Safety in crowds, trust in transactions, relative cleanliness of rooms & food handling standards - there are so many things we take for granted in a civil society.
Humans being willing to work, travel, shop, & eat in close physical proximity with other humans is the 'Jesus nut' of the world economy....https://twitter.com/qikipedia/status/1236079111941918720 …
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I would leave out safety in crowds for now
End of conversation
New conversation -
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Cool fact the drive shaft and rotors are(or were) mated with an interference fit meaning the rotor 'ring' is smaller than the shaft(it fits over). To achieve this mating the rotor 'ring' is heated such that it expands slightly. When it cools the metal actually screams.
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Reminds me of something Bush said after 9/11...
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True though!. As long as the blades still rotate you have an even chance.
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I.e. the 'Jesus Nuts'.
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