TY - RPRT TI - Helicopter model rotor-blade vortex interaction impulsive noise: Scalability and parametric variations AU - Splettstoesser, W. R. AU - Schultz, K. J. AU - Boxwell, D. A. AU - Schmitz, F. H. PY - 1984 UR - https://ntrs.nasa.gov/citations/19850008517 ID - 19850008517 ER -