The effect of helicopter main rotor blade phasing and spacing on performance, blade loads, and acoustics, Volume 2737
Santu T. Gangwani, United States. National Aeronautics and Space Administration, Systems Research Laboratories. Rasa Division
National Aeronautics and Space Administration, 1976 - Aerodynamic load - 97 pages
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0.25 for various acoustic characteristics advance ratio aerodynamic loads angle of attack axial spacing azimuthal spacing blade loads blade passage frequency blade pitching chord length chordwise bending chordwise hinge shear computed configurations 20 000 control settings conventional six-bladed rotor effect factor Flap flapwise bending flapwise hinge shear flight condition forward flight harmonic of blade Harmonics of chordwise Harmonics of flapwise Helicopter Rotor l.0 and Aip Level Level Level loads and acoustic loads and response lower rotor blades magnitude moments at r/R natural frequencies noise Figure nth harmonic parameters pitching moments presented in Figure rad/sec radial response program rotational and vortex Rotor Noise rotor separation separated rotors shear for various shears and moments six-bladed rotor system Spectrum of rotational standard six-bladed rotor three-bladed rotor thrust torque trailed vortices upper rotor blades variable geometry rotor variation various VGR configurations VGR configurations 20 VGR system vortex element wake geometry