Accession Number : ADA182140

Title :   An Experimental Investigation of the Aeromechanical Stability of a Hingeless Rotor in Hover and Forward Flight.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER

Personal Author(s) : Yeager,William T , Jr ; Hamouda,M-Nabil H ; Mantay,Wayne R

PDF Url : ADA182140

Report Date : Jun 1987

Pagination or Media Count : 20

Abstract : Analysis and testing were conducted in the Langley Transonic Dynamics Tunnel to investigate the aeromechanical stability of a soft inplane hingeless rotor model. Rotor stability data were obtained in hover and in forward flight up to an advanced ratio of 0.35. Model rotor parameters evaluated were blade sweep and droop, pre-cone of the blade feathering axis, and blade pitch-flap coupling. Data obtained during these tests are presented without analysis. Keywords: Hovering; Hingeless helicopter rotor dynamics; Helicopter rotor blades; Ground resonance.

Descriptors :   *HINGELESS, *ROTOR BLADES(ROTARY WINGS), *AERODYNAMIC STABILITY, *TRANSONIC WIND TUNNELS, AERODYNAMIC LOADING, MECHANICS, STABILITY, GROUND LEVEL, RESONANCE, DYNAMICS, HELICOPTER ROTORS, MODELS, ROTORS, HOVERING, LEVEL FLIGHT, WIND TUNNEL TESTS

Subject Categories : Fluid Mechanics
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE