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Yep! I still have the two old Harrison cores I cut out
of two Cadillacs out in a junk yard in the mid 1990 flying out front - still
cooling just fine. There is no doubt that the high fin density and the
fact the fins are louvered enhances its transfer of heat to the air. The
thing that always amazed me was the very small cross channels that transfer
fluid between the side tanks. Could not be much larger than 1/8 -
3/16 " dia (if that much), yet seemed to have no problem flowing coolant through
them.
The fact that most are around 3+ inches thick which
corresponds well with the NASCAR racing standard radiator sized for our speeds,
is a fortuitous coincident.
Not to discount their price as well. Mine cost me
between $5 and $25 each out of the junk yard (depended who and which junk yard),
it cost another $25 - $50 to have bungs welded on them, so I have around $75 max
in each. Not too bad.
Ed
----- Original Message -----
Sent: Thursday, November 15, 2007 1:33
PM
Subject: [FlyRotary] Harrison cores
The Harrison built (same as Corvette radiator) used in air conditioning
in full sized GM cars are designed to flow a major amount of air. They are
cheap even when bought new. They transfer heat as good as anything you can
find. They are compact. Two of them can dump the heat from most any rotary
installation. Two of them for coolant and one for oil has been proven in a
number of installations.
If you want less cooling drag build the radiators into the wing skins
like a Supermarine racer.
I raced for years with one Harrison core for oil cooling in front of the
water radiator. A poor installation with heated air going through the water
radiator, but it worked just fine.
Lynn E. Hanover
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