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SCI & TECH● LOW1h ago · Nov 2, 2026, 4:39 AM

The SR-71 Blackbird, which reached Mach 3, was slow compared to this: NASA had an X-43A hypersonic scramjet engine powered by gaseous hydrogen, capable of reaching Mach 9.6, which was canceled

Clarín · north america

El prototipo experimental registró su marca en noviembre de 2004, cuando mantuvo una velocidad de Mach 9,68 durante 12 segundos, a unos 10.800 kilómetros por hora.La agencia espacial estadounidense abandonó el programa ese mismo año para priorizar el regreso tripulado a la Luna.

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