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In succession to the world-first introduction of a mass production gasoline hybrid passenger car into the Japanese market in 1997, Toyota also has introduced an enhanced version of the above to the US and European markets in 2000. Upon introduction of Toyota Hybrid System (THS) into the US market, a drastic reduction of gasoline vapor evaporation from the fuel tank was necessary, in order to meet the most stringent exhaust emission (SULEV) and evaporative emission standards in the world. In order to meet this requirement, a fuel tank system named “Vapor Reducing Fuel Tank System” was developed. This is the first commercial application in the world to use a variable tank volume to drastically reduce gasoline vapor generation.

The basic concept of unmanned aerial vehicle (UAV) powered by microwave is defined first by specially developed CAD software. Tele-communication relay or earth observation platform is its possible application. Some preliminary research programs including propeller efficiency, electric power plant, basic structural concepts and material testings are undergoing at NAL. The present paper demonstrates the results of a structural concept study and early strength characterization at room and low(= -60 °C) temperature points for a system of CF/thermoplastic composite as one of candidate material of main structures. The concerned strength drop due to a wide difference of the low temperature environment from the processing point of CF/PEEK can not be observed.