Message-ID: <3FD262E4.3010204@nc.rr.com>
Date: Sat, 06 Dec 2003 18:14:44 -0500
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: spray bars
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Bill Eslick wrote:
>  FWIW...........  I installed a "mister" nozzle ahead of one of my 
> evaporator cores.  I have temperature sensors (cht probes) at the exit 
> of each radiator, so I can read differences in delta T between the two.
>  
> I used a 30 psi pump from a motor home water system.  On the hottest of 
> days (all summer in Texas), the most benefit I ever saw was 1 to 2 
> degrees.  I'm sure this could be improved with more nozzles, better 
> placement, etc., but I had much more success with modifying the cowl flap.
>  
> Bill Eslick

Can you estimate how much water you were pumping into the plenum? From 
Ed's earlier postings on the amount of thermal energy needed to vaporize 
   a set amount of water, I would say the success or failure of a mister 
would depend on how much water it pumped.  The volume of water is what 
removes the heat, the misting only makes it more efficient.

When you say, "the exit of each radiator", is that measuring the cooling 
temp or the exit air?  I'm assuming the former, but I'm not sure.

-- 
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
   alleviated by information and experience."
                                   Veeduber