Spike S-512 Supersonic Jet Will Produce Almost No Sonic Boom

The Spike S-512 Quiet Supersonic Jet over the City of London

Boston, MA, October 29, 2015 – Spike Aerospace revealed today that their S-512 Quiet Supersonic Jet, at its cruising speed of Mach 1.6 (1100mph), will produce a nearly inaudible sonic boom – less than 70 PLdB (perceived loudness level). When the aircraft flies overhead, someone on the ground will hear only a very soft, muffled […]