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Posted 25 April 2015 - 09:05
Posted 25 April 2015 - 10:34
Working both Imperial and metric in one project isn't unusual for NASA and it's contractors, and conversion issues have cost missions before. In controlling the Mars Climate Orbiter orbital insertion maneuver NASA's ground based trajectory calcs used pound-seconds instead of the orbiters newton-seconds, which didn't end well.
Use 1 or the other, NEVER mix them!
Posted 25 April 2015 - 11:34
Posted 25 April 2015 - 19:36
And this was better as opposed to using manpower and cranes to fabricate this vehicle ... how?
They built two different Saturn variants using traditional methods and it took less than two years from concept to having something on the Launch Pad ready to test. Of course, we remember the flaws with using a pure Oxygen atmosphere, but that was an issue with the spacecraft -- the launcher itself was ready.
Argh. Yet another example of the wrong people being in charge of things. This whole program is fubar, by my reckoning.
Posted 25 April 2015 - 21:29
Posted 25 April 2015 - 22:02
The vertical assembly mode was selected, even though a new high-bay area was required, because horizontal assembly posed problems in maintaining accuracy of joints in the heavy, but thin-walled tanks. In vertical assembly, gravity held the huge parts together, although a 198-metric-ton crane was required to hoist the parts atop each other, and to lower the completed booster back to the horizontal for final finishing.
Posted 25 April 2015 - 22:23
Posted 25 April 2015 - 23:33
Posted 25 April 2015 - 23:37
I was under the impression that this Fabricator/Welder unit was different in every conceivable way from the older models. I stand corrected.
Posted 10 May 2015 - 05:57
From my experience, you can not mix imperial and metric and expect precision. Not everyone is proficient in conversions and ultimately, the longer the supervisory tree, the more likely a mistake. The one I have forged in my head is the "Gimli glider" incident, the 767 which ran out of fuel in the early 80"s. As a side note, the maintenance crew that drove from Winnipeg to carry out repairs, also ran out of fuel.....