From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: weird cooling ideas, part 2 
To: flyrotary
Date: Wed, 19 Mar 2003 09:36:05 -0500
Message-ID: <web-2072109@logan.com>
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Posted for "Ed Anderson" <eanderson@carolina.rr.com>:


Well, Ok, Rusty,  as long as you just messing with my head.  Regarding Temp
drops across a radiator, as I am sure you know, this factor can be a very
misrepsentive indication of how effective a cooling system is.  I can easily
get a 100 deg drop across my evaporator core.  Generally, the slower your
coolant flow through your radiator the more temperature drop you get, its
just too bad that slow coolant flow does an inadequate job of removing heat
from the engine.  That is one of the sources for the old myth that slower
flowing cooling does a better job.  People just measured the temp drop
across their radiator and noticed that the slower the coolant flow the
greater the temperature difference and erronous concluded that slow coolant
was best.  Of course, slow coolant flow does not remove heat from the engine
as well as a faster coolant flow.  So, like always, its a trade off between
two parameters.

So lets see the spects of that custom radiator.  I suspect that should I
ever go to turbo boost that my coolant system may need an upgrade.

Flying Friday, if the weather man is correct.  Been rainning here for almost
two weeks now.

Ed Anderson


> In the mean time, since you like math so much, I'll let you explain how my
> flat radiator managed half the temp drop of one of your evap cores, with
> only 4.6% of the area.  BTW, since I'm counting both sides of my flat
> radiator, I'm counting both sides of your fins :-)