HELICOPTERS

Duration: 20 min

Year Published: 1958

Creator: Department of the Army (Department of Defense)

Color: B&W

Sound: Optical sound

Description: Depicts the historical development of the helicopter from the fifteenth century to the present and shows several types of helicopters in use by the military services as well as some experimental models. Discusses basic helicopter flight principles, including gravity, lift, thrust, drag, torque, dissymmetry of lift, and the effects of collective and cyclic pitch change. Shows flight control in a typical helicopter and some civil and military applications of the helicopter.