1. Interactional Aerodynamics—A New Challenge to Helicopter Technology
2. The core is initially flattened by the passage of the rotor blade pressure distribution, and then recovers to itscircularshape. Airloads,M.LT. Aeroel.8mc.Res. Lab. Report, ASRL TR 178-1,March '75.
3. Egolf, T.A., and Landgrebe, A.J. "Helicopter RotorWakeGeometryandItsInfluenceinForward Flight".NASACR 3726,October 1983.
4. Lorber,P.F., and Egolf, T.A. "An Unsteady Helicopter Rotor-Fuselage Interaction Analysis", NASA CR4178,1988.