IO-540. It >completely failed in several positions until he added >difusers (sp) in front. Now works fine. There are >pictures. Interesting! Jim Coffman >--- "sqpilot@earthlink" wrote: > > >>Message >> ----- Original Message ----- >> From: Ed Anderson >> To: Rotary motors in aircraft >> Sent: Wednesday, November 19, 2003 7:16 PM >> Subject: [FlyRotary] Re: Core vs Radistor was Re: >>[FlyRotary] radiator >> >> >> Boy, you catch me every time{:>) >> >> Thanks for the info Rusty >> >> Paul, >> >> I calculate out Rusty's radiator to have a >>volume of 17.5*24.25*2.25 = 964 in^3. Given that he >>was running a turbo, he would naturally want/need >>more cooling capacity than a NA block. So his basic >>radiator was approx 50% large in volume than two >>cores. Since he could produce up to that much >>additional power with his turbo, it would appear >>that his is sized about right - perhaps a bit on the >>large size since he probably would not run under >>high boost at cruise. >> >> MESSAGE CUT TO SAVE DOWNLOAD TIME, ETC >> >> IBut, in any case, I think your currently >>planned radiator size is undersized. FWIW - always >>keepin mind my knowledge of radiators and cooling is >>quite limited. >> >> >> Ed >> >> Ed Anderson >> RV-6A N494BW Rotary Powered >> Matthews, NC >> eanderson@carolina.rr.com >> Your knowledge of radiators and cooling may be >>limited....however, my knowledge of radiators and >>cooling could be written on the head of a match. >>Thanks for your valuable input, Ed. I was trying to >>come up with a radiator that could be placed >>directly in front of the NACA duct, as Al Wick did. >>I will probably go with a larger radiator, EWP and >>fan. Thanks again. Paul Conner >> >> >> > > >__________________________________ >Do you Yahoo!? >Protect your identity with Yahoo! Mail AddressGuard >http://antispam.yahoo.com/whatsnewfree > > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >>> > > > > --------------070403000900030404000708 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit I believe that was vortex generators, not difusers.

Finn

james coffman wrote:

Watch out for naca ducting for cooling. they have a
reputation for not working.  Having said that, look at
an article in this months Sport Aviation. I forgot the
plane type, but using the naca duct on an IO-540.  It
completely failed in several positions until he added
difusers (sp) in front. Now works fine. There are
pictures. Interesting! Jim Coffman 
--- "sqpilot@earthlink" <sqpilot@earthlink.net> wrote:

Message
  ----- Original Message ----- 
  From: Ed Anderson 
  To: Rotary motors in aircraft 
  Sent: Wednesday, November 19, 2003 7:16 PM
  Subject: [FlyRotary] Re: Core vs Radistor was Re:
[FlyRotary] radiator


  Boy, you catch me every time{:>)

  Thanks for the info Rusty

   Paul,

      I calculate out Rusty's radiator to have a
volume of 17.5*24.25*2.25 = 964 in^3.  Given that he
was running a turbo, he would naturally want/need
more cooling capacity than a NA block.  So his basic
radiator was approx 50% large in volume than two
cores.  Since he could produce up to that much
additional power with his turbo, it would appear
that his is sized about right - perhaps a bit on the
large size since he probably would not run under
high boost at cruise.  

  MESSAGE CUT TO SAVE DOWNLOAD TIME, ETC

    IBut, in any case, I think your currently
planned radiator size is undersized.  FWIW - always
keepin mind my knowledge of radiators and cooling is
quite limited.


  Ed

  Ed Anderson
  RV-6A N494BW Rotary Powered
  Matthews, NC
  eanderson@carolina.rr.com
    Your knowledge of radiators and cooling may be
limited....however, my knowledge of radiators and
cooling could be written on the head of a match.
Thanks for your valuable input, Ed.  I was trying to
come up with a radiator that could be placed
directly in front of the NACA duct, as Al Wick did. 
I will probably go with a larger radiator, EWP and
fan.   Thanks again.  Paul Conner



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