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air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

radio

(Encyclopedia)CE5 A. AM transmitter B. AM receiver radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially...

Fokker, Anthony

(Encyclopedia)Fokker, Anthony fôkˈər [key], 1890–1939, Dutch-American aircraft manufacturer, b. Kediri, Java, as Anton Herman Gerard Fokker. He established aircraft factories in Germany before World War I and ...

Lockheed, Allan Haines

(Encyclopedia)Lockheed, Allan Haines, 1889–1969, American aviation pioneer, b. Niles, Calif., as Allan Loughead. He worked as a mechanic and a race car driver, then, following his first flight (1910), he became a...

Northrop, John Knudson

(Encyclopedia)Northrop, John Knudson, 1895–1981, American aviation pioneer, inventor, and executive, b. Newark, N.J. He worked for the Loughead Aircraft Manufacturing Co. (1916–20) as a draftsman, designing sea...

Tupolev, Andrei Nikolayevich

(Encyclopedia)Tupolev, Andrei Nikolayevich əndrāˈ nyĭkəlīˈəvĭch to͞opōˈlĕf [key], 1888–1972, Soviet aeronautical engineer, educated at the Moscow Technical Institute. In 1918 he helped organize the C...

Carroll, James

(Encyclopedia)Carroll, James, 1854–1907, American bacteriologist and army surgeon, b. Woolwich, England, M.D. Univ. of Maryland, 1891. He went to Canada at 15 and later joined the U.S. army. A member of the Yello...

superphosphate

(Encyclopedia)superphosphate or superphosphate of lime, Ca(H2PO4)2, is a compound produced by treating rock phosphate with sulfuric acid or phosphoric acid, or a mixture of the two. It is the principal carrier of p...

Hall effect

(Encyclopedia)Hall effect, experiment that shows the sign of the charge carriers in a conductor. In 1879 E. H. Hall discovered that when he placed a metal strip carrying a current in a magnetic field, a voltage dif...

Torrance

(Encyclopedia)Torrance, industrial and residential city (1990 pop. 133,107), Los Angeles co., SW Calif.; inc. 1921. It has large aircraft and electronics industries. Among its many manufactures are aircraft, electr...