via: SIERRA HOTEL AERONAUTICS
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February 19th 1916 – Ernst Mach passed away; Austrian physicist and philosopher, noted for his contributions to physics, including the Mach number and the study of supersonic shock waves.

"There was a demon that lived in the air. They said whoever challenged him would die. Their controls would freeze up, their planes would buffet wildly, and they would disintegrate. The demon lived at Mach 1 on the meter, 750 miles an hour, where the air could no longer move out of the way. He lived behind a barrier through which they said no man could ever pass. They called it: The sound barrier."

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via: SIERRA HOTEL AERONAUTICS · February 19th 1916 – Ernst Mach passed away; Austrian physicist and philosopher, noted for his contributions to physics, including the Mach number and the study of supersonic shock waves. "There was a demon that lived in the air. They said whoever challenged him would die. Their controls would freeze up, their planes would buffet wildly, and they would disintegrate. The demon lived at Mach 1 on the meter, 750 miles an hour, where the air could no longer move out of the way. He lived behind a barrier through which they said no man could ever pass. They called it: The sound barrier." www.Sierrahotel.net Image: JO2 (SW) David Valdez
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