Military Hardware: Tanks, Bombers, Submarines and More Lockheed YF-12A Travelled at Mach 3.2 and 80,000 Feet But Ended Up Being Made Obsolete Thanks to Russian Missiles Lockheed’s YF-12A was a Mach 3.2 Cold War interceptor born from the same Skunk Works lineage that produced the A-12 and SR-71. Built to... Harrison KassMay 18, 2026
Military Hardware: Tanks, Bombers, Submarines and More At Mach 3, the XB-70 Valkyrie “Lost Pieces Bigger Than the YF-12” — One Test Pilot’s Bar Comeback That Became Aviation Legend In the mid-1960s, Lockheed’s Mach 3 YF-12 and North American Aviation’s Mach 3 XB-70 Valkyrie were both flying test missions out of Edwards Air... Brent M. EastwoodMay 8, 2026