Before revision: Graupner 'Kinematic' escapement for model boat rudder control, circa 196 Centrifugal fly-ball actuator Centrfugal fly-ball actuatorThe fly-ball actuator was introduced to R/C modelling in 1951 by Brayton PaulRadio Controll Hall of Fame, Flyball actuator by Brayton Paul, and consisted of an electric motor connected to a centrifugal expansion mechanism with fly-balls at the joints, connected to a free-running axis that could, with the motor running, pull a rudder control rod by varying degrees.
After revision: Graupner 'Kinematic' escapement for model boat rudder control, circa 1965 Centrifugal fly-ball actuator Centrfugal fly-ball actuatorThe fly-ball actuator was introduced to R/C modelling in 1951 by Brayton PaulRadio Controll Hall of Fame, Flyball actuator by Brayton Paul, and consisted of an electric motor connected to a centrifugal expansion mechanism with fly-balls at the joints, connected to a free-running axis that could, with the motor running, pull a rudder control rod by varying degrees.