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NACA experience provided a model for World War II research, the postwar government laboratories, and NACA's successor, the National Aeronautics and Space Administration (NASA). NACA also participated in development of the first aircraft to fly to the "edge of space", North American's X-15. NACA airfoils are still used on modern aircraft.
Prior submerged inlet experiments showed poor pressure recovery due to the slow-moving boundary layer entering the inlet. The NACA design is believed to work because the combination of the gentle ramp angle and the curvature profile of the walls creates counter-rotating vortices which deflect the boundary layer away from the inlet and draws in the faster moving air, while avoiding the form ...
For example, the NACA 2412 airfoil has a maximum camber of 2% located 40% (0.4 chords) from the leading edge with a maximum thickness of 12% of the chord. The NACA 0015 airfoil is symmetrical, the 00 indicating that it has no camber. The 15 indicates that the airfoil has a 15% thickness to chord length ratio: it is 15% as thick as it is long.
The NACA site at Moffett Federal Airfield becomes the Ames Aeronautical Laboratory, in honor of Dr. Joseph Ames, charter member of the NACA and its longtime chairman. Key personnel for the new laboratory came from Langley, and the junior lab tended to defer to Langley for some time.
Aviation in the United States was not regulated during the early 20th century. A succession of accidents during the pre-war exhibition era (1910–16) and barnstorming decade of the 1920s gave way to early forms of federal regulation intended to instill public confidence in the safety of air transportation. [7]
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California allows a person with a claim to assets in the estate of someone who has died to collect them without going through formal probate by using an affidavit for collection of personal ...
A different area rule, known as the supersonic area rule, developed by NACA aerodynamicist Robert Jones in "Theory of wing-body drag at supersonic speeds", [2] is applicable at speeds beyond transonic, and in this case, the cross-sectional area requirement is established with relation to the angle of the Mach cone for the design speed.