Pilot tries to fly French helicopter Doemichen with and without aid of gas bag.

Doemichen 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.