Experimental Helicopter Tested. Men carry a tripod helicopter and place it down. Man adjusts some tank valves. Finger touches a blade or something. Man wearing crash helmet sits down in the tripod seat. Shots of him testing the controls with his feet and hands. Tail rotator blade begins to spin. Helicopter lifts off from ground. Heliopter comes down, touches the ground for a second and goes straight up. It flies towards and over the camera.