Theoretical Damping in Roll and Rolling Effectiveness of Slender Cruciform Wings

Theoretical Damping in Roll and Rolling Effectiveness of Slender Cruciform Wings
Author: Gaynor J. Adams
Publisher:
Total Pages: 40
Release: 1951
Genre: Airplanes
ISBN:

The coefficients of damping in roll and rolling effectiveness (with differential incidence of the horizontal surfaces) are determined for a slender, equal-span, cruciform wing. It is found that the coefficient of damping in ar roll is 62 percent greater than for a plane slender wing of equal aspect ratio, and that the rolling effectiveness is 53 percent less than for a plane slender wing of equal aspect ratio. The analysis can be used in the estimation of the characteristics of a slender, equal-span, cruciform wing having any specified distribution of normal velocity components on the horizontal and vertical surfaces.

Report

Report
Author: United States. National Advisory Committee for Aeronautics
Publisher:
Total Pages: 54
Release: 1956
Genre: Aeronautics
ISBN:

Linearized Theory of Steady High-Speed Flow

Linearized Theory of Steady High-Speed Flow
Author: G. N. Ward
Publisher: Cambridge University Press
Total Pages: 261
Release: 2016-02-25
Genre: Mathematics
ISBN: 1316601897

Originally published in 1955, this book is devoted exclusively to the problems involved in solving the non-linear equations of motion for compressible fluids.

Wind-tunnel Studies of the Performance of Multirotor Configurations

Wind-tunnel Studies of the Performance of Multirotor Configurations
Author: Richard C. Dingeldein
Publisher:
Total Pages: 650
Release: 1954
Genre: Rotors (Helicopters)
ISBN:

The power requirements measured in static thrust and in level forward flight are presented for two helicopter rotor configurations. One is a coaxial rotor arrangement having the rotors spaced approximately 19 percent of the rotor radius; the other is a tandem configuration in which the rotor-shaft spacing is 3 percent greater than the rotor daimater and in which the rotors lie in the same plane. The experimental meausrements are compared with the results of calculations based on existing NACA single-rotor theory.