An evaluation of linearized vortex theory as applied to single and multiple rotors hovering in and out of ground effect /
by Harry H. Heyson.

Description

Main Author: Heyson, Harry H.
Related Names: Langley Research Center.
Language(s): English
Published: Washington, [D.C.] : National Aeronautics and Space Administration, 1959.
Subjects: Vertical takeoff aircraft.
Upwash.
Tandem rotor helicopters.
Helicopter wakes.
Flow theory.
Flow distribution.
Aerodynamic interference.
Aerodynamic configurations.
Vortices.
Rotary wings.
Linear systems.
Hovering.
Ground effect (aerodynamics)
Full scale tests.
Note: "NASA TN D-43."
"Langley Research Center, Langley Field, Va."
"September 1959."
Title from cover.
Also available online from the NASA Technical Reports Server (http://ntrs.nasa.gov/). Address as of 11/02/06: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19890068425_1989068425.pdf.
Physical Description: 60 p. : ill. ; 26 cm.
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