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The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915, to undertake, promote, and institutionalize aeronautical research. On October 1, 1958, the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA). NACA was pronounced as individual letters, rather than as an acronym〔Murray, Charles, and Catherine Bly Cox. ''Apollo''. South Mountain Books, 2004, p. xiii.〕 (and after NASA first came into being, it too was vocalized as individual letters as well).〔(Creation of NASA: Message to Employees of NACA from T. Keith Glennan (1958 NASA film) )〕 Among other advancements, NACA research and development produced the NACA duct, a type of air intake used in modern automotive applications, the NACA cowling, and several series of NACA airfoils which are still used in aircraft manufacturing. During World War II, NACA was described as "The Force Behind Our Air Supremacy" due to its key role in producing working superchargers for high altitude bombers, and for producing the cutting edge wing profiles for the North American P-51 Mustang.〔https://www.nasa.gov/centers/langley/news/factsheets/WWII.html〕 NACA was also key in developing the area rule that is used on all modern supersonic aircraft, and was responsible for the key compressibility research that allowed the Bell X-1 to break the sound barrier. ==Origins== NACA began as an emergency measure during World War I to promote industry/academic/government coordination on war-related projects. It was modeled on similar national agencies found in Europe. Such agencies were the French ''L’Etablissement Central de l’Aérostation Militaire'' in Meudon (now ''Office National d'Etudes et de Recherches Aerospatiales''), the German Aerodynamic Laboratory of the University of Göttingen, and the Russian Aerodynamic Institute of Koutchino with a Soviet successor agency, the "Central Aerohydrodynamic Institute", still known in post-Soviet Russia as TsAGI today, in 1918. However, the most influential agency upon which the NACA was based was the British Advisory Committee for Aeronautics. In December 1912, President William Howard Taft had appointed a National Aerodynamical Laboratory Commission chaired by Robert S. Woodward, president of the Carnegie Institution of Washington. Legislation was introduced in both houses of Congress early in January 1913 to approve the commission, but when it came to a vote, the legislation was defeated. Charles D. Walcott – secretary of the Smithsonian Institution from 1907 to 1927 – took up the effort, and in January 1915, Senator Benjamin R. Tillman, and Representative Ernest W. Roberts introduced identical resolutions recommending the creation of an advisory committee as outlined by Walcott. The purpose of the committee was "to supervise and direct the scientific study of the problems of flight with a view to their practical solution, and to determine the problems which should be experimentally attacked and to discuss their solution and their application to practical questions." Assistant Secretary of the Navy Franklin D. Roosevelt wrote that he "heartily () the principle" on which the legislation was based. Walcott then suggested the tactic of adding the resolution to the Naval Appropriations Bill. According to one source, "The enabling legislation for the NACA slipped through almost unnoticed as a rider attached to the Naval Appropriation Bill, on 3 March 1915."〔(【引用サイトリンク】title=Orders of Magnitude, Chapter 1 )〕 The committee of 12 people, all unpaid, were allocated a budget of $5,000 per year. President Woodrow Wilson signed it into law the same day, thus formally creating the Advisory Committee for Aeronautics, as it was called in the legislation, on the last day of the 63rd Congress. The act of Congress creating NACA, approved March 3, 1915, reads, "...It shall be the duty of the advisory committee for aeronautics to supervise and direct the scientific study of the problems of flight with a view to their practical solution...." 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National Advisory Committee for Aeronautics」の詳細全文を読む スポンサード リンク
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