DTIC AD0869390: An Experimental Investigation of the Effects of Rotor Head Configuration and Fuselage Yaw on the Wake Characteristics and Rotor Performance of a 1/8th Scale Helicopter

by: Defense Technical Information Center

Publication date: 1970-02-01

Topics: DTIC Archive, Linville, James C, UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV, *FUSELAGES, *HELICOPTER ROTORS, CONFIGURATIONS, MODEL TESTS, PERFORMANCE(ENGINEERING), ROTOR BLADES(ROTARY WINGS), SCALE, STRESSES, VIBRATION, WAKE, YAW,

Collection: dticarchive; additional_collections

Language: English

The report presents the results of an experimental investigation of the effects of rotor head configuration and fuselage yaw on the wake characteristics and rotor performance of a generalized 1/8th scale helicopter model. Several rotor head configurations were tested with and without rotor blades at various operating conditions. Fuselage yaw angle was varied for all conditions tested. The flow direction and dynamic pressure at the tail of the model were measured, as were rotor shaft forces and moments. When the model was tested with the rotor, blade vibratory stresses were measured. Wake survey data were obtained with and without rotor blades; however, the data obtained with blades were not consistent.