SR-72 Darkstar: The Hypersonic Successor to the SR-71 The SR-72 Darkstar, developed by Lockheed Martin, is rumored to reach speeds of Mach 6—twice as fast as the legendary SR-71 Blackbird. If realized, it would become the fastest aircraft ever built. Designed for intelligence, surveillance, and rapid strike missions, the SR-72 represents a new era where speed replaces stealth. At hypersonic velocity, reaction time becomes nearly impossible. Important Details: • Estimated top speed: Mach 6 • Hype

412K views · 1.4K reactions | The Lockheed SR-71 "Blackbird" is a long-range, high-altitude, Mach 3+ strategic reconnaissance aircraft that was operated by the United States Air Force. It was developed as a black project from the Lockheed A-12 reconnaissance aircraft in the 1960s by Lockheed and its Skunk Works division. | War History Online | Facebook