Word: speeding
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Dates: during 1950-1959
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Transport: The Soviets are producing a large twin-rotor helicopter called "The Horse," which can lift 40 soldiers or 10,000 Ibs. at a speed of 110 m.p.h. Ready for production is the gas-turbine MI-6 ("The Hook"), which will carry twice the load of The Horse. U.S. Army experts say they have nothing to match either of these Soviet choppers...
Load into Speed. Liquid-fuel rockets burn their fuel only as fast as their pumps, which must be kept light, can deliver it to the combustion chamber. This limitation keeps the thrust comparatively low, and low thrust means a long burning time. Thus, a heavy load of fuel is carried to high altitude against the pull of gravitation before it is burned and its energy turned into speed...
Solid-fuel rockets avoid most of this waste of energy by burning their fuel very fast-in a few seconds, if desirable. Instead of struggling painfully off the ground as liquid-fuel rockets do, the solid-fuel bird can be gone in a flash. Its higher speed while still in the dense lower atmosphere costs something in aerodynamic drag, but since solid-fuel rockets have no pumps, valves or plumbing, they are more compact and can slip through the air more easily...
Control by Blow-Off. To hit a distant target accurately, a long-range ballistic missile must be steered in the right direction and must attain the right speed. If it is traveling 23,000 ft. per sec. (15,600 m.p.h.), an error of I ft. per sec. in its top speed will make it miss its target by 500 yds. So when the desired speed has been reached, the thrust must be cut off accurately in a small fraction of a second. This is not too difficult with liquid-fuel rockets, whose thrust can be cut by shutting...
Lockheed JetStar, the first U.S.-built light jet transport. Cruising speed: 500 m.p.h. with ten passengers. Price: around...