562 Matching Results

Search Results

Results: 1 - 24 next
open access

Experiments on Drag of Revolving Disks, Cylinders and Streamline Rods at High Speeds

Description: Report presenting an experimental investigation concerned primarily with the extension of test data on the drag of revolving disks, cylinders, and streamline rods to high Mach numbers and Reynolds numbers. The tests generally confirm earlier theories and add in some new results. One of the primary findings of interest is that skin friction does not depend on Mach number.
Date: June 1944
Creator: Theodorsen, Theodore & Regier, Arthur
Partner: UNT Libraries Government Documents Department
open access

Flight Tests of Modifications to Improve the Aileron Control Characteristics of a North American XP-51 Airplane (AC No. 41-38)

Description: Investigations were undertaken to improve the ailerons of a P-51 fighter so as to obtain greater effectiveness without increasing the stick forces. Modifications consisted of increasing the deflection range of the aileron to 70 percent and changing the original concave section to a thick section with beveled trailing edge. Results of the modified ailerons showed an increase in effectiveness over the original aileron of 70 percent at low speed and 55 percent at high speeds.
Date: June 1942
Creator: White, M. D. & Hoover, Herbert H.
Partner: UNT Libraries Government Documents Department
open access

Flight Studies of the Horizontal-Tail Loads Experienced by a Fighter Airplane in Abrupt Maneuvers

Description: Report presenting flight measurements made on a modern pursuit airplane to determine the approximate magnitude of the horizontal tail loads in accelerated flight. Pressures at a few points were used as an index of the tail loads by correlating these pressures with complete pressure-distribution data obtained in the NACA full-scale tunnel.
Date: June 1944
Creator: Flight Research Maneuvers Section
Partner: UNT Libraries Government Documents Department
open access

A general representation for axial-flow fans and turbines

Description: From Summary: "A general representation of fan and turbine arrangements on a single classification chart is presented which is made possible by a particular definition of the stage of an axial-flow fan or turbine. Several unconventional fan and turbine arrangements are indicated and the applications of these arrangements are discussed."
Date: June 1945
Creator: Perl, W. & Tucker, M.
Partner: UNT Libraries Government Documents Department
open access

Thermodynamic Design of Double-Panel, Air-Heated Windshields for Ice Prevention

Description: Report details the development of design equations for double-panel, air-heated windshields with ice prevention properties. The application of the equations and suggestions for experimental flight testing are described.
Date: June 1943
Creator: Kushnick, Jerome L.
Partner: UNT Libraries Government Documents Department
open access

Two-Dimensional Irrotational Transonic Flows of a Compressible Fluid

Description: The methods of NACA TN No. 995 have been slightly modified and extended in include flows with circulation by considering the alteration of the singularities of the incompressible solution due to the presence of the hypergeometric functions in the analytic continuation of the solution. It was found that for finite Mach numbers the only case in which the nature of the singularity can remain unchanged is for a ratio of specific heats equal to -1. From a study of two particular flows it seems that … more
Date: June 1948
Creator: Kuo, Yung-Huai
Partner: UNT Libraries Government Documents Department
open access

Wind-Tunnel Tests of the 1/8-Scale Powered Model of the Curtiss XBTC-2 Airplane 1: Preliminary Investigation of Longitudinal Stability

Description: Report presenting a series of wind-tunnel tests made in the 7- by 10-foot tunnel of the Curtiss XBTC-2 model with power. The object of the tests was to determine and to improve, as necessary, the complete aerodynamic characteristics of the model. The report includes the results of the longitudinal stability investigation of the original model along with results from tests of various modifications.
Date: June 1944
Creator: Weil, Joseph & Wells, Evalyn G.
Partner: UNT Libraries Government Documents Department
open access

Effects of Some Present-Day Airplane Design Trends on Requirements for Lateral Stability

Description: Note presenting computations made to determine the effects of some airplane design trends on the fin area and the dihedral angle required for lateral stability. The specific factors studied were wing loading, moments of inertia in roll and yaw, wing chord, and tail length. The results of the computations are presented in the form of diagrams of variations of fin area with dihedral angle for neutral stability.
Date: June 1941
Creator: Bamber, Millard J.
Partner: UNT Libraries Government Documents Department
open access

Method of Assaying Oil Shale by a Modified Fischer Retort: Revision of R. I. 3977

Description: Report issued by the Bureau of Mines over studies of the processes used in oil-shale assay methods. Updated methods are provided from a previous report on the same topic. This report includes tables, graphs, and illustrations.
Date: June 1949
Creator: Stanfield, K. E. & Frost, I. C.
Partner: UNT Libraries Government Documents Department
open access

Petroleum-Engineering Study of Atlanta Oil Field, Columbia County, Arkansas

Description: Report issued by the Bureau of Mines over petroleum-engineering studies conducted at the Atlanta oil field. The methods used for the study are presented and discussed. This report includes tables, maps, illustrations, and photographs.
Date: June 1949
Creator: Riggs, C. H.
Partner: UNT Libraries Government Documents Department
open access

Investigation of Sublette Ridge Vanadium Deposit, Lincoln County, Wyoming

Description: Report issued by the Bureau of Mines over studies conducted on vanadium deposits in Lincoln County. As noted in the introduction, "the following report covers the history of the district, outlines the physical features and communications, mentions the property, and notes the ownership. The deposits and ore are described, and work performed by the Bureau of Mines is explained in detail" (p. 1). This report includes tables, and maps.
Date: June 1949
Creator: Allsman, Paul T.; Majors, Forest H.; Mahoney, Stanford R. & Young, W. A.
Partner: UNT Libraries Government Documents Department
open access

Diamond Drilling in the Metaline District, Pend Oreille County, Washington

Description: Report issued by the Bureau of Mines on exploration by diamond drilling in Pend Oreille County. Results of the exploration are presented. This report includes tables, maps, illustrations, and photographs.
Date: June 1949
Creator: Wimmler, Norman L. & Cole, W. B.
Partner: UNT Libraries Government Documents Department
open access

Magnetometer Surveys on Black Sands of the Oregon Coast

Description: Report issued by the U.S. Bureau of Mines on the magnetometer surveys conducted on the coastal region of Oregon. The methods, geology, and locations surveyed are presented. This report includes maps, graphs, and illustrations.
Date: June 1945
Creator: Stephenson, Edgar Lee
Partner: UNT Libraries Government Documents Department
open access

Utilization of Three Kids Manganese Ore in the Production of Electrolytic Manganese

Description: Report issued by the U.S. Bureau of Mines regarding specific manganese ore from Nevada and its use in electrolytic production. The development processes and methods are presented. This report includes tables, maps, illustrations, and photographs.
Date: June 1945
Creator: Allen, Glenn L.; Jacobs, J. H.; Hunter, J. W. & Sillers, F., Jr.
Partner: UNT Libraries Government Documents Department
open access

Use of Brine in a Kansas Field for Secondary Recovery of Oil

Description: Report issued by the U.S. Bureau of Mines on the use of oil field brine in secondary recovery methods. Characteristics of the brine, and methods used in recovery processes are presented. This report includes tables, graphs, maps, and illustrations.
Date: June 1941
Creator: Wilhelm, C. J.; Taylor, Sam S.; Holliman, W. C. & Owens, E. O.
Partner: UNT Libraries Government Documents Department
open access

Daisy Fluorite Mine: Rosiclare Lead and Fluorspar Mining Company, Hardin County, Illinois

Description: Report from the U.S. Bureau of Mines over the studies conducted on the Daisy mine and the Hillside mine in Hardin County, Illinois. Properties of the mines, and the types of mineral deposits found in each are presented. This report includes maps, and illustrations.
Date: June 1947
Creator: Muir, Neal M.
Partner: UNT Libraries Government Documents Department
open access

Beneficiation of Chromite Ores From Western United States

Description: Report issued by the U.S. Bureau of Mines on the sampling of chrome ore deposits in the western United States. Physical properties of the samples collected are presented. This report includes tables.
Date: June 1947
Creator: Batty, J. V.; Mitchell, T. F.; Havens, R. & Wells, R. R.
Partner: UNT Libraries Government Documents Department
open access

Lake Valley Manganese Deposits, Sierra County, New Mexico

Description: Report issued by the Bureau of Mines over the manganese deposits in Sierra County, New Mexico. Descriptions of the physicality, and characteristics of the manganese ore are presented. This report includes tables, maps, and illustrations.
Date: June 1947
Creator: Apell, G. A.; Hazen, Scott W. & Howe, E. G.
Partner: UNT Libraries Government Documents Department
open access

Briquetting Subbituminous Coal

Description: Report issued by the Bureau of Mines over briquetting of coal for development of more effective fuel. Materials, equipment, and processes are discussed. This report includes tables, illustrations, and photographs.
Date: June 1943
Creator: Parry, V. F. & Goodman, John B.
Partner: UNT Libraries Government Documents Department
open access

Experiments on the Effect of Atomic Electrons on the DecayConstant of Be7 II.

Description: A comparison of the decay constants of Be{sup 7} in beryllium oxide and in beryllium fluoride has given {lambda}{sub BeO}-{lambda}{sub BeF{sub 2}} = (+1.375 {+-} 0.053)10{sup -3}{lambda}{sub BeO} thus showing a definite effect of the chemical binding on the radioactive decay constant.
Date: June 15, 1949
Creator: Leininger, R. F.; Segre, E. & Wiegand, C.
Partner: UNT Libraries Government Documents Department
open access

Progress Report No. 62 June 1-15, 1948

Description: This paper reports on the following programs: (1) 184-inch Cyclotron Program; (2) 60-inch Cyclotron Program; (3) Synchrotron Program; (4) Linear Accelerator Program; (5) Experimental Physics; (6) Theoretical Physics; (7) Isotope Separation Program; (8) Chemistry; and (9) Medical Physics.
Date: June 30, 1948
Partner: UNT Libraries Government Documents Department
open access

Path of Carbon in Photosynthesis III

Description: Although the overall reaction of photosynthesis can be specified with some degree of certainty (CO{sub 2} + H{sub 2}O + light {yields} sugars + possibly other reduced substances), the intermediates through which the carbon passes during the course of this reduction have, until now, been largely a matter of conjecture. The availability of isotopic carbon, that is, a method of labeling the carbon dioxide, provides the possibility of some very direct experiments designed to recognize these interme… more
Date: June 1, 1948
Creator: Benson, A. A. & Calvin, M.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen