Anderson Ed wrote:

Not into heat transfer thermodynamics sufficient to bring any technical
argument to the "thin" vs "thick".  However, I do know that on aircraft
oil coolers they are thick not thin.  Now just because they are done
that way on aircraft does not prove anything, but an assumption could be
made that the Heat exhanger builders may have done studies indicating
that thicker was better. My impression of the argument is that thin
radiators would be better at slow airspeeds and thick radiators better
cooling at high airspeeds.

 I can tell you that I read the "thin" theory and tried it myself with
two 12x8x2.25 radiators in the same position.  I never flew with it
because it would not keep things cool at modest power settings during
static run up. However, I was using -12 hoses vice -16 hoses with the
thin radiators, so that may have made a difference. Swapped them back
out. Could have been some problem with my installation, but the thicker
worked so I put them back in.

Ed Anderson

The idea is comparing constant volume. If the thin ones were smaller
volume then it is not a direct comparison and all other things are
not equal.

PL
 
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