Free-tip-rotor wind-tunnel test resultsSeven controller mechanisms and several tip geometries were proposed and evaluated in the course of a free tip rotor development program which integrated those components into a model rotor system for wind tunnel testing. After a rigid whirl test was run to determine controller mechanism performance and structural integrity, a second whirl test was performed with a model rotor incorporating a selected controller design and a selected tip platform to determine the transient behavior of the tips in response to aerodynamic excitation. The results obtained demonstrate that a swept, tapered tip with a tension-torsion strap controller furnished satisfactory mechanical operation, achieved the specified output torque, possessed a low spring rate, and had fast and stable response to excitation.
Document ID
19860050890
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stroub, R. H. (NASA Ames Research Center Moffett Field, CA, United States)
Young, L. A. (NASA Ames Research Center Moffett Field, CA, United States)
Keys, C. (NASA Ames Research Center Moffett Field, CA, United States)
Cawthorne, M. (Boeing Vertol Co. Philadelphia, PA, United States)