UNT Libraries Government Documents Department - 210 Matching Results

Search Results

prev Results: 73 - 96 next
open access

Experimental Investigations Concerning the Limits of Detonation in Gaseous Mixtures: Part 2

Description: Memorandum presenting an investigation concerning the limits of detonation in gaseous mixtures. In regards to the results, by progressive dilution of the explosive, the course of the chemical reaction becomes slower and slower until finally the transformation within the reaction zone becomes so slow that it is not there completed.
Date: February 1930
Creator: Wendlandt, Rudolf
Item Type: Refine your search to only Report
open access

Experimental Research on the Friction of Pivots

Description: In horology the friction between solids is of the greatest importance; one limited, however, to the application of the laws of Coulomb which, do not at all correspond with reality. This report presents a review of the subject and some general conclusions. The choice of lubricant is discussed as well as the pressure between frictional surfaces. The gears in a watch are used extensively as examples.
Date: May 1930
Creator: Jaquerod, A.; Defossez, L. & Mügeli, H
Item Type: Refine your search to only Report
open access

Experiments with a model water tunnel

Description: This report describes a model water tunnel built in 1928 by the NACA to investigate the possibility of using water tunnels for aerodynamic investigations at large scales. The model tunnel is similar to an open-throat wind tunnel, but uses water for the working fluid.
Date: December 1930
Creator: Jacobs, Eastman N. & Abbott, Ira H.
Item Type: Refine your search to only Report
open access

An Extended Theory of Thin Airfoils and Its Application to the Biplane Problem

Description: "The report presents a new treatment, due essentially to von Karman, of the problem of the thin airfoil. The standard formulae for the angle of zero lift and zero moment are first developed and the analysis is then extended to give the effect of disturbing or interference velocities, corresponding to an arbitrary potential flow, which are superimposed on a normal rectilinear flow over the airfoil. An approximate method is presented for obtaining the velocities induced by a 2-dimensional airfoil… more
Date: March 15, 1930
Creator: Millikan, Clark B.
Item Type: Refine your search to only Report
open access

Flight tests on U.S.S. Los Angeles. Part 2: stress and strength determination

Description: From Summary: "The tests described in this report furnished data on the actual aerodynamic forces, and the resulting stresses and bending moments in the hull of the U. S. S. "Los Angeles" during as severe still-air maneuvers as the airship would normally be subjected to, and in straight flight during as rough air as is likely to occur in service, short of squall or storm conditions. The maximum stresses were found to be within the limits provided for in accepted practice in airship design. Norm… more
Date: January 1930
Creator: Burgess, C. P.
Item Type: Refine your search to only Report
open access

Fuel Vapor Pressures and the Relation of Vapor Pressure to the Preparation of Fuel for Combustion in Fuel Injection Engines

Description: "This investigation on the vapor pressure of fuels was conducted in connection with the general research on combustion in fuel injection engines. The purpose of the investigation was to study the effects of high temperatures such as exist during the first stages of injection on the vapor pressures of several fuels and certain fuel mixtures, and the relation of these vapor pressures to the preparation of the fuel for combustion in high-speed fuel injection engines" (p. 385).
Date: 1930
Creator: Joachim, William F. & Rothrock, A. M.
Item Type: Refine your search to only Report
open access

Full Scale Drag Tests on Various Parts of Fairchild (FC-2W2) Cabin Monoplane

Description: "The drag due to the various parts of a Fairchild (FC-2W2) cabin monoplane was measured at air speeds varying from 50 to 100 m.p.h., in the Twenty-Foot Propeller Research Tunnel of the National Advisory Committee for Aeronautics. It was found that the largest drag was due to the radial air-cooled engine. The measured drag due to the landing gear was also large, being about 4/5 of that due to the engine" (p. 1).
Date: May 1930
Creator: Herrnstein, William H., Jr.
Item Type: Refine your search to only Report
open access

Full-scale tests of metal propellers at high tip speeds

Description: This report describes tests of 10 full-scale metal propellers of several thickness ratios at various tip speeds up to 1,350 feet per second. The results indicate no loss of efficiency up to tip speeds of approximately 1,000 feet per second. Above this tip speed the loss is at a rate of about 10 per cent per 100 feet per second increase relative to the efficiency at the lower speeds for propellers of pitch diameter ratios 0.3 to 0.4. Propellers having sections of small thickness ratio can be run… more
Date: November 5, 1930
Creator: Wood, Donald H.
Item Type: Refine your search to only Report
open access

Gas-Lift Method of Flowing Oil Wells: (California Practice)

Description: From Introduction: "In this report the author has presented data of actual gas-lift operations in the oil fields of California. Wherever theoretical hypotheses and conclusions are given an attempt has been made to support them by field data gathered during consultation with engineers and operators. The impossibility of drawing conclusions that will apply to all wells or even to one well throughout its life is appreciated by everyone who has studied the subject, and the reader is cautioned not t… more
Date: 1930
Creator: Miller, H. C.
Item Type: Refine your search to only Report
open access

The Gaseous Explosive Reaction: The Effect of Pressure on the Rate of Propagation of the Reaction Zone and Upon the Rate of Molecular Transformation

Description: This study of gaseous explosive reaction has brought out a number of important fundamental characteristics of the explosive reaction indicating that the basal processes of the transformation are much simpler and corresponds more closely to the general laws and principles of ordinary transformations than is usually supposed. The report calls attention to the point that the rate of molecular transformation within the zone was found in all cases to be proportional to pressure, that the transformat… more
Date: June 14, 1930
Creator: Stevens, F. W.
Item Type: Refine your search to only Report
open access

Geologic History of the Yosemite Valley

Description: The principal result of the investigations upon which this report is based is the determination within narrow limits of the preglacial depth of the Yosemite Valley and of other facts concerning its preglacial development which permit fairly definite estimates of the proportionate shares of work performed by stream and by glacier. The investigations comprise a detailed survey of the glacial and geomorphologic features of the Yosemite region and an equally intensive study of its rock formations, … more
Date: 1930
Creator: Matthes, François E.
Item Type: Refine your search to only Report
open access

Geology and Coal Resources of the Meeker Quadrangle, Moffat and Rio Blanco Counties, Colorado

Description: From introduction: The investigations on which the greater part of this report is based were carried on by E. T. Hancock, the senior author, during the summer of 1911. They were undertaken by the United States Geological Survey under a comprehensive plan for collecting information about the undeveloped fuel resources of the Western States, both as a step toward the conservation of the coal resources of the United States and as a means of supplying the demand for information concerning the many … more
Date: 1930
Creator: Hancock, E. T. & Eby, J. Brian
Item Type: Refine your search to only Report
open access

Geology and Oil Resources Along the Southern Border of San Joaquin Valley, California

Description: From abstract: The region described in this report includes a foothill belt of the San Emigdio and Tehachapi Mountains along the southern border of San Joaquin Valley. The belt displays portions of the rugged granitic cores of the mountains and also rocks of Eocene, Oligocene, Miocene, Pliocene, and Pleistocene age. Although there is thus a complete representation of the geologic series from the Eocene to the Pleistocene, some portions of the different series are wanting because of major faults… more
Date: 1930
Creator: Hoots, H. W.
Item Type: Refine your search to only Report
open access

Geology of the Eastern Part of the Santa Monica Mountains, Los Angeles County, California

Description: From abstract: The Santa Monica Mountains lie only a few miles northwest of the city of Los Angeles and comprise one of the prominent structural features that adjoin the Los Angeles Basin, one of the most prolific oil-producing districts of California. Even though the eastern part of these mountains may yield no oil, information concerning the rock types, structural character, and detailed geologic history of this area should be of value to petroleum geologists. The area described in this repor… more
Date: 1930
Creator: Hoots, H. W.
Item Type: Refine your search to only Report
open access

Greensand Bibliography to 1930 (Annotated): with a Chapter on Zeolite Water Softeners

Description: From Introduction: "The references given herein to the literature of greensand or glauconite are believed to be complete up to about the end of 1929. The aim in this bibliography has been to include with each important reference a short synopsis, generally checked against the original article. These synopses are believed to be sufficiently complete to present a general view of the original article, and in many items specific parts of the article are included."
Date: 1930
Creator: Shreve, R. Norris
Item Type: Refine your search to only Report
Back to Top of Screen