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Tay Zonday
@tayzonday
How hard would it be to kinetically launch mass to escape velocity without it burning up in the atmosphere? If we built an electromagnetic launch rail atop Mount Everest on 1 kilometer-tall pylons to begin with as thin of an atmosphere as possible, how long would it need to be to hypothetically work? We need cheaper and more sustainable ways to enter space. Would floating a launch rail at, say, 10km altitude with balloons and tethering it with a very long power cable—then floating payload up to it—be more feasible?
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cqb
@cqb
Some rough numbers in here https://youtu.be/gQjbzuOA2mU
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𒂠_𒍣𒅀_𒊑
@m-j-r
I think for crewed it can be something like 3g constant acceleration for 170 miles: https://en.wikipedia.org/wiki/StarTram#Generation_1.5_System_(lower-velocity_option)
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Blinky Stitt
@flashprofits.eth
Last I looked at this, the absurd g forces made the set of viable payloads pretty small.
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Stuart
@olystuart
Here's an interview Fraser Cain did a founder of a company called Electromagnetic Launch about that: https://youtu.be/3uMmVYYMcXU?feature=shared TLDR it's very hard to launch off Earth that way, but more interesting could be launching off the moon or asteroids: https://www.universetoday.com/168193/china-proposes-magnetic-launch-system-for-sending-resources-back-to-earth/amp/
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1frog9
@1frog9
i've always had this idea about launching our trash into the sun
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