TY - RPRT TI - Rotor systems research aircraft simulation mathematical model AU - Houck, J. A. AU - Moore, F. L. AU - Howlett, J. J. AU - Pollock, K. S. AU - Browne, M. M. PY - 1977 UR - https://ntrs.nasa.gov/citations/19780005098 ID - 19780005098 ER -