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NASA's X-43A Achieves Mach 9.6, Validates Hypersonic Flight

10/16/2025

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Summary

Story summary

In 2004, NASA's X-43A, part of the Hyper-X initiative to validate scramjet technology, reached speeds of ten times the speed of sound.
The X-43A was an unpiloted aircraft launched from a B-52B bomber.
It reached Mach 9.6 at an altitude of 110,000 feet during its second test.
The success demonstrated the feasibility of air-breathing hypersonic flight.

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Story summary

In 2004, NASA's X-43A, part of the Hyper-X initiative to validate scramjet technology, reached speeds of ten times the speed of sound.
The X-43A was an unpiloted aircraft launched from a B-52B bomber.
It reached Mach 9.6 at an altitude of 110,000 feet during its second test.
The success demonstrated the feasibility of air-breathing hypersonic flight.