Technical Report Archive and Image Library (TRAIL) - 193 Matching Results

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Spontaneous combustion of hydrogen

Description: It is shown by the author's experiments that hydrogen which escapes to the atmosphere through openings in the system may burn spontaneously if it contains dust. Purely thermal reasoning can not account for the combustion. It seems to be rather an electrical ignition. In order to determine whether the cause of the spontaneous ignition was thermo-chemical, thermo-mechanical, or thermo-electrical, the experiments in this paper were performed.
Date: March 4, 1922
Creator: Pothmann, PH & Nusselt, Wilhelm
Partner: UNT Libraries Government Documents Department

Oil-Shale: An Historical, Technical, and Economic Study

Description: Report issued by the U.S. Bureau of Mines discussing studies conducted on the development of the oil-shale industry from a historical, technical, and economic perspective. Results of the studies are presented. This report includes tables, illustrations, and photographs.
Date: July 1922
Creator: Gavin, Martin J.
Partner: UNT Libraries Government Documents Department

Electric Brass Furnace Practice

Description: Report issued by the Bureau of Mines discussing the use of electric furnaces for melting brass, and other nonferrous alloys. Monetary benefits, health benefits, and other advantages of using electric furnaces are presented. Descriptions of furnaces and their operational methods are also presented. This report includes tables, illustrations, and photographs.
Date: 1922
Creator: Gillett, H. W. & Mack, E. L.
Partner: UNT Libraries Government Documents Department

Natural Gas Manual for the Home

Description: Report issued by the Bureau of Mines discussing a manual written for individuals who use natural gas in the home. As stated in the introduction, "its purpose is to tell about the supply, production, and distribution of natural gas, so that the necessity for preventing waste will be better understood" (p. 1). This report includes a map, illustrations, and photographs.
Date: 1922
Creator: Cattell, R. A.
Partner: UNT Libraries Government Documents Department

Preparation and Uses of Tar and its Simple Crude Derivatives

Description: Technical paper issued by the Bureau of Mines over studies of coal tars. As stated in the introduction, "this paper discusses the uses to which some of the various tars are put and shows briefly the usual methods of working up tar into some of its simple or easily prepared derivatives, for which a market can generally be found" (p. 5). This paper includes tables, illustrations, and photographs.
Date: February 1922
Creator: Odell, W. W.
Partner: UNT Libraries Government Documents Department

Recovery of Gasoline From Uncondensed Still Vapors

Description: Report issued by the U.S. Bureau of Mines on the possibilities of increasing fuel production from crude oil. Methods of recovering oil that is lost by remaining uncondensed are presented. This report includes tables, graphs, and illustrations.
Date: April 1922
Creator: Dow, Donald B.
Partner: UNT Libraries Government Documents Department

Drilling and Dustiness of Metal-Mine Air

Description: Report issued by the U.S. Bureau of Mines on the air quality in metal-mines after using wet drills. Dust samples are collected and compared to samples collected from similar metal-mines in South Africa and Australia. This report includes tables.
Date: March 1922
Creator: Harrington, D.
Partner: UNT Libraries Government Documents Department

Electric Brass Furnace Practice

Description: Report discussing 1) the pertinent information available on what electric furnaces can do to assist prospective users in selecting a furnace that fits their requirements and 2) the gradual evolution of the present commercial types of electric furnaces. Also discusses some of the fundamental principles in the design, construction, and operation of electric furnaces.
Date: July 1922
Creator: Gillett, H. W. & Mack, E. L.
Partner: UNT Libraries Government Documents Department

Analysis of stresses in German airplanes

Description: This report contains an account of the origin of the views and fundamental principles underlying the construction of German airplanes during the war. The report contains a detailed discussion of the aerodynamic principles and their use in determining the strength of airplanes, the analysis of the strength qualities of materials and in the construction, the calculated strength of air flows and a description of tests made in determining the strength of airplanes.
Date: 1922
Creator: Hoff, Wilhelm
Partner: UNT Libraries Government Documents Department

Air forces, moments and damping on model of fleet airship Shenandoah

Description: From Introduction: "To furnish data for the design of the fleet airship Shenandoah, a model was made and tested in the 8 by 8 foot wind tunnel for wind forces, moments, and damping, under conditions described in this report. The results are given for air of standard density. P=0.00237 slugs per cubic foot with vl/v correction, and with but a brief discussion of the aerodynamic design features of the airship."
Date: 1922~
Creator: Zahm, A F; Smith, R H & Louden, F A
Partner: UNT Libraries Government Documents Department

The glider

Description: This report presents the results of testing on a glider designed and built by the College Aviation Group. The design and construction were based on the following principles: 1) the glider will be made to descend as slowly as possible; 2) rigidity and resistance were arranged to meet the conditions of varied loads; 3) construction is as simple as possible; 4) and great ease in assembling and dismounting have been sought.
Date: January 1, 1922
Creator: Blume, W
Partner: UNT Libraries Government Documents Department

Location of center of pressure of airplane wings

Description: Data obtained in the Gottingen Aerodynamic Laboratory give considerable detail on the resulting air force moment exerted on various wing sections at different angles of attack. The Gottingen data can serve well to test the hydrodynamic theory, which (on the assumption of uniform motion and hence of infinitely wide wings) renders it possible to compute this moment as a function of the angle of attack. The Gottigen data can well serve to test the theory and it may be noted that experiment and computation compare favorably.
Date: November 1, 1922
Creator: MISES
Partner: UNT Libraries Government Documents Department

Commercial airplanes and seaplanes : thick wings or thin wings - all metal or mixed construction

Description: In this report we will consider, as the dominating characteristic, either the load carried, the speed, the radius of action, the fuel consumption, the activity of transport, or, lastly, the qualities of comfort and safety. The first four factors determine the theoretical efficiency, while the others determine its practical efficiency.
Date: December 1, 1922
Creator: POINT
Partner: UNT Libraries Government Documents Department

Comparison of nonrigid and semirigid airships

Description: One of the main subjects of airship science consists in establishing cooperation between two vertical forces, the buoyancy of the air and the attraction of gravity. The mechanism for establishing this cooperation must have the minimum weight and offer the minimum head resistance. Starting with this principle, let us consider what improvements can be made in the present type of non-rigid airships.
Date: November 1, 1922
Creator: Stapfer,
Partner: UNT Libraries Government Documents Department