Onlookers surround the Curtiss C-2 in which 21-year-old Lawrence Sperry demonstrated his Sperry gyroscopic stabilizer to win the Concours de la Securité en Aéroplane on June 18, 1914. (Glenn H. Curtiss Museum)
Onlookers surround the Curtiss C-2 in which 21-year-old Lawrence Sperry demonstrated his Sperry gyroscopic stabilizer to win the Concours de la Securité en Aéroplane on June 18, 1914. (Glenn H. Curtiss Museum)