There is a helicopter in San Francisco grabbing things from the top of a skyscraper and lowering them down?pic.twitter.com/qFf6tc0LCY
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been wondering about this since i was a kid! Thanks.
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Just went on a Synchropter tour. What a cool machine.
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IIRC Germans tried designing synchronisation mechanisms, French just attached metal deflectors to the propeller blades
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That whole page is fascinating – so many approaches.
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