S2002-2-6 ブーメラン紙コップの製作と軌道解析(技術教育・工学教育(2),社会変革を技術で廻す機械工学)

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Department of Robotics Engineering in Tokyo Metropolitan College of Industrial Technology has many researches in the author's laboratory, Developments, experiments and analyses of various children's toys. For example, boomerangs with three wings, PET Bottle Rockets, boomerang stunt planes, flying rings and boomerang dragonflies are developed and analyzed by simple equations of motion. The analytical results can explain the experiments. A boomerang paper cup is shape to connect two paper cups. Three connected rubber bands are wrapped around the circumference part at the center of the paper cup. The hand with the point of the rubber band is vertical and upward with ground. When it flies, it draws the elliptical orbit and comes back at hand. The loci of boomerang paper cup were analyzed by simple equations of motion and Runge-Kutta method analyzed results coincide very well with other experiments.sss
2010-09-04