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X-15: NASA Somehow Built A Mach 6.7 Hypersonic Aircraft
an aircraft capable of flying to space, as opposed to NASA's preference for a capsule. -The X-15, powered by the Reaction Motors XLR99 engine, set records for speed (Mach 6.7) and altitude (67 ...
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Lockheed X-24C: The Hypersonic Mach 8 Plane Explained in 3 Words
What You Need to Know: The Lockheed L-301, also known as the X-24C, was an ambitious experimental hypersonic aircraft project in the 1970s that aimed to build upon the advancements of the X-15 and ...