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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.
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.
Drag and lift coefficients for the NACA 63 3 618 airfoil. Full curves are lift, dashed drag; red curves have R e = 3·10 6, blue 9·10 6. Coefficients of lift and drag against angle of attack. Curve showing induced drag, parasitic drag and total drag as a function of airspeed. Drag curve for the NACA 63 3 618 airfoil, colour-coded as opposite plot.
In January 1945, Jones developed a theory of the delta wing based on thin-airfoil theory. Others at Langley were sceptical until supersonic testing of models was done by Robert Gilruth and in April by Theodore von Karman. Jones's theory was not truly accepted until that summer when Von Karman's team of investigators found that German experts ...
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The airfoil is a NACA laminar flow type of varying section over the span, starting at the wing root as a NACA 64(3)-618, becoming a NACA 64(3)-615 by mid-span and then a NACA 4412 at the tip. The wing is constructed from plywood and fiberglass and is responsible for the Annebula's performance increase from the Cherokee II's 23:1 glide ratio to ...
The cowling consists of a symmetric, circular airfoil that is wrapped around the engine. In a normal planar airfoil, like a wing, the difference in airspeeds, and their associated changes in pressure, on the top and bottom surfaces, enhances lift. In the case of the NACA cowl, the ring-shaped airfoil is positioned so this lift effect is forward.
Data from Jane's All The World's Aircraft 1982–83 General characteristics Crew: 1 or 2 pilots Capacity: 8–10 passengers Length: 39 ft 0 in (11.89 m) Wingspan: 49 ft 4 in (15.04 m) Height: 13 ft 2 in (4.01 m) Wing area: 253.6 sq ft (23.56 m 2) Aspect ratio: 9.6:1 Airfoil: NACA 23018 at root, NACA 23019 at tip Empty weight: 5,682 lb (2,577 kg) Gross weight: 9,850 lb (4,468 kg) Powerplant: 2 ...