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This will all work out for clippers with perhaps 100 people aboard, but it will be nearly impossible for 2500 people on giant liners of the far future to rapidly transfer to taxis at perigee. Huge liners will carry fueled taxis, just a fraction of the ship's great mass, with them. Travelers will have plenty of time before perigee passage to board taxis and rocket over to space stations in low orbit. Taxis of giant liners might use LANTR for better performance. Travelers will board giant liners at space stations at Earth-Moon L2, sail to Venus or Mars, and take taxis to low orbiting space stations above Venus or Mars while the mother ship slowly spirals in. Taxis will be refueled at low orbit space stations and park inside garage. When leaving planet, travelers will shuttle up to station where liners are docked after their long braking maneuvers and board them again. It will be possible for liners to spiral away from Venus or Mars with sail power because neither planet has VABs, unlike Earth, which adds complication to interplanetary flight to or from Earth. The basic design of large liners will follow that of cycling station below. They will use mag-solar sails and some kind of accessory drive like gas core fission+LH2 when LH2 pipelines from Mars and the ice moons of Jupiter is established. The accessory drive will speed up their escape from planet, but dragging fuel for braking will add too much parasitic mass, so they will rely on sails and taxi system at destination planet. |
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