Kevin Klepies wrote:

Dear Paul
     The double cross flow rad you are talking about i had the honor of 
repairing a top tank tear out area  on.  The hot water
went to the front core first then doubled back into the back core  
and came out the top of the back core a very compact design
which i think should be looked at for aircraft use. If anyone is 
interested I'm game to build one.

Regards

Ed

techwelding@comcast.net

Should be plumbed the other way around hot in the back cold out of the front.
The air warms up as it passes the front core keeping a more or less
constant temp difference between cooling air and the core (liquid).

This was discovered by Franklin for their air cooled engines used in cars in 
the early thirties. Later the engines where used in aircraft.

BTW Ed can you bend thin wall (.040) 6061 tubing 1.5 inch OD?


Paul Lamar
 
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