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A weight being swung around on the end of a rope is the basis of the space elevator, The space elevator is based on the idea of swinging a weight around in a circle on the end of a tether. In the case of the space elevator, the 24 hour rotation of Earth does the spinning of the counterweight attached by the tether; the tether becomes a structure which can support transportation along itself.
A siphon uses the lower gravitational potential of one end of something so as to lift from a slightly higher gravitational potential at one end up even higher before then lowering to below the ortiginal gravitational potential. Up and over the side of an aquarium to empty the tank, once flow is started, for example. The structure providing teh continuity between the two ends is the siphon and its structure of course also goes higher before going to its lower end. The Mooncable project basic concept was similar in that it started out a gravitational potential of the surface of the Moon, went higher through L-1 of the earth-moon system, and then to a lower grvitational potential within teh gravitational field of the earth, a bit deeper than the gravitational potential at the surface of the moon, so as to provide an excess pull toward the earth thus supporting the structure attached to the lunar surface and stretching out toward the earth. Movement of material, analogous to the movement of water over the top of an aquarium to empt it, theoretically cold be done by coupling through electromagnetic energy transference along conductors; if a sufficiently strong tether material were available in quantity, the tether could be in the form of a band circulating between two pulleys, one at the lunar surface and the other at the far end dangling partway down toward the Earth, and payload cold be attached to theis circulating band between the two pulleys, to move meaterials up from the lunar surface to its far end.
Copyright © 2008 James E. D. Cline. Permission granted to reproduce providing inclusion of a link back to this site and acknowledgment of the author and concept designer James E. D. Cline.