Lockheed Martin unveils SR-72

摘要

In early November Lockheed Martin unveiled details of its design for the SR-72: an optionally manned hypersonic aircraft that could be used for surveillance and strike missions. The news gained widespread media attention in the United States, but the challenges of building a flyable hypersonic aircraft remain considerable. Only components of the SR-72 design have been tested so far, paid for with Lockheed Martin's own funds, according to Brad Leland, who manages Lockheed Martin's air-breathing hypersonic technologies.