NASA's about to fly its powerful X-plane. It could make history.
After the first test flights in 2025, Lockheed Martin will transfer the plane to NASA. Then, after acoustic testing over ...
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Discover the 10 fastest jets in the world
Powered by two jet engines, it boasts a top speed of Mach 2.34 ... is expected to debut in 2025. NASA's X-43, an experimental scramjet that achieved an unprecedented speed of Mach 9.6, or 11,854 ...