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Everyone has heard of a fast plane having its speed described in terms of its Mach number. Mach 2, for example, means twice the speed of sound in air, Mach 3 is three times, and so on. Mach has been ...

__1838: __Ernst Mach is born in the small town of Chirlitz, then part of the Austrian Empire. The scientist would go on to conduct research in many fields, but his most memorable work in aerodynamics ...

We’ve heard blasé dialog about Mach numbers from fighter pilots in movies, but do you know what Mach numbers actually mean? Among other things, it means that two planes going at Mach 1 can actually be ...