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The Lockheed Martin X-33 was concept for a large Single Stage To Orbit (SSTO) reusable spaceplane designed in the 1990s. It was also a small scale model for the larger Venture Star spaceplane. The space plan would of used a very unique propulsion system to go into orbit. It would of used 2 XRS-2200 linear aerospike engines which would of ran on Liquid Hydrogen and Liquid Oxygen and this same fuel would have been used for the RCS motors. Comparing the X-33 and Venture Star to the Space Shuttle they would have been more easier to turnaround between each flight, would have been cheaper to use and carry more payload into orbit. Other Concepts: Sea Dragon: Twitter: Instagram: LaunchComplex_MC Patreon:
