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NACA Submerged Inlet Low Drag Cooling Air Ducts

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NACA Submerged Inlet Low Drag Cooling Air Ducts

Some comparisons of NACA (National Advisory Committee for Aeronautics,  formed in 1915,  the predecessor to NASA - formed in 1958) ... NACA Submerged Inlet Ducts for Airplanes,  designed to provide maximum smooth air flow into new (1945) buried fuselage Jet Engines (and Later Cooling Air for a multitude of purposes) with Minimum aircraft Drag. 

Both the existing "NACA Ducts" on the CRUZ LSA and also "NACA Ducts" on other airplanes,  Cessna 210,  Mooney M20, Cirrus,  more..  are shown for comparison.

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