Key Points and Summary - Decades before the rumored SR-72 "Darkstar," America had already conquered hypersonic flight with the X-15 rocket plane. -In 1967, this remarkable experimental aircraft, ...
Key Points and Summary - The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic regime. -Air-launched from a B-52, three X-15s flew ...
Scientists at the forefront of hypersonic weapons research in China say they have a more powerful revolutionary air-breathing engine. The “revolutionary” air-breathing engine could lift an aircraft ...
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