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Comment by troymc

You can build something like this, but much bigger, and with no external casing, on the Moon or anywhere with little or no atmosphere.

Professor James Longuski and his students at Purdue University have done quite a bit of research on this idea over the years. They call it a tether sling. To keep the tip acceleration (v^2)/r low, you want a large r. Some papers:

https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=long...

Note 1: Professor Longuski was my PhD advisor, but I never did any research on tether slings myself.

Note 2: Others have also researched tether slings. The papers linked above give many citations to related research.

parent troymc 5 years ago

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