Why do superfast trains (maglev) have extra long noses even though the already look like airplanes (i.e. long tubes)?
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A really simple way to understand it is to compare Mach 1 (the speed of sound) at ground level where trains are to Mach 1 up in the atmosphere where planes fly.
– At sea/ground level, Mach 1 is 343 m/s
– At 35,000 feet, Mach 1 is 295 m/s
The air is thinner up high and it affects how aerodynamic you have to be.
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