Military Tech Boeing To Unveil A Hypersonic Spy Plane That Can Fly At 3800-Mph | Innovation Discoveries The EngineerOctober 9, 2019January 13, 20201 Advertisement Boeing has recently unveiled a concept for the potential successor of the Blackbird SR-71 spy plane, called the ‘Son of Blackbird’. The plane is set to fly at 5 times the speed of sound. The plane can be a … Read More