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3 of these wires anchored to one spot, and constant pull upward
would prevent the rope from bending down, and would save
The structure relies only on tensility and would collapse without
being continuously pulled up. But still, only a tiny rocket is then
needed to send the last
stage into space.
Next rockets reach the wire top independently, and reuse it.
mentioned in my anno [notexactly, Feb 26 2017]
My idea's better. See anno
notexactly's Launch Loop link explained in a video [pashute, Jan 25 2018]
If the wire was wrapped around a helium-filled tube to make it weightless, it wouldn't need the planes. [+]
||If the wire was instead a looped iron pipe of diameter ~50
mm and length ~4 Mm, half of which was covered by
another slightly wider non-ferrous pipe, that half of which
was arched up to ~80 km above ground, and the other half
of which was at ground level, and the entirety of which was
pushed along at ~14 km/s by a station at each end, it
wouldn't need the planes. It also wouldn't need the rocket
until apogee (for circularization/perigee raising). [link]
||This idea is better than a launch loop, since it uses tension
only, and no length structure. So until some height you would
be using much cheaper airlift technology (or even LTA) and
once at the top you have a triangular tether to pull you out.