| 摘要 |
PROBLEM TO BE SOLVED: To provide a flight vehicle, performing stable flight without an attitude stabilizing means such as a stabilizer, advantageous to reduction in weight, and reducing a voltage drop or loss of power between a solar battery and a circuit part and between an ultrasonic motor and the circuit part. SOLUTION: This flight vehicle includes: a rotor having a plurality of rotary blades; and a shaft rotatably supporting the rotor, wherein the flight vehicle flies by thrust generated by the rotation of the rotary blades. The rotor is provided with the solar battery 71, the ultrasonic motor having a vibrator 4 with a contact part and a piezoelectric element; and a circuit part having a charging part and a driving circuit. The vibrator 4 is vibrated by applying AC voltage to the piezoelectric element by the driving circuit. The force is repeatedly applied to the outer peripheral part of the shaft through the contact part by the above vibration, and the rotor 3 is rotated with the vibrator 4 itself by the reaction force received from the outer peripheral part of the shaft. COPYRIGHT: (C)2006,JPO&NCIPI
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