Word: x
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Dates: during 1950-1959
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...X-1A, 1B and 1D, all built by Bell. These ships are slightly longer than the X-1, and heavier (16,000 lbs.). Their rocket engines deliver 6,000 lbs. of thrust and should push the planes to nearly 1,600 m.p.h...
...symptom of the atomic age, the $4,200,000 Argonne Cancer Research Hospital was opened in Chicago. Built with AEC funds, it will use all kinds of radiation, including giant X-ray machines and radioisotopes such as cobalt-60, to study cancer. Of its eight floors, two are below ground, only two are for patients (56 beds). Every employee must wear a badge that registers exposure to radiation...
...X-1, the first man-carrying plane to exceed the speed of sound (TIME, June 21, 1948). Now in the Smithsonian Institution, the chunky (34½ ft. long, 28 ft. wingspread) ship was built by Bell Aircraft Corp., had a rocket motor with 6,000 lbs. of thrust and was designed to fly more than 1,000 m.p.h...
...world's first man-carrying aircraft designed to take off under its own power and operate at sustained supersonic speeds in level flight." (Other high-speed craft carry fuel for only a few minutes of powered flight.) Built by Douglas Aircraft Co., the twin-jet X-3 is expected to set new speed and altitude records...
...X-4, a light (approx. 7,000 lbs.), transonic plane, built by Northrop Aircraft, Inc. Fitted with two turbojets giving a total of 3,200 lbs. thrust, this sweptwing, almost tailless plane was designed for the study of control problems at altitudes up to 10,000 ft. Its stubby (26 ft. 10 in.) wings are equipped with elevens, i.e., combined ailerons and elevators...