The story of horse-cart to spacecraft
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So when horse drawn carriages came, it was natural that the rails follows the same size of gauge because the people who built the tramways used the same jigs and tools that they used for building wagons, which used that wheel spacing.
US Standard railroad gauge (distance
between the rails) is 4 feet, 8 1/2 inches. That's an exceedingly odd number.
Why was that gauge used?
Because
that's the way they built them in England, and the US railroads were built by
English expatriates.
When we see a Space Shuttle sitting on
the launch pad, there are two big booster rockets attached to the sides of the
main fuel tank. These are the solid rocket boosters, or SRBs. The SRBs are made
by Thiokol at a factory in Utah (Y-oo-t-aa). The engineers who designed the
SRBs might have preferred to make them a bit fatter, but the SRBs had to be
shipped by train from the factory to the launch site.
So is it really the Roman who had a hand in the design of Atlantis?
:)