Technology Questions Remain on SR-72 The type of fuel the aircraft will use remains a major issue. The most logical choice is the JP-7 grade fuel or something even more exotic in order to achieve ...

While development on Lockheed Martin’s SR-72 has been kept secret, these are the five most exciting rumors about the jet. SR-72 ‘Darkstar’ Jet Rumors That Have Us Fascinated Tech & Auto ...

Lockheed Martin Skunk Works and Aerojet Rocketdyne have made a breakthrough in hypersonic propulsion technology, but the Mach 6.0-capable SR-72 remains more of aspiration than a real airplane. The ...

The SR-72’s promoters argue that “speed is the new stealth,” reflecting a growing belief in some quarters that improved networked sensors will eventually diminish the survivability of ...

Attempts to make hypersonic scramjets have so far ended in failure, but thats not going to stop Lockheed from working on a 4,500-mph drone meant to be the SR-72.