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The Design of Plywood Webs for Airplane Wing Beams

Description: This report deals with the design of plywood webs for wooden box beams to obtain maximum strength per unit weight. A method of arriving at the most efficient and economical web thickness, and hence the most suitable unit shear stress, is presented and working stresses in shear for various types of webs and species of plywood are given. The questions of diaphragm spacing and required glue area between the webs and flange are also discussed.
Date: November 27, 1929
Creator: Trayer, George W.
Partner: UNT Libraries Government Documents Department
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Cantilever Wings for Modern Aircraft: Some Aspects of Cantilever Wing Construction with Special Reference to Weight and Torsional Stiffness

Description: In the foregoing remarks I have made an attempt to touch on some of the structural problems met with in cantilever wings, and dealt rather fully with a certain type of single-spar construction. The experimental test wing was a first attempt to demonstrate the principles of this departure from orthodox methods. The result was a wing both torsionally stiff and of light weight - lighter than a corresponding biplane construction.
Date: November 1929
Creator: Stieger, H. J.
Partner: UNT Libraries Government Documents Department
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The Effect of Fuel Consumption on Cylinder Temperatures and Performance of a Cowled Wright J-5 Engine

Description: Given here are the results of tests made to determine the effect of fuel consumption on the cylinder temperatures and the performance of a cowled Wright J-5 engine. The results of these tests indicate that enriching the mixture by increasing the carburetor size results in a reduction in cylinder head and barrel temperatures. The cylinders shielded by the magnetos or the points on the cylinder that do not receive a free flow of cooling air increase most rapidly in temperature as the mixture is leaned.
Date: November 1929
Creator: Schey, Oscar W.
Partner: UNT Libraries Government Documents Department
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Mathematical and Experimental Investigation of Heat Control and Power Increase in Air-Cooled Aircraft Engines

Description: In order to understand the numerical relations between the air velocity, temperature of the cylinder walls, heat dissipation, cylinder dimensions and type of construction an experimental plant was installed in the Siemens and Halske laboratory. The experimental cylinder was exposed to the air stream of a wind tunnel. The compression chamber was heated by an electrically heated oil bath kept constantly in motion by a stirrer. The wall temperatures were measured by thermocouples.
Date: November 1929
Creator: Gosslau, F.
Partner: UNT Libraries Government Documents Department
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Some Studies on the Aerodynamic Effect of the Gap Between Airplane Wings and Fuselages

Description: "The general result indicated by this study is that if desirable from any viewpoint the gap between wing and fuselage may be closed without detrimental aerodynamic effects, and with a given monoplane there is less drag if the wing is directly on top of the fuselage than if it is parasol" (p. 1).
Date: November 1929
Creator: Ober, Shatswell
Partner: UNT Libraries Government Documents Department
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Technical Details in the Structural Development of Rohrbach Seaplanes

Description: "The recent trial flights and acceptance tests of the Rohrbach "Romar," the largest seaplane in the world, have yielded results fully confirming the principles followed in its development. Its take-off weight of 19,000 kg, its beating the world record for raising the greatest useful load to 2000 m by almost 2500 kg and its remarkable showing in the seaworthiness tests are the results of intelligent researches, the guiding principles of which are briefly set forth in this article" (p. 1).
Date: November 1929
Creator: Mathias, Gotthold & Holzapfel, Adolf
Partner: UNT Libraries Government Documents Department
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Unsymmetrical Forces in an Airplane Cell

Description: This paper calls attention to the desirability of expanding airplane building regulations to include proof of safety for cases of unsymmetrical loading, at least in the structural members which are thereby specially stressed. The flight cases involve increases of the customary load assumptions through rudder deflection and aileron deflection.
Date: November 1929
Creator: Vogt, R.
Partner: UNT Libraries Government Documents Department
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Blériot Combat Monoplane 127 (French)

Description: The 127 is a cantilever monoplane without external bracing. It is designed to accompany and protect bombardment and observation aircraft. Descriptions of the airfoil, fuselage, power plant, landing gears, and armament are provided.
Date: November 1928
Partner: UNT Libraries Government Documents Department
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Determination of the Air Forces and Moments Produced by the Ailerons of an Airplane

Description: As a rule, the actual lift distribution at the wing tips shows deviations from the theoretical distribution, so that an approximate evaluation of the distribution may be regarded as satisfactory. After a few brief remarks on the fundamentals of the exact computation, the method will be so presented that the lift distribution for deflected ailerons may be determined for other values of the parameter p from the results already obtained. Coefficients will then be given in the form of diagrams and numerical tables, from which the desired forces and moments can be easily obtained by substitution in the given equations.
Date: November 1928
Creator: Wieselberger, C. & Asano, T.
Partner: UNT Libraries Government Documents Department
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Drag and Cooling With Various Forms of Cowling for a Whirlwind Engine in a Cabin Fuselage

Description: An investigation on the cowling of radial air-cooled engines was conducted in the 20-foot Propeller Research Tunnel at Langley Field. Cooling and drag tests were made with each form of cowling. The propulsive efficiency was found to be practically the same with all forms of cowling.
Date: November 1928
Creator: Weick, Fred E.
Partner: UNT Libraries Government Documents Department
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The Gloster "Goldfinch" (British): Single-Seat Fighter

Description: The Goldfinch is equipped with the Bristol Jupiter Mark Vii engine. It is the all metal version of the Gloster Gamecock used by the R.A.F. A description of the construction, components, flying qualities, characteristics, drawings, and photographs are provided.
Date: November 1928
Partner: UNT Libraries Government Documents Department
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On the Take-Off of Heavily Loaded Airplanes

Description: This report examines the take-off conditions of airplanes equipped with tractive propellers, and particularly the more difficult take-off of airplanes heavily loaded per unit of wing area (wing loading) or per unit of engine power (power loading).
Date: November 1928
Creator: Breguet, Louis
Partner: UNT Libraries Government Documents Department
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The Variation in Pressures in the Cockpit Fan Airplane in Flight

Description: "The results of an investigation to determine the pressures in the open cockpit of a Vought VE-7 airplane are given. The information has been considered valuable on account of its possible effect upon the operation of instruments, particularly altimeters, due to a variation from the true static pressure which is induced by the passage of the airplane through the air. The observed values are small and the effect upon instruments is inconsiderable" (p. 1).
Date: November 1928
Creator: Carroll, Thomas & McAvoy, William H.
Partner: UNT Libraries Government Documents Department
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"Villiers 24" Slotted-Wing Airplane (French): Night Pursuit Sesquiplane

Description: The Villiers 24 C.A.N. 2 is a night pursuit sesquiplane equipped with the 450 HP direct-drive Lorraine 12 Eb engine. It is characterized by Handley Page slotted wings. Details of the construction, wings, flaps, controls, characteristics, performances, drawings, and photographs are provided.
Date: November 1928
Partner: UNT Libraries Government Documents Department
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Characteristics of Five Propellers in Flight

Description: "This investigation was made for the purpose of determining the characteristics of five full-scale propellers in flight. The equipment consisted of five propellers in conjunction with a VE-7 airplane and a Wright E-2 engine. The propellers were of the same diameter and aspect ratio. Four of them differed uniformly in thickness and pitch and the fifth propeller was identical with one of the other four with exception of a change of the airfoil section" (p. 267).
Date: November 8, 1927
Creator: Crowley, J. W., Jr. & Mixson, R. E.
Partner: UNT Libraries Government Documents Department
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Approximation method for determining the static stability of a monoplane glider

Description: The calculations in this paper afford an approximate solution of the static stability. A derivation of the formulas for moment coefficient of a wing, moment coefficient of elevator, and the total moment of the combined wing and elevator and the moment coefficient with reference to the center of gravity are provided.
Date: November 1927
Creator: Lippisch, A.
Partner: UNT Libraries Government Documents Department
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The Distribution of Loads Between the Wings of a Biplane Having Decalage

Description: "It is known that in a biplane the load is not distributed equally between the wings. The presence of one wing will affect the lift characteristics of the other wings. A designer must know the total load that each wing carries in order that he may design an adequate structure. The purpose here is to determine the distribution of loads between the wings of a biplane at various angles of decalage, when the gap/chord ratio is one, and there is no stagger" (p. 1).
Date: November 1927
Creator: Mock, Richard M.
Partner: UNT Libraries Government Documents Department
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Experiments on Airfoils With Aileron and Slot

Description: The present report contains the results of a few experiments on three airfoils to which the rear portions, having chords respectively 1/4, 1/3, and 2/5 of the total chords, are hinged so as to form ailerons, especial attention being given to the shape of the slot between the aileron and the main portion of the aileron.
Date: November 1927
Creator: Betz, A.
Partner: UNT Libraries Government Documents Department
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Lockheed "Vega" airplane: a commercial cabin monoplane

Description: The Vega is a high wing monoplane suitable for commercial purposes. It can seat 6 passengers or 100 cubic feet of cargo. Various characteristics of the aircraft are described, including the wings, control surfaces, landing gear, and power plant.
Date: November 1927
Partner: UNT Libraries Government Documents Department
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The Pitcairn "Mailwing" PA-5: A Single-Seat Commercial Biplane

Description: The Mailwing is a single seat biplane designed primarily for mail and express delivery. It has a cargo capacity of 500 to 600 lbs. Details regarding the construction, engine, fuel tank, wings, tail, landing gear, propeller, control, characteristics, performance, drawings, and photographs are provided.
Date: November 1927
Partner: UNT Libraries Government Documents Department
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Practical Underground Education of the Coal Miner

Description: Report describing information that should be provided for miners when they are first being trained on-site, as well as an explanation about the education program offered by the Practical Mining School at Dawson, New Mexico.
Date: November 1927
Creator: Grove, G. W.
Partner: UNT Libraries Government Documents Department
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