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. Further progress on the design depends on whether or not American officials select it for development under both DARPA's Advanced Full Range Engine program and the US Air Force's Turbine-Based Combined Cycle study. If it does go ahead, it'll be a while before there's a production aircraft. Boeing would start by making a single-engine proof of concept vehicle (roughly the size of an F-16 Falcon) and would move on to a full-sized, dual-engine v...