Slate refers to Leinweber brothers helicopter in Chicago. View of their helicopter being moved out of a hangar in 1922. Closeup of helicopter controls being demonstrated. Next, a helicopter of M. Douheret, of France, is shown in 1919. Men stand nearby and watch its rotors turn in the breeze. Engine cylinders are clearly visible. Pilot sits in the machine and adjusts controls. Next he stands and starts engine. Suddenly, the running helicopter tips over and he runs for safety but returns to shut the engine down. In a second attempt, the pilot is again seen standing next to the machine, with its engine running. And, again, he must run to safety, as it tips over. This time it stops running by itself, and other men help him tip it back upright.
Oemichen Helicopter testing with the aid of a gas bag. The French Helicopter is launched using balloons for additional lift. Plane rises short distant and then descends. Pilot sitting at controls of helicopter. Other testing of same helicopter showing action as plane swings back and forth like a pendulum, as the Pilot attempts to control it. Men holding the helicopter as it descends to prevent any accident. Testing of helicopter with gas bag lift, men hold on to helicopter and assist in controlling the helicopter.
Crowd gathered around viewing early helicopter with multiple tiers of rotating blades. Various VIPs attending the demonstration, including Argentine inventor of the helicopter, Raúl Pateras Pescara. View of people looking at helicopter. Tests in Issy France outside a large hangar shows helicopter rising from ground about six feet and then landing. Action is repeated. View of rotor blades, rotor columns and fuselage section of helicopter.
Emile Berliner and his son Henry Berliner, and other people gather around the helicopter. Henry Berliner in Berliner helicopter taking off in short flights and re-landing. This is one of the first machines which fly forward after rising vertically. Several views of test flying of the Berliner helicopter.
Ground testing of the de Bothezat quadrotor helicopter at McCook Field, hangar in background. Helicopter contraption demonstrating lift and movement on airfield. Men hanging on to side of helicopter assisting with its early flight.
Flight made by inventor, Professor George De Bothezat. De Bothezat sitting at the controls of the helicopter. Helicopter rising short distant and descending. Many views of helicopter rising and descending. Men watching.
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