Lockheed Martin’s SR-72 “Darkstar” could be real. From Top Gun fame to Mach 6 specs, here’s what we know about the hypersonic spy plane’s future.

A model of a Lockheed Constellation built from a non-standard scales nearly 60 years old. Back then, most models were designed to fit a very specific box size. [Courtesy: Terry Moore] Scale model ...

Key Points and Summary – Skunk Works’ SR-72 concept chases the Blackbird’s core idea—speed as survival—with a turbine-based combined cycle (TBCC) engine to take off like a jet and cruise like a ...