Science: Faster-than-Sound Effects

Many a layman was struck by an odd item of news about the giant new B29. To avoid certain mysterious "supersonic" effects on the propeller tips, the whirling of its 16-foot-long propellers had to be geared down to one-third of the speed of revolution of the plane's engines.

Whether or not they could explain it, the phenomenon itself was an old story to airmen. They have known for some time that mankind has caught up with the speed of sound and is being catapulted by the airplane into a weird, high-speed unknown which plays some...

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