electropult

\\ə̇ˈlektrəˌpəlt, -pu̇lt\ noun (-s)

Etymology: electr- + -pult (as in catapult)

: an electrical catapult for accelerating airplanes to takeoff speed on a short runway that consists of a car and a track which react with each other as the stator and rotor of an induction motor to give the car great acceleration when enormous electrical power is supplied for a short time