You are missing the point Paul. Maybe >> I << said NACA ducts don't work
for carb air.
If I did I said it for emphasis. The NACA engineers that invented the NACA
duct did
not say that.

Hi, Paul....Please re-read the quote that you submitted from the NACA
engineers. They actually DID say that the "submerged inlets do not appear to
have desireable pressure recovery characteristics for use in supplying air
to oil coolers, radiators or CARBURETORS of conventional reciprocating
engines".  Please see attachment. I wasn't trying to say that YOU said this,
just pointing out that the NACA engineers said it. That is the statement I
have reservations about.
     One need not be an aeronautical engineer to see that the proposed
cooling system you presented would work well. Even with my limited knowlege
of cooling systems, it would appear that it has merit as a successful
cooling system.  I just finished making a couple of your suggested
improvements on my cooling system duct....I will submit in a different post.
Thanks again.  Paul Conner

 
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