Posted on 01/19/2008 11:03:55 PM PST by anymouse
It would be bad.
"Egon, define 'bad.'"
“Simple! Reverse the polarity.”
Don’t cross the streams.
That would be bad.
I presume they carry the same instructions as a Chinese firecracker pack:
"Light fuse
Get away"
I agree, it certainly sounds like NASA is taking all the right steps. You make a preliminary design, analyze it and improve it. If this is something that should have been anticipated before the original drawings were begun, that's a bad thing but not a disaster.
All in all, it's merely an uncomfortable stumble, but not really anything like a major embarassment.
Pogo problem?
We have met the enemy, and he is us?...
I'm so old I've actually used a slide-rule. (AKA a 'friction calculator')...
They need seals at every pipe juncture, pump, valve, and gimbal.
Because in 1960 NASA was a space program, and in 2008 NASA is a federal affirmative action jobs program that needs to satisfy environmentalists and lawyers.
Yeah, and a gerrymandering issue in that Utah wanted a piece of the space pie before its congress crittiers would vote for funding.
The Space Shuttle and the Horse's Rear End
Say friend, did you know that the 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.
I see, but why did the English build them like that?
Because the first railway lines were built by the same people who built the pre-railroad tramways, and that's the gauge they used.
Well, why did they use that gauge in England?
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 their wagons use that odd wheel spacing?
Because, if they tried to use any other spacing the wagon wheels would break on some of the old, long distance roads. Because that's the spacing of the old wheel ruts.
So who built these old rutted roads?
The first long distance roads in Europe were built by Imperial Rome for the benefit of their legions. The Roman roads have been used ever since.
And the ruts?
The original ruts, which everyone else had to match for fear of destroying their wagons, were first made by the wheels of Roman war chariots. Since the chariots were made for or by Imperial Rome they were all alike in the matter of wheel spacing.
Thus, we have the answer to the original question. The United States standard railroad gauge of 4 feet, 8 1/2 inches derives from the original specification for an Imperial Roman army war chariot.
And the motto of the story is Specifications 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 chariots were made to be just wide enough to accommodate the back-ends of two war-horses.
So, just what does this have to do with the exploration of space?
Well, there's an interesting extension of the story about railroad gauge and horses' behinds. 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. 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 from the factory runs through a tunnel in the mountains. The SRBs had to fit through that tunnel. The tunnel is slightly wider than a railroad track, and the railroad track is about as wide as two horses' behinds.
So a major design feature of what is arguably the world's most advanced transportation system was originally determined by the width of a horse's ass.
Hoax? Riiiiggghhhhhht.
Well it occurs to me the added danger from solid rocket boosters isn’t the seals themselves but that they have superheated gas flowing past them instead of cool liquid. If I understand it, liquid fuel isn’t ignited until after it is pumped to the reaction chamber.
Too many of NASA's resources have been diverted to "Global Warming" and other issues that are not remotely related to their original mission.
Important safety tip.
The Challenger died because the seals were too cold.
It was so cold on the launch pad that the rubber was too hard to make a good seal.
That is why EVERY ENGINEER involved wanted to suspend the launch until it was warmer.
MANAGMENT wanted the shuttle to be triumphantly in orbit when Reagan gave his State of the Union address.
MANAGMENT bullied the staff into being reasonable, and doing it THEIR WAY (or else!).
The rest is, as they say, History...
“Liquid fuel doen’t pack the punch of solid fuel, and it’s harder to store. “
Interesting - I had always assumed that LOX + Hydrogen was about the most powerful fuel you could use. Is that offset by the added tanks, pipes, pumps, engines, etc?
Of course, it is a lot easier to turn off or adjust the thrust on a liquid fueled engine - I guess that is important.
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