On Oct 24, 2012, at 10:14 AM, Kenneth Johnson <kjohnsondds@yahoo.com> wrote:

> A more efficient design would  have intake air entering the bottom anterior of the the cowl and to pass through the radiator.   As this air is heated by the radiator it rises and should exit the top sides of the cowl.  No one has done that because of the risk of engine oil on the windshield.


I haven't read Paul's book but if this is an example of his suggestions, I wouldn't have much confidence in it.  

Two basic rules of thumb for A/C cooling systems are:

1. Turning high speed air is hard to do and loss prone energy wise.

2.   The pressure represented by convection of rising hot air is not significant  and can safely be ignored for our purposes.  

Tracy