Breakthrough for hypersonic jet that could fly at Mach 25
A British effort to build a revolutionary “spaceplane” that would fly at 25 times the speed of sound has passed a critical testing milestone.
Reaction Engines, which is based in Oxfordshire, has tested a “pre-cooler” — a technology that could allow aircraft to travel faster than ever before — at simulated speeds of Mach 3.3, or more than three times the speed of sound.
