J. Gibs

Effect of at-the-source noise reduction on performance and weights of a tilt-rotor aircraft

W. Z. Stepniewski, R. Spencer, J. Gibs, 1975 .

A comparison of optimal and noise-abatement trajectories of a tilt-rotor aircraft

W. Z. Stepniewski, F. H. Schmitz, J. Gibs, 1972 .

Effects of Noise Reduction on Characteristics of a Tilt-Rotor Aircraft

W. Z. Stepniewski, R. Spencer, J. Gibs, 1976 .

Noise reduction of a tilt-rotor aircraft including effects on weight and performance

W. Z. Stepniewski, R. Spencer, J. Gibs, 1973 .