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19 October 2017

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JJackson

I don't see a problem in anchoring into rock but the tensile strength of the tether is not the only problem. Having seen the damage accrued, on solar panels on our existing satellites, it would also need the bulk to sustain damage. The low lunar gravity means the lunar GEO is at 55,000km and the counter mass must be beyond this and a function of mass*distance which makes the tether very long unless you add a propulsion system (presumably solar powered) at the end of the tether to add tension. If the tether could be made of polymer that could be 'painted on' in place then the cargo carrier could include a repair mechanism to resurface/repair micro meteorite damage as it goes.

JJackson

An after thought.
What we need is a giant space spider. This would be taken out to the Lagrange Point. It would need two spinnerets one facing the moon and the other earth. The spinnerets would extrude the the two tethers and the two bodies gravities would extend the threads in opposite direction. The rate of extrusion could be balanced to maintain station. Now all we need is one of the sites chemists to come up with a ways to spin a carbon fibre hawser from binary liquids which can be shuttled up from earth as required.

Martin Oline

Well, it looked good on the drawing board. The Navy is scrapping it's $500mn rail gun. Link from RT which contains a link to Popular Mechanics:

https://www.rt.com/usa/412055-railgun-navy-hvp-funds/

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