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13,985 Matching Results
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THE HEAT CAPACITY OF BERYLLIUM CARBIDE POWDER IN STAINLESS STEEL CAPSULES AS A FUNCTION OF TEMPERATURE (400-1800 F)
The mean heat capacity of a sample of powdered beryllium carbide, a possible moderator material for a nuclear reactor, was determined as a function of temperature. A thin-walled stainless steel capsule containing the material was heated in an electric furnace and dropped into a water calorimeter. The following linear equation for mean heat capacity over the temperature range 50 f C-T f C as a function of temperature, T, was derived from the data by the method of least squares: C/sub p/ = 0.299 + 2.16 x 10/sup -4/ T f C el temperatures 0.005 cal gm/sup -1/( f C)/sup -1/. The numerical value of C/sub p/ expressed by this equation is also equal to the mean heat capacity in Btu lb/sup -1/( f F)/sup -1/. (auth)
Date:
April 20, 1949
Creator:
Powers, H.; Kostigen, T. & Trice, J.B.
Object Type:
Report
System:
The UNT Digital Library
THE HEAT CAPACITY OF U$sub 3$O$sub 8$ POWDER AS A FUNCTION OF TEMPERATURE (400-1800 F)
The mean heat capacity of a sample of powdered U/sub 3/O/sub 8/ was determined as a function of temperature from measurements of heat content. A thin-walled nickel capsule containing the material was heated in an electric furnace and dropped into a water calorimeter The Mean heat capacity values calculated from the experimental data were nearly constant over the temperature range, room temperture to 250-975 deg C (482-1790 deg F). The average value was 0.074 plus or minus 0.004 cal gm/sup -1EDE/C/sup -2/ (0.074 plus or minus 0.004 Btu lb/sup -1 deg F/du p -1/). From 975-1100 deg C (1790-2012 deg F) a small rise was observed. (auth)
Date:
April 26, 1949
Creator:
Powers, H.; Welch, F. & Trice, J.B.
Object Type:
Report
System:
The UNT Digital Library
Intercooler cooling-air weight flow and pressure drop for minimum drag loss
Report presenting an analysis of the power losses in airplane flight of cross-flow plate and tubular intercoolers to determine the cooling-air weight flow and pressure drop that give minimum total power loss for any given cooling effectiveness. The investigation covers a range of flight conditions of altitude, airspeed, lift-drag ratio, supercharger-pressure ratio, and adiabatic efficiency.
Date:
April 1944
Creator:
Reuter, J. George & Valerino, Michael F.
Object Type:
Report
System:
The UNT Digital Library
Review of Flight Tests of NACA C and D Cowlings on the XP-42 Airplane
Report presenting the results of flight tests of the performance and cooling characteristics of three NACA D cowlings and of a conventional NACA C cowling on the XP-42 airplane. The D cowling is, generally, characterized by the use of an annular inlet and diffuser section for the engine-cooling air. An increase in maximum speed was noted in the XP-42 airplane due to the change from a C cowling to a D cowling.
Date:
April 1943
Creator:
Johnston, J. Ford
Object Type:
Report
System:
The UNT Digital Library
NACA Investigation of a Jet-Propulsion System Applicable to Flight
"Following a brief history of the NACA investigation of jet-propulsion, a discussion is given of the general investigation and analyses leading to the construction of the jet-propulsion ground-test mock-up. The results of burning experiments and of test measurements designed to allow quantitative flight-performance predictions of the system are presented and correlated with calculations. These calculations are then used to determine the performance of the system on the ground and in the air at various speeds and altitudes under various burning conditions. The application of the system to an experimental airplane is described and some performance predictions for this airplane are made" (p. 1).
Date:
April 1944
Creator:
Brown, Clinton E.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Procedure for Determination of Critical Stability and Control Characteristics of Airplanes
"This report outlines the flight conditions that are usually critical in determining the design of components of an airplane which affect its stability and control characteristics. The wind-tunnel tests necessary to determine the pertinent data for these conditions are indicated, and the methods of computation used to translate these data into characteristics which define the flying qualities of the airplane are illustrated" (p. 1).
Date:
April 1944
Creator:
Goett, Harry J.; Jackson, Roy P. & Belsley, Steven E.
Object Type:
Report
System:
The UNT Digital Library
Nitrided-steel piston rings for engines of high specific power
Report presenting testing of several designs of nitrided-steel piston rings under variable conditions of output. Testing indicated the importance of good surface finish and conformity of the ring to the bore. Results regarding temperature tests, single-cylinder-engine tests, and multicylinder-engine tests are provided.
Date:
April 1944
Creator:
Collins, John H., Jr.; Bisson, Edmond E. & Schmiedlin, Ralph F.
Object Type:
Report
System:
The UNT Digital Library
Some Recent Contributions to the Study of Transition and Turbulent Boundary Layers
Report presenting a paper in two parts about transition and turbulent boundary layers. The first part reviews the current problem of the instability of laminar boundary layers. The second part reviews the current state of knowledge of the mechanics of turbulent boundary layers and of the methods now being used for fundamental studies of the turbulent fluctuations in turbulent boundary layers.
Date:
April 1947
Creator:
Dryden, Hugh L.
Object Type:
Report
System:
The UNT Digital Library
Criminal investigation.
Describes procedures for criminal investigations conducted by military police during wartime. Discusses the purposes and functions of the Security Intelligence Corps (SIC).
Date:
April 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Laminar-boundary-layer oscillations and transition on a flat plate
Report presenting an investigation of oscillations in the laminar boundary layer on a flat plate and their relation to transition to turbulent flow. The characteristics of boundary-layer oscillations were studied most successfully when the oscillations were artificially produced by a vibrating ribbon placed in the boundary layer near the surface. A review of theory regarding laminar-boundary-layer oscillations is provided.
Date:
April 1943
Creator:
Schubauer, G. B. & Skramstad, H. K.
Object Type:
Report
System:
The UNT Digital Library
Browning machine gun caliber .50, M2, aircraft, fixed and flexible.
"In addition to a description of the Browning machine gun, caliber .50, M2, aircraft, fixed and flexible, this manual contains technical information required for the identification, use, and care of the materiel."
Date:
April 30, 1942
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
20-MM aircraft gun matériel M1 and M2.
"In addition to a description of the 20-mm aircraft gun matériel M1 and M2, this manual contains technical information required for the identification, use, and care of the matériel."
Date:
April 2, 1942
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Coal handling : repairs and utilities
"This Technical Manual describes uniform methods of coal handling for Army posts, camps, and stations. Methods are presented to insure efficient and economical operation, based on accepted commercial practices adapted to meet requirements of Army installations."
Date:
April 1947
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Electrical facilities : generating plants, repairs and utilities
"This Technical Manual describes the various types of electric generating equipment used on Army posts and discusses its operation, maintenance, and repair."
Date:
April 1945
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Lesson plans on practical firemanship.
"This Technical Manual is a guide to assist those who train post firefighters. It consists of a series of lesson plans covering each phase of firemanship, and a brief explanation of how to use the plans."
Date:
April 1946
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Pneumatic ponton bridge M3
Discusses the purpose and usage of the pneumatic pontoon bridge M3 by infantry in the field. Covers construction, deployment, and maintenance.
Date:
April 19, 1943
Creator:
United States. War Department.
Object Type:
Book
System:
The UNT Digital Library
Design of Nozzles for the Individual Cylinder Exhaust Jet Propulsion System
Report presenting an examination of the design of exhaust-stack nozzles for individual cylinder exhaust-gas jet propulsion and the results of tests on the effect of nozzle area on jet thrust and engine power. A satisfactory method of correlatig the test data for various engine-operating conditions is developed.
Date:
April 1941
Creator:
Pinkel, Benjamin; Turner, L. Richard & Voss, Fred
Object Type:
Report
System:
The UNT Digital Library
Flight Tests of Several Exhaust-Gas-to-Air Heat Exchangers in the B-17F Airplane
Report presenting flight testing of seven exhaust-gas-to-air heat exchangers on a B-17F airplane to determine their performance characteristics and to investigate their flame-suppression qualities. Testing was conducted to secure performance data of heat exchangers which might be suitable for use in the thermal ice-prevention and cabin-heating system of the heavy bomber-type airplanes.
Date:
April 1944
Creator:
Look, Bonne C. & Selna, James
Object Type:
Report
System:
The UNT Digital Library
[Students and teacher at the front of class]
Photograph of students seated along a bench at the front of a class room while the teacher stands behind them.
Date:
April 1940
Creator:
Clark, Joe
Object Type:
Photograph
System:
The UNT Digital Library
Coal Carbonization: Carbonizing Properties of Medium-Volatile Coals of Different Types
Report issued by the U.S. Bureau of Mines on the characteristics of different coal varieties after carbonization. The properties of these different coals are presented. This report includes tables, and photographs.
Date:
April 1944
Creator:
Reynolds, D. A. & Davies, J. D.
Object Type:
Report
System:
The UNT Digital Library
Georgia Mica Spots: Cherokee, Upson, Lamar, and Monroe Counties
Report issued by the Bureau of Mines over studies of mica deposits throughout four counties in Georgia. Descriptions of the physical features of the mines, and deposits are presented. This report includes tables, maps, and photographs.
Date:
April 1948
Creator:
Beck, William A.
Object Type:
Report
System:
The UNT Digital Library
Mining Program: Bureau of Mines Oil-Shale Project, Rifle, Colorado
Report issued by the Bureau of Mines on the development of efficient mining methods for producing oil shale. Characteristics of the oil shale deposits of the Green River are presented. The results of core drilling and sampling in this area are also listed. This report includes tables, illustrations, maps, and photographs.
Date:
April 1948
Creator:
Gardner, E. D.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Meta-Anthracite in Newport and Providence Counties, Rhode Island: Petrography, Chemical Characteristics, and Geology of Deposits: I. Investigation of the Field and the Physical and Chemical Characteristics of the Deposits; II. Preliminary Geologic Study of the Portsmouth and Cranston Areas, Rhode Island; III. General Conclusions
Report issued by the Bureau of Mines over studies conducted on the meta-anthracite of Rhode Island. The physical and chemical characteristics, geology, and petrography of the deposits are presented in three parts. The methods used in the study are also listed. This report includes tables, maps, photographs, and illustrations.
Date:
April 1948
Creator:
Toenges, Albert L.; Turnbull, Louis A.; Neale, Arthur; Schopf, J. M.; Abernethy, R. F. & Quinn, Alonzo W.
Object Type:
Report
System:
The UNT Digital Library
Flood-Prevention Projects at Pennsylvania Anthracite Mines: Progress Report for Fiscal Year Ended June 30, 1947
Report issued by the Bureau of Mines over the progress made on flood prevention in anthracite mines. As stated in the report, "the broad objective of the investigative work was to obtain factual data on: 1. anthracite reserves of Pennsylvania, 2. underground water pools, 3. barrier pillars, 4. the "buried valley" of the Susquehanna River, and 5. infiltration of surface water into underground mine workings" (p. 4). This report includes tables, graphs, maps, photographs, and illustrations.
Date:
April 1948
Creator:
Ash, S. H.; Cassap, W. E.; Eaton, W. L.; Hughes, Karl; Romischer, W. M. & Westfield, James
Object Type:
Report
System:
The UNT Digital Library