A Flight Investigation of the Effects of Compressibility on Applied Gust Loads

A Flight Investigation of the Effects of Compressibility on Applied Gust Loads
Author: Earle T. Binckley
Publisher:
Total Pages: 28
Release: 1949
Genre: Airplanes
ISBN:

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Two jet-propelled airplanes were flow at different speeds in rough air to investigate the effects of compressibility on applied gust loads at Mach numbers up to 0.68. The results indicated that no compressibility correction to the slope of the lift curve was necessary.

Compressibility Effects on the Longitudinal Stability and Control of a Pursuit-type Airplane as Measured in Flight

Compressibility Effects on the Longitudinal Stability and Control of a Pursuit-type Airplane as Measured in Flight
Author: William N. Turner
Publisher:
Total Pages: 72
Release: 1945
Genre: Airplanes
ISBN:

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Measurements of the longitudinal stability and control of a pursuit-type airplane (the P-39N-1 airplane) were made in flight up to a Mach number of 0.78. The data are presented in the form of curves showing the variation, with center-of-gravity position, dynamic pressure, and Mach number, of the stick-fixed and stick-free stability, control, and balance of the airplane.

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 1126
Release: 1987
Genre: Aeronautics
ISBN:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Calculated Responses of a Large Sweptwing Airplane to Continuous Turbulence with Flight-test Comparisons

Calculated Responses of a Large Sweptwing Airplane to Continuous Turbulence with Flight-test Comparisons
Author: Floyd V. Bennett
Publisher:
Total Pages: 36
Release: 1960
Genre: Airplanes
ISBN:

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Summary: Calculated responses of symmetrical airplane motions, wing deformations, and wing loads due to continuous turbulence are shown to compare favorably with available flight-test results. These calculated responses are based on random-process theory, five degrees of freedom, lifting-surface aerodynamics, and one-dimensional turbulence. Of the five degrees of freedom used only three, rigid-body translation and pitch modes and the first wing bending mode, are shown to contirbute significantly to the airplane responses over the frequency range considered (0 to 2 cps). Bending-moment amplification factors are presented in order to show the effects of dynamic aeroelasticity. These effects are found to increase the response by 35 to 115 percent, depending upon the spanwise station.