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Science Inventions and Discoveries
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What is the name of the sub-scale version of the Venturestar?
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A
X-33
💡 Explanation:
The Lockheed Martin X-33 was an unmanned, sub-scale technology demonstrator for the VentureStar, a proposed reusable launch vehicle. The project was intended to test the 'single-stage-to-orbit' concept before being canceled in 2001.