Hewitt-Sperry Automatic Airplane for eight years, and yet Sperry became intrigued with the concept of applying radio control to them. He realized that for radio control to be effective, automatic stabilization would be essential, so he decided to adapt his naval gyro-stabilizers (which he had developed for destroyers). In 1913, the Navy provided a flying boat to test and evaluate the gyro-based autopilot. Sperry's son Lawrence served as an engineer during the test phase. In 1914, Lawrence Sperry was in Europe and observed the developing techniques of aerial warfare, including the use of aircraft. In 1916, the two Sperrys joined Peter Hewitt, an
International Tennis Club of Washington International Tennis Club of Washington The International Tennis Club of Washington plays real tennis on Prince's Court at the Regency Sport and Health Club in McLean, Virginia, 6 miles (10 km) from Washington, D.C. Dedicated on October 11, 1997, Prince's is the only new real tennis venue to be constructed in the United States since the Racquet Club of Chicago was built in 1923. (The Chicago court has since been renovated and renewed.) The court, named after financial supporter and club co-founder Frederick H. Prince, features an 18 foot (5.5 m) high main wall made of plate glass giving spectators