風洞模型によるロータの空力特性とブレードフラッピング運動の計測

抄録

Problems and accuracy of a wind tunnel test on a model helicopter are discussed from educational points of view. The rotor blade flapping motions and its aerodynamic characteristics were measured in forward flight, and their results are compared with well established data. The measurements confirm the coupling between longitudinal and lateral flap angles, and the effects of lock number and thrust levels on blade flapping motions. It is ascertained that the radio controlled model helicopter with suitable modifications is an effective instruction apparatus useful for understanding the basic aerodynamic and dynamic properties of a helicopter rotor.