From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: Cooling Model Enhancement
To: flyrotary
Date: Tue, 21 Oct 2003 08:03:23 -0400
Message-ID: <web-2644977@logan.com>
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Posted for "Ed Anderson" <eanderson@carolina.rr.com>:

Chad, those are calculated numbers.  I think I found the problem with my use
of the model.
and yes, the basic formular I use for heat transfer is the one you cite in
your message.  What I was trying to find out was if I knew the mass flow and
the BTU requiring rejection into that mass flow, could I determine the
expected delta T.

As you say this is a complex phenomona and my simple model may just be too
simple
I am working on trying to factor in such things as the "thickenss" effect
both on delta T and air flow, etc.


Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

>>>Ed, are these calculated or measured numbers? If calculated, what's the
formula being used?
> Here is what the temp rise model gives (all temps in farenheit):
>
> OAT  Delta T   Exit Radiator
>
> 0            34.9        34.9
>
> 30            35.59    65.59
>
> 60        36.15        96.15
>
> 90        36.02        126.02
>
> 120        37.48        157.48