Message-ID: <20031120060849.62389.qmail@web12823.mail.yahoo.com>
Date: Wed, 19 Nov 2003 22:08:49 -0800 (PST)
From: james coffman <jimcoffmanus@yahoo.com>
Subject: Re: [FlyRotary] Re: Core vs Radistor was Re: [FlyRotary] radiator
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-2752597@logan.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

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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