Word: thats
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Dates: during 1940-1949
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To escape into outer space, Lewis pointed out, requires an initial speed of 6.95 miles a second (25,020 m.p.h.). This requirement cannot be dodged by running the rocket motor slowly over a long period; that would only waste energy by forcing the ship to carry heavy fuel to a...
While hearing this piece of optimism, the A.S.M.E. also honored, as the year's best technical paper by an undergraduate, a piece of rocket-pessimism by George D. Lewis of the University of Connecticut. Engineer Lewis, who now works for Pratt & Whitney Aircraft Co., argued mathematically that a single...
To reach "escape velocity," the space ship's fuel must be used as economically as possible, and the efficiency of a rocket motor depends on the speed of the exhaust gases. Lewis calculated that a space ship carrying half its total weight in fuel would have to shoot out...
Experts called it the biggest atomic news since the end of World War II. The Atomic Energy Commission revealed last week that it is now considered practical to build a nuclear reactor which will "breed" more atomic fuel than it consumes.
No Ashes. The AEC does not claim immediate 100% efficiency. The accumulation of radioactive fission products as impurities in the uranium, for instance, will certainly cause trouble long before the action is complete. But the contaminated uranium could be purified and "recycled." The AEC did not say so, but there...