Plane Engine Tested. Plane turns around on runway. Man checks out engine on the ground beside the plane. Men install prop engine into plane. Another man watches from cockpit window. A technician stands by a control panel while he takes notes on spinning propellor blade. CU of switches being flipped on control panel. Shot of propellor spinning. Man pulls his head back into the ccockpit. Plane taxis past the camera. It takes off from the runway; the landing gear folds up into body. Shot of cockpit instruments placed between the pilot and co-pilot. Shot of spinning propellor while in air. Shot of plane in the air from another plane.