Technical Report Archive & Image Library (TRAIL) - 212 Matching Results

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Airship Model Tests in the Variable Density Wind Tunnel

Description: This report presents the results of wind tunnel tests conducted to determine the aerodynamic characteristics of airship models. Eight Goodyear-Zeppelin airship models were tested in the original closed-throat tunnel. After the tunnel was rebuilt with an open throat a new model was tested, and one of the Goodyear-Zeppelin models was retested. The results indicate that much may be done to determine the drag of airships from evaluations of the pressure and skin-frictional drags on models tested at… more
Date: January 27, 1931
Creator: Abbott, Ira H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experiments With an Airfoil Model on Which the Boundary Layers Are Controlled Without the Use of Supplementary Equipment

Description: This report describes test made in the Variable Density Wind Tunnel of the NACA to determine the possibility of controlling the boundary layer on the upper surface of an airfoil by use of the low pressure existing near the leading edge. The low pressure was used to induce flow through slots in the upper surface of the wing. The tests showed that the angle of attack for maximum lift was increased at the expense of a reduction in the maximum lift coefficient and an increase in the drag coefficien… more
Date: April 1931
Creator: Abbott, Ira H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in the United States, 1929

Description: Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date: 1931
Creator: Adams, William W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Metal-Mine Accidents in the United States During the Calendar Year 1929

Description: Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date: 1931
Creator: Adams, William W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quarry Accidents in the United States During the Calendar Year 1929

Description: Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date: 1931
Creator: Adams, William W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in April, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths during the month of April, 1931. The number of fatalities and the causes are presented. This report includes tables and graphs.
Date: May 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in December, 1930

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths during December, 1930. The number of fatalities and the causes are presented. This report includes tables.
Date: January 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in February, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths during the month of February, 1931. The number of fatalities and the causes of each are presented. This report includes tables.
Date: March 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in January, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths during the month of January, 1931. The number of fatalities and their causes are presented. This report includes tables.
Date: February 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in March, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of March, 1931. The number of fatalities and their causes are listed. This report includes tables.
Date: April 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in May, 1931

Description: Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of May, 1931. The number of fatalities and their causes are presented. This report includes tables and graphs.
Date: June 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal-Mine Fatalities in November, 1930

Description: Report issued by the U.S. Bureau of Mines on the fatalities of coal miners in November, 1930. The common causes of death, and the location of the mines that the fatalities occurred in are listed. This report includes tables.
Date: December 1931
Creator: Adams, William Waugh & Chenoweth, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The aerodynamic characteristics of six commonly used Airfoils over a large range of positive and negative angles of attack

Description: From Summary: "This paper presents the results of tests of six commonly used airfoils: the CYH, the N-22, the C-72, the Boeing 106, and the Gottingen 398. The lifts, drags, and pitching moments of the airfoils were measured through a large range of positive and negative angles of attack. The tests were made in the variable density wind tunnel of the National Advisory Committee for Aeronautics at a large Boeing 106, and the Gottingen 398 airfoils, the negative maximum lift coefficients were foun… more
Date: November 1931
Creator: Anderson, Raymond F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The aerodynamic characteristics of three tapered airfoils tested in the variable density wind tunnel

Description: From Summary: "This report contains the lift, drag, and moment characteristics of tapered Clark Y, Gottingen 393, and USA 45 airfoils as obtained from tests made in the Variable Density Wind Tunnel of the NACA. The results are given at both low and high Reynolds Numbers to show scale effect and to provide data for use in airplane design."
Date: February 1931
Creator: Anderson, Raymond F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Investigation of Cotton for Parachute Cloth

Description: "This is a resume of the work of the Bureau of Standards on a cotton parachute cloth for use as a substitute for silk in the event of an emergency curtailing the supply. Cotton yarn of high strength in proportion to its weight and otherwise specially suitable for parachute cloth was developed. Cloth woven from this yarn in the bureau mill was equal or superior to parachute silk in strength and tear resistance, met the requirements with respect to air permeability, and weighed only a few tenths … more
Date: September 1931
Creator: Appel, William D. & Worner, R. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Certain Wing Shapes With Sections Varying Progressively Along the Span

Description: This investigation has a double object: 1) the calculation of the general characteristics of certain wings with progressively varying sections; 2) the determination of data furnishing, in certain cases, some information on the actual distribution of the external forces acting on a wing. We shall try to show certain advantages belonging to the few wing types of variable section which we shall study and that, even if the general aerodynamic coefficients of these wings are not often clearly superi… more
Date: April 1931
Creator: Arsandaux, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mammals of New Mexico

Description: Summary of the species of mammals native to New Mexico, including a map of the life zones, descriptions of the physiographic features, and lists of characteristic zone-marking plants, birds, mammals.
Date: December 1931
Creator: Bailey, Vernon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wind-Tunnel Tests on Airfoil Boundary Layer Control Using a Backward-Opening Slot (1931)

Description: "This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil. Boundary layer control was accomplished by means of a backward-opening slot in the upper surface of the hollow airfoil. Air was caused to flow through this slot by a pressure which was maintained inside the airfoil by a blower. Various slot locations, slot openings, and wing pressures were used" (p. 3).
Date: 1931
Creator: Bamber, Millard J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Miocene Flora From Grand Coulee, Washington

Description: From introduction: The fossil plants described in the present report were collected at the north end of Grand Coulee during the summer of 1927 by Messrs. T. A. Bonser, F. A. Roberts, and Walter Bruce, of Spokane, and F. W. McCann, of Coulee City. The locality is in the big bend of the Columbia River near the northern boundary of Grant County, Wash., about 85 miles west of the plant-bearing Latah sediments around Spokane. The outcrop in Grand Coulee is about the same distance east of the crest o… more
Date: 1931
Creator: Berry, Edward Wilber
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Factors Influencing Flow of Natural Gas Through High-Pressure Transmission Lines

Description: Report issued by the U.S. Bureau of Mines on the effects of different operating conditions on high-pressure natural gas pipelines. Analysis of past and current studies on natural gas transmission are presented. This report includes tables, graphs, and an illustration.
Date: December 1931
Creator: Berwald, W. B. & Johnson, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Jigging, Classification, Tabling, and Flotation Tests of Coals Presenting Difficult Washing Problems, with Particular Reference to Coals from Pierce County, Washington

Description: From Content and Arrangement of Report: "For the convenience of the reader the bulletin has been divided into two parts. Part I describes the investigation and summarizes the most important results. Part II gives the detailed data of the best of the washing tests by each process."
Date: 1931
Creator: Bird, B. M. & Marshall, S. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wrinkling Phenomena of Thin Flat Plates Subjected to Shear Stresses

Description: This report covers a series of tests on thin flat elastic strips restrained at two parallel edges and subjected to shear by conversely directed stresses. Theoretical treatments, particularly those of Lilly, Southwell and Skan, and Timoshenko are briefly outlined. The problem to be solved by these tests was to find out whether, and to what extent the conditions and assumptions upon which the calculations are based are complied with in the tests.
Date: January 1931
Creator: Bollenrath, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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