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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1942
 Collection: Technical Report Archive and Image Library
Coal-Mine Accidents in the United States, 1939

Coal-Mine Accidents in the United States, 1939

Date: 1942
Creator: Adams, William W.; Geyer, L. E. & Parry, M. G.
Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents 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.
Contributing Partner: UNT Libraries Government Documents Department
Coal-Mine Accidents in the United States, 1940

Coal-Mine Accidents in the United States, 1940

Date: 1942
Creator: Adams, William W.; Geyer, L. E. & Parry, M. G.
Description: Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents 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.
Contributing Partner: UNT Libraries Government Documents Department
Investigations of Permissible Electric Mine Lamps, 1930-40

Investigations of Permissible Electric Mine Lamps, 1930-40

Date: 1942
Creator: Ilsley, L. C.; Hooker, A. B. & Roadstrum, W. H.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Seismic Effects of Quarry Blasting

Seismic Effects of Quarry Blasting

Date: 1942
Creator: Thoenen, J. R. & Windes, S. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1940 (Excluding Coal Mines)

Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1940 (Excluding Coal Mines)

Date: 1942
Creator: Adams, W. W. & Kolhos, M. E.
Description: Report published by the U.S. Bureau of Mines regarding accidents at mines located in the United States for all operations except coal mines. The report includes statistics about the number and kinds of accidents as well as information about the mining operations (i.e., number of persons employed, average amount of work performed per person, etc.).
Contributing Partner: UNT Libraries Government Documents Department
Plastic and Swelling Properties of Bituminous Coking Coals

Plastic and Swelling Properties of Bituminous Coking Coals

Date: 1942
Creator: Brewer, R. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Quarry Accidents in the United States During the Calendar Year 1940

Quarry Accidents in the United States During the Calendar Year 1940

Date: 1942
Creator: Adams, William & Wrenn, Virginia E.
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.).
Contributing Partner: UNT Libraries Government Documents Department
Sponge Chromium

Sponge Chromium

Date: 1942
Creator: Maier, C. G.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Typical Analyses of Coals of the United States

Typical Analyses of Coals of the United States

Date: 1942
Creator: Fieldner, A. C.; Rice, W. E. & Moran, H. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
United States Earthquakes 1942

United States Earthquakes 1942

Date: 1942
Creator: unknown
Description: Report discussing earthquake activity in the United States during 1942. The report is broken down by regions and has sections for specific earthquakes.
Contributing Partner: UNT Libraries Government Documents Department
A profile-drag investigation in flight on an experimental fighter-type airplane the North American XP-51

A profile-drag investigation in flight on an experimental fighter-type airplane the North American XP-51

Date: January 1, 1942
Creator: Zalovcik, J. A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of a heated low-drag airfoil

Tests of a heated low-drag airfoil

Date: December 1, 1942
Creator: Frick, C. W., Jr. & Mccullough, G. B.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Experimental investigation of a new type of low-drag wing-nacelle combination

Experimental investigation of a new type of low-drag wing-nacelle combination

Date: July 1, 1942
Creator: Allen, H. J. & Frick, C. W., Jr.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Preliminary Low-Drag-Airfoil and Flap Data from Tests at Large Reynolds Numbers and Low Turbulence

Preliminary Low-Drag-Airfoil and Flap Data from Tests at Large Reynolds Numbers and Low Turbulence

Date: March 1, 1942
Creator: Abbott, I. H.; Davidson, M. & Jacobs, E. N.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Results of landing tests of various airplanes

Results of landing tests of various airplanes

Date: September 1, 1942
Creator: Hootman, J A & Jones, A R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A comparison of the results from general tank tests of 1/6- and 1/12-full-size models of the British Singapore IIC flying boat

A comparison of the results from general tank tests of 1/6- and 1/12-full-size models of the British Singapore IIC flying boat

Date: August 1, 1942
Creator: Truscott, Starr & Dawson, John R
Description: A 1/6-full-size model of the hull of the British Singapore IIC flying boat was tested in the NACA tank. The results are given in the form of charts and are compared with the results of previous tests made in the NACA tank of a 1/12-full-size model, published in NACA T.N. No. 580, and with the results of tests made in the British R.A.E. tank of another 1/6-full-size model of the same hull. When the data from the tests of the 1/6- and 1/12-full-size models were compared on the basis of Froude's law of comparison, differences were found. This fact supported the belief that the small scale of the model and the use of a model that was too small to suit the equipment of the NACA tank had caused the results of the tests of the 1/12-full-size model to be less reliable than the results of the tests of the 1/6-full-size model. The results of the tests of the two models agreed sufficiently well to show that test of a small model, if made meticulously and with suitable equipment, may give useable results, but that a larger model should be used whenever feasible. The results of the NACA tests of ...
Contributing Partner: UNT Libraries Government Documents Department
A study of general instability of box beams with truss-type ribs

A study of general instability of box beams with truss-type ribs

Date: November 1, 1942
Creator: Lundquist, Eugene E & Schwartz, Edward B
Description: The design of truss-type ribs for box beams is theoretically treated with regard to the function of the ribs in stabilizing the compression flange. The theory is applied to a design problem, and the results of this application are presented and discussed in relation to the general problem of rib design. The results of some tests made as a part of this general study are presented in an appendix.
Contributing Partner: UNT Libraries Government Documents Department
The critical compression load for a universal testing machine when the specimen is loaded through knife edges

The critical compression load for a universal testing machine when the specimen is loaded through knife edges

Date: September 1, 1942
Creator: Lundquist, Eugene E & Schwartz, Edward B
Description: The results of a theoretical and experimental investigation to determine the critical compression load for a universal testing machine are presented for specimens loaded through knife edges. The critical load for the testing machine is the load at which one of the loading heads becomes laterally instable in relation to the other. For very short specimens the critical load was found to be less than the rated capacity given by the manufacturer for the machine. A load-length diagram is proposed for defining the safe limits of the test region for the machine. Although this report is particularly concerned with a universal testing machine of a certain type, the basic theory which led to the derivation of the general equation for the critical load, P (sub cr) = alpha L can be applied to any testing machine operated in compression where the specimen is loaded through knife edges. In this equation, L is the length of the specimen between knife edges and alpha is the force necessary to displace the upper end of the specimen unit horizontal distance relative to the lower end of the specimen in a direction normal to the knife edges through which the specimen is loaded.
Contributing Partner: UNT Libraries Government Documents Department
A method for determining the camber and twist of a surface to support a given distribution of lift

A method for determining the camber and twist of a surface to support a given distribution of lift

Date: August 1, 1942
Creator: Cohen, Doris
Description: A graphical method is described for finding the shape (camber and twist) of an airfoil having an arbitrary distribution of lift. The method consists in replacing the lifting surface and its wake with an equivalent arrangement of vortices and in finding the associated vertical velocities. By a division of the vortex pattern into circular strips concentric about the downwash point instead of into the usual rectangular strips, the lifting surface is reduced for each downwash point to an equivalent loaded line for which the induced velocity is readily computed. The ratio of the vertical velocity to the stream velocity is the slope of the surface in the free-stream direction. As an illustration, the shape of the wing consistent with the pressure distribution derived from the two-dimensional theories is found for two wings: a straight elliptical wing and one with 30 degree sweepback. Application of the method to solve the reverse problem - finding the lift distribution over a given surface - is briefly discussed.
Contributing Partner: UNT Libraries Government Documents Department
Strength tests of thin-walled elliptic duralumin cylinders in pure bending and in combined pure bending and torsion

Strength tests of thin-walled elliptic duralumin cylinders in pure bending and in combined pure bending and torsion

Date: June 1, 1942
Creator: Lundquist, Eugene E & Stowell, Elbridge Z
Description: An analysis is presented of the results of tests made by the Massachusetts Institute of Technology and by the National Advisory Committee for Aeronautics on an investigation of the strength of thin-walled circular and elliptic cylinders in pure bending and in combined torsion and bending. In each of the loading conditions, the bending moments were applied in the plane of the major axis of the ellipse.
Contributing Partner: UNT Libraries Government Documents Department
The effect of valve cooling upon maximum permissible engine output as limited by knock

The effect of valve cooling upon maximum permissible engine output as limited by knock

Date: September 1, 1942
Creator: Munger, Maurice; Wilsted, H D & Mulcahy, B A
Description: A Wright GR-1820-G200 cylinder was tested over a wide range of fuel-air ratios at maximum permissible power output as limited by knock with three different degrees of valve cooling. The valves used were stock valves (solid inlet valve and hollow sodium-cooled exhaust valve), hollow valves with no coolant, and hollow valves with flowing water as a coolant. Curves showing the variation in maximum permissible values of inlet-air pressure, indicated mean effective pressure, cylinder charge, and indicated specific fuel consumption with change in fuel-air ratio and valve cooling are shown. The use of valves cooled by a stream of water passing through their hollow interiors permitted indicated mean effective pressures 10 percent higher than the mean effective pressures permissible with stock valves when the engine was operated with fuel-air ratios from 0.055 to 0.065. Operation of the engine with lean mixtures with uncooled hollow valves resulted in power output below the output obtained with the stock valves. The data show an increase in maximum permissible indicated mean effective pressure due to cooling the valves, which averages only 2.1 percent with fuel-air ratios from 0.075 to 0.105.
Contributing Partner: UNT Libraries Government Documents Department
Normal-pressure tests of rectangular plates

Normal-pressure tests of rectangular plates

Date: June 1, 1942
Creator: Ramberg, Walter; Mcpherson, Albert E & Levy, Samuel
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Rise in temperature of the charge in its passage through the inlet valve and port of an air-cooled aircraft engine cylinder

Rise in temperature of the charge in its passage through the inlet valve and port of an air-cooled aircraft engine cylinder

Date: January 1, 1942
Creator: Forbes, J E & Taylor, E S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The direct-stress fatigue strength of 17S-T aluminum alloy throughout the range from 1/2 to 500,000,000 cycles of stress

The direct-stress fatigue strength of 17S-T aluminum alloy throughout the range from 1/2 to 500,000,000 cycles of stress

Date: September 1, 1942
Creator: Hartmann, E C & Stickley, G W
Description: Fatigue-test were conducted on six specimens made from 3/4-inch-diameter 17S-T rolled-and-drawn rod for the purpose of obtaining additional data on the fatigue life of the material at stresses up to the static strength. The specimens were tested in direct tension using a stress range from zero to a maximum in tension. A static testing machine was used to apply repeated loads in the case of the first three specimens; the other three specimens were tested in a direct tension-compression fatigue machine. The direct-stress fatigue curve obtained for the material indicates that, in the range of stresses above about two-thirds the tensile strength, the fatigue strength is higher than might be expected by simply extrapolating the ordinary curve of stress plotted against the number of cycles determined at lower stresses.
Contributing Partner: UNT Libraries Government Documents Department
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