Experience this amazing supersonic near space flight through on board HD video. Curt von Delius's state of the art PHX4 launched on June 16, 2018 from the Black Rock Desert, Nevada. Accelerating to over 3.5 times the speed of sound the rocket coasted to 46 miles above sea level. This is the highest flight of any amateur two stage rocket. The reusable design was recovered using Disc Gap Band Parachutes and touched down 6.36 miles from launch.