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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Collection: Technical Report Archive and Image Library
Use of Subaudible Noises for the Prediction of Rock Bursts

Use of Subaudible Noises for the Prediction of Rock Bursts

Date: July 1942
Creator: Obert, Leonard & Duvall, Wilbur
Description: Report issued by the U.S. Bureau of Mines on testing of sub-audible noises and accuracy of rock burst predictions. The history of this study, and the results of these investigations are presented. This report includes tables, graphs, illustrations, and diagrams.
Contributing Partner: UNT Libraries Government Documents Department
Use of variable-ratio geared tabs to improve stick-force characteristics in turning flight

Use of variable-ratio geared tabs to improve stick-force characteristics in turning flight

Date: October 1, 1945
Creator: Kleckner, Harold F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Use of water injection to decrease gasoline consumption in an aircraft engine cruising at high power

Use of water injection to decrease gasoline consumption in an aircraft engine cruising at high power

Date: August 1, 1944
Creator: White, H Jack
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Use of Wetting Agents in Reducing Dust Produced by Wet Drilling in Basalt

Use of Wetting Agents in Reducing Dust Produced by Wet Drilling in Basalt

Date: January 1943
Creator: Johnson, John A.
Description: Report issued by the U.S. Bureau of Mines on wet-drilling tests using two different wetting agents. Amounts are listed in the results. This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Utilization of Three Kids Manganese Ore in the Production of Electrolytic Manganese

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

Date: June 1945
Creator: Allen, Glenn L.; Jacobs, J. H.; Hunter, J. W. & Sillers, F., Jr.
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.
Contributing Partner: UNT Libraries Government Documents Department
Vapor-Pressure Chart for Volatile Hydrocarbons

Vapor-Pressure Chart for Volatile Hydrocarbons

Date: August 1942
Creator: Smith, R. Vincent
Description: Report issued by the U.S. Bureau of Mines discussing the construction of a vapor-pressure chart. A description of the vapor-pressure chart is presented. This report includes illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Variation in Velocity Profile with Change in Surface Roughness of Boundary

Variation in Velocity Profile with Change in Surface Roughness of Boundary

Date: September 1, 1940
Creator: Jacobs, W
Description: The present report deals with the variation of a turbulent velocity profile in flow from rough to smooth wall and vice versa. Expressions obtained for the shear-stress distribution with respect to the distance from the point of junction of the different roughnesses and from the wall distance, are utilized to ascertain the developing velocity distributions. Under simplified assumptions, the use of these formulas renders possible the integration of the motion equations for the shear stress. This calculation is carried out and compared with the experiments.
Contributing Partner: UNT Libraries Government Documents Department
Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 0 and -3 degree trim and with a 22 1/2 degree angle of dead rise

Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 0 and -3 degree trim and with a 22 1/2 degree angle of dead rise

Date: April 1, 1947
Creator: Batterson, Sidney A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 3 degree trim and with a 22 1/2 degree angle of dead rise

Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 3 degree trim and with a 22 1/2 degree angle of dead rise

Date: February 1, 1945
Creator: Batterson, Sidney A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 6 degrees and 9 degrees trim and a 22-1/2 degree angle of dead rise

Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 6 degrees and 9 degrees trim and a 22-1/2 degree angle of dead rise

Date: February 1, 1946
Creator: Stewart, Thelma
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 12 degree trim and with a 22-1/2 degree angle of dead rise

Variation of hydrodynamic impact loads with flight-path angle for a prismatic float at 12 degree trim and with a 22-1/2 degree angle of dead rise

Date: February 1, 1946
Creator: Batterson, Sidney A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Variation of peak pitching-moment coefficients for six airfoils as affected by compressibility

Variation of peak pitching-moment coefficients for six airfoils as affected by compressibility

Date: October 1, 1944
Creator: Cleary, Harold E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Variation of properties throughout cross section of two extruded shapes

Variation of properties throughout cross section of two extruded shapes

Date: September 1, 1941
Creator: Howell, F M
Description: Tensile and compressive properties were determined of specimens cut from the fins and the main bodies of two different extruded shapes of 24S-T aluminum alloy. The specimens from the fins as compared with those from the main body of the section showed: tensile strengths from 5000 to 10,000 pounds per square inch lower; tensile yield strengths and compressive yield strengths 4000 to 9000 pounds per square inch lower. The compressive yield strength values for any given location in the cross sections were about 1000 to 6000 pounds per square inch lower than the tensile strength values for the same location.
Contributing Partner: UNT Libraries Government Documents Department
Variation with Mach Number of Static and Total Pressures Through Various Screens

Variation with Mach Number of Static and Total Pressures Through Various Screens

Date: February 1, 1946
Creator: Adler, Alfred A
Description: Tests were conducted in the Langley 24-inch highspeed tunnel to ascertain the static-pressure and total-pressure losses through screens ranging in mesh from 3 to 12 wires per inch and in wire diameter from 0.023 to 0.041 inch. Data were obtained from a Mach number of approximately 0.20 up to the maximum (choking) Mach number obtainable for each screen. The results of this investigation indicate that the pressure losses increase with increasing Mach number until the choking Mach number, which can be computed, is reached. Since choking imposes a restriction on the mass rate of flow and maximum losses are incurred at this condition, great care must be taken in selecting the screen mesh and wire dimmeter for an installation so that the choking Mach number is.
Contributing Partner: UNT Libraries Government Documents Department
Variations in Oxygen Condition Between Individual Cartridges and Between Cases of Permissible Explosives

Variations in Oxygen Condition Between Individual Cartridges and Between Cases of Permissible Explosives

Date: June 1942
Creator: Rowles, A. P. & Denues, A. R. T.
Description: Report issued by the U.S. Bureau of Mines on the differing conditions of oxygen in explosives. Results from explosives samples with oxygen variations are presented. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Velocity distribution on wing sections of arbitrary shape in compressible potential flow I : symmetric flows obeying the simplified density-speed relation

Velocity distribution on wing sections of arbitrary shape in compressible potential flow I : symmetric flows obeying the simplified density-speed relation

Date: April 1, 1946
Creator: Bers, Lipman
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Velocity distribution on wing sections of arbitrary shape in compressible potential flow II : subsonic symmetric adiabatic flows

Velocity distribution on wing sections of arbitrary shape in compressible potential flow II : subsonic symmetric adiabatic flows

Date: June 1, 1946
Creator: Bers, Lipman
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Velocity distributions on two-dimensional wing-duct inlets by conformal mapping

Velocity distributions on two-dimensional wing-duct inlets by conformal mapping

Date: January 1, 1948
Creator: Perl, W & Moses, H E
Description: The conformal-mapping method of the Cartesian mapping function is applied to the determination of the velocity distribution on arbitrary two-dimensional duct-inlet shapes such as are used in wing installations. An idealized form of the actual wing-duct inlet is analyzed. The effects of leading edge stagger, inlet-velocity ratio, and section lift coefficients on the velocity distribution are included in the analysis. Numerical examples are given and, in part, compared with experimental data.
Contributing Partner: UNT Libraries Government Documents Department
Velocity gained and altitude lost in recoveries from inclined flight paths

Velocity gained and altitude lost in recoveries from inclined flight paths

Date: October 1, 1941
Creator: Pearson, H A & Garvin, J B
Description: A series of charts is given showing the variation of the velocity gained and the altitude lost in dive pullouts with the initial indicated air speed and the dive angle. The effects of the maximum load factor, the drag parameter K, the initial altitude, and the type of recovery on the velocity gained and the altitude lost are also considered. The results were obtained from a step-by-step solution of the equations of motion in which mean values of the air density and the airplane drag coefficient were used. The load-factor variation with time is arbitrarily specified in various ways to simulate pull-out procedures, some of which might be encountered in flight.
Contributing Partner: UNT Libraries Government Documents Department
Venturi Tube with Varying Mass Flow

Venturi Tube with Varying Mass Flow

Date: March 1, 1948
Creator: Regenscheit, B.
Description: Measurements on three tubes with flow regulated by suction at the trainling edge of the tube are described. It was possible to vary the mass of air flowing through the tube over a large range. Such tubes could be used for shrouded propellers.
Contributing Partner: UNT Libraries Government Documents Department
Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Date: November 3, 1949
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration of turbine blades in a turbojet engine during operation

Vibration of turbine blades in a turbojet engine during operation

Date: April 22, 1948
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Date: November 1, 1944
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Date: January 31, 1949
Creator: Meyer, Andre J , Jr & Calvert, Howard F
Description: None
Contributing Partner: UNT Libraries Government Documents Department