SUPER FAST Mach 6 SR 72 aircraft to be built for US Air force

SUPER FAST Mach 6 SR 72 aircraft to be built for US Air force videos The Lockheed Martin SR-72 is a conceptualized unmanned, hypersonic aircraft intended for intelligence, surveillance and reconnaissance proposed by .\r
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The Lockheed Martin SR-72 is a conceptualized unmanned, hypersonic aircraft intended for intelligence, surveillance and reconnaissance proposed by .\r
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Lockheed Martin have announced plans to build a new hypersonic unmanned spy plane. The SR-72 will fly at Mach-6 thanks to jet and ramjet hybrid .