TY - RPRT TI - Improving Tiltrotor Whirl-Mode Stability with Rotor Design Variations AU - Acree, C. W., Jr. AU - Peyran, R. J AU - Johnson, Wayne AU - Aiken, Edwin W. PY - 2000 UR - https://ntrs.nasa.gov/citations/20000114842 ID - 20000114842 ER -