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Old 10-29-2005, 11:44 AM
Hogweed's Avatar
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"We've always done it that way"

Does the expression, "We've always done it that way" ring any bells?
The US standard railroad gauge (distance between the rails) is 4 feet 8.5 inches. That is an exceedingly odd number.

Why was that gauge used?
Because that's the way they built them in England, and English expatriates built the US Railroads.

Why did the English build them like that?
Because the first rail lines were built by the same people who built the pre-railroad tramways, and that's the gauge they used.

Why did "they" use that gauge then?
Because the people who built the tramways used the same jigs and tools that they used for building wagons, which used that wheel spacing.

Okay!

Why did the wagons have that particular odd wheel spacing?
Well, if they tried to use any other spacing, the wagon wheels would break on some of the old, long distance roads in England, because that's the spacing of the wheel ruts.

So who built those old rutted roads?
Imperial Rome built the first long distance roads in Europe (and England) for their legions. The roads have been used ever since. And the ruts in the roads?
Roman war chariots formed the initial ruts, which everyone else had to match for fear of destroying their wagon wheels. Since the chariots were made for Imperial Rome, they were all alike in the matter of wheel spacing. The United States standard railroad gauge of 4 feet, 8.5 inches is derived from the original specifications for an Imperial Roman war chariot. And bureaucracies live forever.

So the next time you are handed a specification and wonder what horse's ass came up with it, you may be exactly right, because the Imperial Roman war chariots were made just wide enough to accommodate the back ends of two war horses. Now the twist to the story...

There's an interesting extension to the story about railroad gauges and horses' behinds.

When we see a Space Shuttle sitting on its launch pad, there are two big booster rockets attached to the sides of the main fuel tank. These are solid rocket boosters, or SRBs. The SRBs are made by Thiokolat their factory at Utah. 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. The railroad line from the factory happens to run through a tunnel in the mountains. The SRBs had to fit through that tunnel. The tunnel is slightly wider than the railroad track, and the railroad track is about as wide as two horses' behinds.

So, a major Space Shuttle design feature of what is arguably the world's most advanced transportation system was determined over two thousand years ago by the width of a horse's ass.

http://www.boreme.com/boreme/funny-top10/top10-monthly-2005-OCT.php
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Old 10-29-2005, 11:56 AM
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I knew an episcopal priest who ran afoul his vestry. They were adamantly opposed to a change in something or other, a change which he favored. In the course of discussion he said something that has stuck with me, "The last 8 words of Jesus Christ were NOT, 'But we never did it that way before!'"

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Old 10-29-2005, 12:04 PM
Moneypit SEL's Avatar
Now what?
 
Join Date: Jun 2005
Location: SE PA
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Quote:
Originally Posted by Hogweed
[...]When we see a Space Shuttle sitting on its launch pad, there are two big booster rockets attached to the sides of the main fuel tank. These are solid rocket boosters, or SRBs. The SRBs are made by Thiokolat their factory at Utah. 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. The railroad line from the factory happens to run through a tunnel in the mountains. The SRBs had to fit through that tunnel. The tunnel is slightly wider than the railroad track, and the railroad track is about as wide as two horses' behinds.[...]
http://science.ksc.nasa.gov/shuttle/technology/sts-newsref/srb.html

The SRBs are the largest solid- propellant motors ever flown and the first designed for reuse. Each is 149.16 feet long and 12.17 feet in diameter.

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