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This paper presents Nissan's new four-valve-per-cylinder direct injection (DI) diesel engine series consisting of a 2-liter class and 3-liter class. These engine series provide substantially improved power output along with lower noise and vibration levels, which have been traditional drawbacks of DI diesel engines. Nissan developed this engine series in response to the heightened need in recent years for passenger-car DI diesel engines with superior thermal efficiency, a characteristic advantageous for reducing CO2 emissions.

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.