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Doolittle, James Harold

(Encyclopedia)Doolittle, James Harold, 1896–1993, American aviator, b. Alameda, Calif. After serving in World War I as a flier he returned to school and earned a Sc.D. from MIT. He then became noted for his speed...

short takeoff and landing aircraft

(Encyclopedia)short takeoff and landing aircraft (STOL), heavier-than-air craft, capable of rising from and descending to the ground with only a short length of runway, but incapable of doing so vertically. The pre...

vertical takeoff and landing aircraft

(Encyclopedia)vertical takeoff and landing aircraft (VTOL), craft capable of rising and descending vertically from and to the ground, thus requiring no runway. While a balloon or an airship has obvious VTOL capabil...

battleship

(Encyclopedia)battleship, large, armored warship equipped with the heaviest naval guns. The evolution of the battleship, from the ironclad warship of the mid-19th cent., received great impetus from the Civil War. B...

sideband

(Encyclopedia)sideband, any frequency component of a modulated carrier wave other than the frequency of the carrier wave itself, i.e., any frequency added to the carrier as a result of modulation; sidebands carry t...

air, law of the

(Encyclopedia)air, law of the, in the broadest sense, all law connected with the use of the air, including radio and satellite transmissions; more commonly, it refers to laws concerning civil aviation. The developm...

warship

(Encyclopedia)warship, any ship built or armed for naval combat. The forerunners of the modern warship were the men-of-war of the 18th and early 19th cent., such as the ship of the line, frigate, corvette, sloop of...

Newport News

(Encyclopedia)Newport News, independent city (1990 pop. 170,045), SE Va., on the Virginia peninsula, at the mouth of the James River, off Hampton Roads, near Norfolk; inc. 1896. It is a port for transatlantic and i...

modulation, in communications

(Encyclopedia)CE5 Modulation modulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulatin...

navy

(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...