A practical application of an ejection type aircraft, which is considered to be useful for exploration in a severe environment like planetary exploration etc. requires a launch device capable of ensuring the reproducibility of the flight path and speed. However, the design method for the launch device has not been established. In this paper, we first analyze the behavior when a people let fly a flying dragonfly propeller known as “taketombo” using gaze measurement and analysis. Next, we try to extract the design information for the launch device from the behavior analysis.