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Word: dynamicist (lookup in dictionary) (lookup stats)
Dates: during 1950-1950
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Usage:

Wasp Waists. Searching for a prop that could be used efficiently above 450 m.p.h., Hamilton's engineers, led by Chief Aero-dynamicist George Rosen, tried all sorts of shapes. One design, intended to sidestep shock waves, had curved blades, quite like the swept-back wings of a fast modern fighter. Another had a blade with a pinched-in "waist." Some blades were short and broad so that they could spin rapidly without nearing sonic speed. All these designs proved unsatisfactory...

Author: /time Magazine | Title: Science: Return of the Prop | 5/15/1950 | See Source »

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