Howard wrote:

The wing root radiator looks great.....  Far enough back that it probably
has very little effect on lift.... neat efficient setup..... those radiators
look expensive.

I've often wondered about radiators that actually used the surface of the
wing as heat exchanger surface..... never could figure out a bullet proof
way of doing it though.

                       H.W.

It was used in WW I. A rad was mounted horizontally in the center of the top
bi plane wing. Cooled great but loss of lift and increase in drag
led to its demise.

Paul Lamar

Bill Freeman wrote:

Some early racing planes had copper skins on the wings with tubes
embedded.  I assume that the fragility made them impractical.  Lots
of changes to puncture your paper thin copper sheet/tube.  Must have
worked at least well enough to win races since the planes are in
the Smithsonian.

Bill

The leading edges of early P38's were used as intercoolers. They proved inadequate
and were replaced by a conventional intercoolers.

Paul Lamar
 
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