The Nature of Vortex Ring State

The Velocity of Viscous Vortex Rings

P. G. Saffman · Studies in Applied Mathematics · 1970 · 278 citations

Natural Sciences, Physics, Fluid Dynamics +14

Empirical Relation Between Induced Velocity, Thrust, and Rate of Descent of a Helicopter Rotor as Determined by Wind-tunnel Tests on Four Model Rotors

Walter Castles, Robin B. Gray · University of North Texas Digital Library (University of North Texas) · 1951 · 47 citations · Full text

Engineering, Aerospace Engineering, Aerodynamics +16

Tiltrotor Descent Aerodynamics: A Small-Scale Experimental Investigation of Vortex Ring State

Mark D. Betzina · AHS International Forum 57 · 2001 · 33 citations

Engineering, Aerospace Engineering, Mechanical Engineering +17

Airflow Patterns in the Neighbourhood of Helicopter Rotors

Ir. J. Meijer Drees, Ir. W.P. Hendal · Aircraft Engineering and Aerospace Technology · 1951 · 29 citations

Engineering, Aerospace Engineering, Aerodynamics +15

First-Principles Free-Vortex Wake Analysis for Helicopters and Tiltrotors

Boschitsch, Quackenbush, Wachspress · AHS International Forum 59 · 2003 · 29 citations

Engineering, Aerospace Engineering, Aerodynamics +11