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Simplified aerodynamic analysis of the cyclogiro rotating wing system

Description: A simplified aerodynamic theory of the cyclogiro rotating wing is presented herein. In addition, examples have been calculated showing the effect on the rotor characteristics of varying the design parameters of the rotor. A performance prediction, on the basis of the theory here developed, is appended, showing the performance to be expected of a machine employing this system of sustentation. The aerodynamic principles of the cyclogiro are sound; hovering flight, vertical climb, and a reasonable… more
Date: August 1933
Creator: Wheatley, John B.
Partner: UNT Libraries Government Documents Department
open access

A study of factors affecting the steady spin of an airplane

Description: Data from wind-tunnel tests on a model of the NY-1 airplane were used in a study of the effect on the steady spin of a number of factors considered to be important. The factors were of two classes, mass distribution effects and aerodynamic effects. The study indicated that mass extended along the longitudinal axis has no detrimental effect or is even slightly beneficial, mass extended along the lateral axis is detrimental if the airplane spins with the inner wing tip far down, and mass extended… more
Date: August 1933
Creator: Scudder, Nathan F.
Partner: UNT Libraries Government Documents Department
open access

A Summary of Design Formulas for Beams Having Thin Webs in Diagonal Tension

Description: "This report presents an explanation of the fundamental principles and a summary of the essential formulas for the design of diagonal-tension field beams, i.e. beams with very thin webs, as developed by Professor Wagner of Germany" (p. 1).
Date: August 1933
Creator: Kuhn, Paul
Partner: UNT Libraries Government Documents Department
open access

Dimensions of Twin Seaplane Floats

Description: This paper presents the characteristics of floats submitted to the test committee and the tests performed on them.
Date: August 1933
Creator: Meyer, L.
Partner: UNT Libraries Government Documents Department
open access

Development of the Rules Governing the Strength of Airplanes Part 3: Loading Conditions in France, Italy, Holland, and Russia - Aims at Standardization

Description: The historical development of the rules for structural strength of aircraft in the leading countries is traced from the beginning of flight to date. The term "factor of safety" is critically analyzed; its replacement by probability considerations has been considered desirable.
Date: August 1933
Creator: Küssner, H. G. & Thalau, Karl
Partner: UNT Libraries Government Documents Department
open access

Recent Results of Turbulence Research

Description: The first sections of this report deal with two prominent questions, namely the origin of turbulence and the characteristics of turbulent currents. In the third section conclusions are drawn for the flow along a rough wall, whereby an important relation for the velocity distribution is revealed. The principles are also applied to straight rough and smooth tubes.
Date: August 1933
Creator: Prandtl, L.
Partner: UNT Libraries Government Documents Department
open access

Present Status of Lateral-Control Devices for Use With Split Flaps, Special Report

Description: "The increased use of split flaps for the dual purpose of reducing the landing speed and shortening the landing glide of airplanes has established as acute the problem of obtaining satisfactory lateral control to be used in conjunction with the flaps with out the sacrifice of any of the effectiveness of the flaps. A large amount of work is being done on this problem by various organizations and individuals. Several of the devices developed seem usable, some of them unquestionably so" (p. 1).
Date: August 1933
Creator: Weick, Fred E.
Partner: UNT Libraries Government Documents Department
open access

Flight tests of the drag and torque of the propeller in terminal-velocity dives

Description: From Summary: "The drag and torque of a controllable propeller at various blade-angle settings, and under various diving conditions, were measured by indirect method on F6C-4 airplane in flight. The object of these tests were (1) to provide data on which calculations of the terminal velocity with a throttled engine and the accompanying engine speed could be based and (2) to determine the possibility of utilizing the propeller as an air brake to reduce the terminal velocity. The data obtained we… more
Date: August 22, 1933
Creator: Rhode, Richard V. & Pearson, Henry A.
Partner: UNT Libraries Government Documents Department
open access

Relation of Hydrogen and Methane to Carbon Monoxide in Exhaust Gases From Internal-Combustion Engines

Description: The relation of hydrogen and methane to carbon monoxide in the exhaust gases from internal-combustion engines operating on standard-grade aviation gasoline, fighting-grade aviation gasoline, hydrogenated safety fuel, laboratory diesel fuel, and auto diesel fuel was determined by analysis of the exhaust gases. Two liquid-cooled single-cylinder spark-ignition, one 9-cylinder radial air-cooled spark-ignition, and two liquid-cooled single-cylinder compression-ignition engines were used.
Date: August 17, 1933
Creator: Gerrish, Harold C. & Tessmann, Arthur M.
Partner: UNT Libraries Government Documents Department
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