On his first pass , Sperry engaged the autopilot and flew past the grandstand with his hands held high off of the controls .
Sperry , along with his assistant Emil Cachin , made three passes in front of a grandstand full of spectators and military observers .
On Sperry 's first pass , Sperry engaged the autopilot and flew past the grandstand with his hands held high off of the controls .
Sperry , along with his assistant Emil Cachin , made three passes in front of a grandstand full of spectators and military observers .