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A Study on Experimental Test of a Small Scale Hingeless Rotor

축소형 무힌지 로터 시험에 관한 연구

  • 김준호 (한국항공우주연구원) ;
  • 송근웅 (한국항공우주연구원) ;
  • 주진 (한국항공우주연구원) ;
  • 석진영 (충남대학교 항공우주공학과)
  • Received : 2011.05.25
  • Accepted : 2011.10.05
  • Published : 2011.12.01

Abstract

It is possible to study the load characteristics of full-scale hingeless rotor with the changing of physical smallscaled configurations such as rectangular and paddle blades, and metal and composite hubs. In this study, a static test, and a ground and wind-tunnel test were carried out using small-scale rotor models. The static test was carried out to confirm structural stiffness, characteristics of inertia, natural frequency, and damping ratio of rotors, and the ground and wind-tunnel test was carried out to confirm the stability and aerodynamic characteristics under hovering and forward flight conditions. According to the test results, the vertical load in the case of a combination of a small composite hub with paddle blades was higher than that in the case of a metal hub with paddle blades at same condition. Further, it was confirmed that the restraint of the combination of composite hub can be more flexible than the metal hub for the motion of paddle blades.

Keywords

Helicopter;Similarity;Scale;Hingeless;Rotor;Wind-Tunnel Test

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