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The Mono-Spar Light Airplane (British): A Twin-Engined Low-Wing Cabin Monoplane

Description: Circular presenting a description of the Mono-Spar light airplane, which is a small twin-engined low-wing cabin monoplane. A description of the design, structural features, characteristics, flying qualities, photographs, and drawings are provided.
Date: July 1931
Partner: UNT Libraries Government Documents Department
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Leaching Oxidized Copper Ores: Effect of Strength of Acid in Leaching Solvent

Description: Report issued by the U.S. Bureau of Mines on the leaching of copper ores. The different strengths and cycles of solvents to extract impurities from the ore are presented. This report includes tables and graphs.
Date: July 1931
Creator: Sullivan, John D. & Oldright, G. L.
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in June, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of June, 1931. The number of fatalities and the causes of each are presented. This report includes tables and a graph.
Date: July 1931
Creator: Adams, William Waugh & Chenoweth, L.
Partner: UNT Libraries Government Documents Department
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Fire Prevention on Aircraft

Description: The following discussion is at first restricted to the light-oil engines now in use. We shall consider how far it is possible to reduce fire hazards by changes in the design of the engines and carburetors and in the arrangement of the fuel pipes.
Date: July 1931
Creator: Kühn, Fritz
Partner: UNT Libraries Government Documents Department
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The Dangerous Flat Spin and the Factors Affecting It

Description: This report deals first with the fundamental data required for the investigation. These are chiefly the aerodynamic forces and moments acting on an airplane in a flat spin. It is shown that these forces and moments depend principally on the angle of attack and on the rotation about the path axis, and can therefore either be measured in a wind tunnel or calculated from wind-tunnel measurements of lift, drag and moment about the leading edge of the wing of an airplane model at rest.
Date: July 1931
Creator: Fuchs, Richard & Schmidt, Wilhelm
Partner: UNT Libraries Government Documents Department
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Metal-Truss Wing Spars

Description: The purpose of the study was to develop improvements in the current methods for the calculation of the loads in members of metal truss wing spars which are subjected to combined bending and compression. The theory developed here has two important practical applications. One is the calculation of the effective moment of inertia of a truss spar from the geometry of the spar and the loads to which the spar is to be subjected. The second is the determination of the most economical location of metal… more
Date: July 1931
Creator: Swickard, Andrew E.
Partner: UNT Libraries Government Documents Department
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The Effect of Injection-Valve Opening Pressure on Spray-Tip Penetration

Description: "The effect of various injection-valve opening pressures on the spray-tip penetration was determined for several injection pressure. A common-rail fuel injection system was used. For a given injection pressure a maximum rate of penetration was obtained with an injection-valve opening pressure equal to the injection pressure" (p. 1).
Date: July 1931
Creator: Rothrock, A. M. & Marsh, E. T.
Partner: UNT Libraries Government Documents Department
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Tests of Six Symmetrical Airfoils in the Variable Density Wind Tunnel

Description: "This paper is the first of a series covering an investigation of a family of airfoils all formed from a basic profile. It gives in preliminary form the results of six symmetrical airfoils, differing only in maximum thickness. The maximum thickness-to-chord ratios are 0.06, 0.09, 0.12, 0.15, 0.18, and 0.21" (p. 1).
Date: July 1931
Creator: Jacobs, Eastman N.
Partner: UNT Libraries Government Documents Department
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Superchargers

Description: "It seems hardly necessary to use a supercharger near sea level simply to mix the gases. The importance of the supercharger will increase with the use of heavy fuels. Before long we shall probably be using two-stroke-cycle and four-stroke-cycle scavenging engines on airplanes. In accord with the present tendency, we shall present here the French solutions of the problem in a practical rather than in a purely theoretical manner" (p. 1).
Date: July 1931
Creator: Léglise, Pierre
Partner: UNT Libraries Government Documents Department
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The Steady Spin

Description: With the object of further clarifying the problem of spinning, the equilibrium of the forces and moments acting on an airplane is discussed in light of the most recent test data. Convinced that in a spin the flight attitude by only small angles of yaw is more or less completely steady, the study is primarily devoted to an investigation of steady spin with no side slip. At small angles, wholly arbitrary and perfectly steady spins may be forced, depending on the type of control displacements. But… more
Date: July 1931
Creator: Fuchs, Richard & Schmidt, Wilhelm
Partner: UNT Libraries Government Documents Department
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Airplane Landing Gear

Description: This report presents an investigation of the design and construction of various types of landing gears. Some of the items discussed include: chassises, wheels, shock absorbers (rubber disk and rubber cord), as well as oleopneumatic shock absorbers. Various types of landing gears are also discussed such as the Messier, Bendix, Vickers, and Bleriot.
Date: July 1931
Creator: Maiorca, Salvatore
Partner: UNT Libraries Government Documents Department
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