Robert Sopher

Coupled Rotor/Airframe Vibration Analysis.

R. E. Studwell, Robert Sopher, Sebastian J. Cassarino, 1982 .

Application of Component Mode Synthesis to Modeling the Dynamic Response of Bearingless Main Rotors

Sikorsky Aircraft Div., Robert Sopher, S. Chen, 1992 .

Current Status of U.S. Army Comprehensive Helicopter Analysis System

Joon W. Lim, Robert Sopher, Brahmanda Panda, 2000 .

Prediction of aeroelastic response of a model X-wing rotor

Robert Sopher, James E. Duh, 1987 .

Substructure program for analysis of helicopter vibrations

Robert Sopher, 1983 .

Prediction of Control System Loads in Level Flight and Maneuvers

Sikorsky Aircraft Div., Robert Sopher, James E. Duh, 1994 .

Effects of Analytical Modeling Assumptions on the Predicted Stability of a Model Hingeless Rotor

Robert Sopher, Sebastian J. Cassarino, 1988 .