This report presents work performed under a Cooperative Research Agreement between Virginia Tech and the NASA Langley Research Center. The work involved development of computational techniques for modeling helicopter rotor/airframe aerodynamic interaction. A brief overview of the problem is presented, the modeling techniques are described, and selected example calculations are briefly discussed.Barnwell, Richard W. and Prichard, Devon S.Langley Research CenterCOMPUTER PROGRAMS; MODELS; ROTOR BODY INTERACTIONS; INTERACTIONAL AERODYNAMICS; FUSELAGES; AIRFRAMES...