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All that said, NASA and FRC are at about opposite ends of the spectrum in terms of cost of failure vs Cost of Development. If you guess wrong on the shaft material of your FRC robot, at worst case you'll be dead in the water for a couple matches and may be ruled out from reaching your potential at an event. If you guess wrong on your manned trip in space, not only do you likely lose human life, but you may also shut down an entire program or limit future funding.
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Like lets use this O-Ring stuff to seal a solid rocket joint even though experience shows joint rotates in an unpredictable manner under pressure & the O-ring takes a set when it is cold? (Challenger for you young people.
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FEA really didn't exist in today's terms in the 60's. 640 K ram (kilobytes) was a lot back then. Apollo more so than Challenger.