U.S. Build Mysterious SR-72 Fastest Plane Ever | The SR-71’s Replacement - (We) Are The News
U.S. Build Mysterious SR-72 Fastest Plane Ever | The SR-71’s Replacement
Envisioned as an unmanned aircraft, the SR-72 would fly at speeds up to Mach 6, or six times the speed of sound. At this speed, the aircraft would be so fast,
