Word: gyros
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...Gyro-frequency: the gyration frequency of an electron in the earth's magnetic field...
Laboratory tests with discharge tubes containing air at low pressures, said Dr. Bailey, show that radio waves of gyro-frequency* would produce a strong glow in the ionosphere (electrified radio mirror) 60 or 70 miles up. The artificial display would be the same in fundamental principle (emission of light by electrically excited atoms) as natural auroras, or as the glow caused in neon lights by electric currents. The scientist pointed out that existing super-power installations, such as Cincinnati's 500-kilowatt WLW (see p. 66) or the Moscow station of equal power, were strong enough to induce glow...
...swift, silver Lockheed monoplane that Hughes had whipped off Floyd Bennett Field for Paris a little over four days earlier, was the most foolproof private plane that ever flew. It had two radio compasses, three radio transmitters (see p. 50), three receivers. It had a Sperry gyro-pilot, a new type drift indicator, robot navigational control. It had a crew of four men trained in the use of all these instruments...
...Stoddart. Flier Hughes was guided by the most reassuring set of flying gadgets ever packed into a private airplane. Kept on his course by a homing radio compass, another taking bearings from ships at sea, and a new periscopic drift indicator perfected by Lieutenant Thurlow, Flier Hughes let a gyro-pilot do most of the flying, chatted every half hour or so over a powerful radio transmitter to a base at the New York World's Fair that was using a towering trylon of that future exhibition for an antenna...
...aboard the Warship Delaware. The Delaware's chief electrician, a stocky, 24-year-old farm boy from North Carolina named Thomas Alfred Morgan, was of great help in installing the mechanism. Next year Inventor Sperry lured Tom Morgan away from the Navy to install other gyro-compasses for the new Sperry Co. Serious, hard-working Tom Morgan applied himself with such vigor that by 1922 he was vice president, had contributed immeasurably to Sperry's rise to dominance in the field of nautical and aeronautical instruments. In 1928 when the company was bought by North American Aviation...