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REFLECTOR: NACA air scoop design


Do you (or anyone else on Reflector) have a reference for design info for
NACA scoops?

Also, how do you know if the area on the fuselage where you want to put the
NACA inlet is a good "high pressure" point?  The factory inlet for the nose
cooler seems to be a good place (surface is diverging); but, it also has a
lot of direct frontal area (ram air), so maybe that's why it works.  The
converging aft area of the fuselage (approaching the cowl) appears not good
for a NACA inlet; maybe that's why the armpits (ram air) are used.

Is the bottom of the fuselage better that the top for a NACA scoop? 

Pete Beaty.