1.

Technical Paper
Technical Paper
1. Wind-Tunnel Evaluation of the Effect of Blade Nonstructural Mass Distribution on Helicopter Fixed-System Loads
Wilbur, Matthew L. ; Yeager, William T., Jr. ; Singleton, Jeffrey D. ; Mirick, Paul H. ; Wilkie, W. Keats
Pub. info.: NASA Technical Reports.  19980018152  (NASA/TM-1998-206281),  pp.1-252,  1998.  National Aeronautics and Space Adminstration
2.

Technical Paper
Technical Paper
2. An aeroelastic analysis of helicopter rotor blades incorporating piezoelectric fiber composite twist actuation
Wilkie, W. Keats ; Park, K. C.
Pub. info.: NASA Technical Reports.  19960031942  (NASA-TM-110252),  pp.1-72,  1996.  National Aeronautics and Space Adminstration