![]() ![]() ![]() Please note that this list only include SSTO (Single Stage to Orbit) or to sub-orbit to qualify. Both of these are obviated by the Sci Fi favourite propulsions of fusion torches, antimatter annihilators, reactionless drives and what have you. Another issue is the ability to get to Mach 25, but that's not too hard. The obvious technical issue is that you need a store of liquid oxygen on board for the actual space bit of the journey - as you need something to burn the hydrogen with once the air gets too thin. Saves you the cost of a space launcher that you only use once. Many ships have Vertical Take Off Or Landing (VTOL) capabilities these babies, though, can use a regular runway too. In essence, a spaceship that can take off and land like an aircraft, as well as also looking like an aircraft. ![]()
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