Aeronautics: Plane v. Sound

Suppose it were possible to fire a blank cartridge so big and loud it could be heard across the U. S. Suppose such a cartridge were fired in New York as starting signal for a Westbound airplane. Three hours and 20 min. later the noise of the explosion would echo up San Francisco's Market Street and just 76 minutes after that the airplane would swish down upon San Francisco Bay, at a landing speed of 103 m. p. h. It would, that is. if Engineer John Stack knows how to use a wind...

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