Word: speeded
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Dates: during 1930-1939
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...taken a more practical turn. Mathematicians want to separate complex waves and oscillations into simpler movements. Chief use for harmonic analysis is study of the problems presented by the whirls and eddies of air around airplane wings. For example, harmonic analysis makes it possible to measure the varying speed at different points in a wind tunnel, to plot these speeds on a graph and reduce complicated wind motions to a series of simple, understandable oscillations. Thus mathematicians hope to predict how the shape of an airplane wing will affect the motion of the wind. Next practical step would be designing...
...when Air Marshal Sir Edward charged that the Dominion's high proportion of air accidents is due to disobedience of orders or bad flying discipline; that Australia's prized fighting plane, the Wirraways, similar to the U. S. Army's North American BT 9, possesses insufficient speed for a modern fighter and is fit only for a temporary expedient or a training ship: that all Australia's service squadrons are below strength in men and oncers...
According to mathematicians, the length of the day is determined by the speed of the earth's rotation on its axis. Slower speed means a longer day. According to astronomers, speed of the earth's rotation on its axis is affected by the moon. Reason: the moon pulls the tides, and a strong pull creates friction on the earth's surface, slows down its motion. This well-known fact, said Professor Brown, accounts for slight variations in the day's length, but the moon's influence is not powerful enough to cause such large changes...
...astronomical theory no force external to the earth can produce large changes in its rotation on its axis. As for surface changes on the earth. Dr. Brown rules them out. Older theories held that accumulations of ice and snow at the poles might slow up the earth's speed. But the least amount of frozen water necessary to slow up the earth would have changed the average sea level all over the world by about a foot. This has not happened. The weight of mountains and force of volcanoes are also inconsiderable. Even if the whole group of Himalayas...
...tenth annual National Air Races in Cleveland last week end for prizes handsome enough to cover the cost of a racing plane and a decent burial, the speed-mad fringe of U. S. aviation whistled up a great sound and fury. When it was all over, the pockets of Cleveland Promoters Cliff and Phil Henderson were again lined, only one flier had been killed,† and the whinny of ships racing against borrowed time had proved that aviation still has plenty of broncos...