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Boeing shows its vision for a hypersonic spy aircraft
Lockheed isn't the only one hoping to make a hypersonic spy aircraft. Boeing has provided early details on its own design for a hypersonic tech demonstrator that would lead to a spiritual successor to the SR-71 Blackbird. In some ways, it's a logical extension of the company's X-51A Waverider: the wedge-shaped, twin-tail body is designed to minimize drag while gulping in as much air as possible. It would be about as long as the Blackbird, but its Mach 5-plus top speed would leave the older Mach 3.2 jet far behind.
