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465 Matching Results
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Technical Manual HP-100. (Change 4, April 16, 1962)
None
Date:
October 8, 1948
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A Study to Develop a Manual for the Teaching of Speedball to Boys of the Secondary School as a Physical Education and Recreation Activity
The purpose of the study was to make available to physical education instructors and recreation leaders an instruction book that will serve as a guide in the following areas: 1. In the organization and conduct of the game of speedball for boys in secondary school in physical education classes or recreation groups; 2. In the teaching of speedball as a physical education or recreation activity for boys on the secondary school level.
Date:
1948
Creator:
Mumford, W. M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Pressure-sensitive system for gas-temperature control
From Summary: "A thermodynamic relation is derived and simplified for use as a temperature-limiting control equation involving measurement of gas temperature before combustion and gas pressures before and after combustion. For critical flow in the turbine nozzles of gas-turbine engines, the control equation is further simplified to require only measurements upstream of the burner. Hypothetical control systems are discussed to illustrate application of the control equations."
Date:
March 4, 1948
Creator:
Cesaro, Richard S. & Matz, Norman
Object Type:
Report
System:
The UNT Digital Library
A Mechanism for Automatic and Manual Control of the Air Velocity at the Window Opening of Fume Hoods
An effort to develop a control on the air velocity at the door opening of a fume hood.
Date:
November 15, 1948
Creator:
Weber, John, Jr.
Object Type:
Report
System:
The UNT Digital Library
A Study of Ceramic Coatings for High-Temperature Protection of Molybdenum
Note presenting some results that have been obtained so far on ceramic coatings for molybdenum. The results indicated that the oxidation of the molybdenum was greatly retarded by the best of the ceramic coatings tried. Protection is possible in oxidizing atmospheres at gas temperatures up to 3500 degrees Fahrenheit.
Date:
July 1948
Creator:
Moore, D. G.; Bolz, L. H. & Harrison, W. N.
Object Type:
Report
System:
The UNT Digital Library
Tables of Hypergeometric Functions for Use in Compressible-Flow Theory
"In the hodograph method of treating plane potential compressible flows the differential equation, originally obtained by Chaplygin in his study on gas jets, plays a significant role. This paper tabulates various hypergeometric functions which arise as particular solutions of Chaplygin's differential equation. The tables should prove useful in the tabulation of other auxiliary functions which may arise in various compressible-flow problems. The adiabatic index for air has been taken as 1.4" (p. 1).
Date:
October 1948
Creator:
Huckel, Vera
Object Type:
Report
System:
The UNT Digital Library
Friction Coefficients in the Inlet Length of Smooth Round Tubes
Note presenting an experimental study of friction coefficients near the inlet of smooth, round tubes with bellmouth entrances. Four different combinations of approach section and bellmouth entry were used. Results regarding the apparent local friction coefficient, integrated friction coefficient, effect of induced turbulence, laminar inlet zone, developed friction coefficient, and application to discharge coefficients for rounded-entrance flow nozzles are provided.
Date:
November 1948
Creator:
Shapiro, Ascher H. & Smith, R. Douglas
Object Type:
Report
System:
The UNT Digital Library
De-Icing Effectiveness of External Electric Heaters for Propeller Blades
Note presenting an investigation in the icing research tunnel to determine the icing protection provided by external rubber-clad blade heaters at several icing, heating, and propeller operating conditions. Data are presented to show the effect of propeller speed, ambient-air temperature, liquid-water concentration, heating-power density, duration of heating, and total cycle times on the power requirements and de-icing performance of the blade heaters.
Date:
February 1948
Creator:
Lewis, James P.
Object Type:
Report
System:
The UNT Digital Library
De-Icing Effectiveness of External Electric Heaters for Propeller Blades
Note presenting an investigation in the icing research tunnel to determine the icing protection provided by external rubber-clad blade heaters at several icing, heating, and propeller operating conditions. Data are presented to show the effect of propeller speed, ambient-air temperature, liquid-water concentration, heating-power density, duration of heating, and total cycle times on the power requirements and de-icing performance of the blade heaters.
Date:
February 1948
Creator:
Lewis, James P.
Object Type:
Report
System:
The UNT Digital Library
De-Icing Effectiveness of External Electric Heaters for Propeller Blades
Note presenting an investigation in the icing research tunnel to determine the icing protection provided by external rubber-clad blade heaters at several icing, heating, and propeller operating conditions. Data are presented to show the effect of propeller speed, ambient-air temperature, liquid-water concentration, heating-power density, duration of heating, and total cycle times on the power requirements and de-icing performance of the blade heaters.
Date:
February 1948
Creator:
Lewis, James P.
Object Type:
Report
System:
The UNT Digital Library
An Analysis of the Variation With Altitude of Effective Gust Velocity in Convective-Type Clouds
From Introduction: "In the present paper, the variation of effective gust velocity in convective-type clouds with altitude is investigated. Data obtained during 1941 and 1942 at altitudes up to 34,000 feet and data obtained more recently from the Thunderstorm Project (reference 5) at altitudes up to 26,000 feet are utilized for this purpose. Consideration is given in analyzing the results both to data for the range
Date:
June 1948
Creator:
Tolefson, H. B.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the airspeed and normal accelerations of Douglas DC-2 airplanes in commercial transport operation
From Introduction: "This paper summarizes the results of an analysis of V-G records taken on Douglas DC-2 airplanes during the period from June 1935 to December 1940. The operational life is compared with the operational lives of other airplanes flown on different routes during the corresponding period."
Date:
November 1948
Creator:
Walker, Walter G.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the airspeeds and normal accelerations of Martin M-130 airplanes in commercial transport operation
From Introduction: "Acceleration and airspeed data obtained from V-G records collected during commercial transport operations (references 1 and 2) are being analyzed in some detail to determine the flight loads and operating speeds as functions of airplane, route, season, and prewar and wartime operations."
Date:
September 1948
Creator:
Walker, Walter G.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the airspeeds and normal accelerations of Sikorsky S-42A airplanes in commercial transport operation
From Introduction: "This paper gives the results of an analysis of V-G data taken on four Sikorsky S-42A flying boats operated on Caribbean routes and along the east coast of South America during the period from 1936 to 1939. The available S-42A data are summarized and flight-load results are compared with the results of analyses made in the past."
Date:
October 1948
Creator:
Walker, Walter G.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the airspeeds and normal accelerations of Boeing B-247 and B-247D airplanes in commercial transport operation
From Introduction: "The results of analyses of V-G data given in references 1 to 5 have shown that the flight loads of airplanes operated in commercial transport service are influenced by operating speeds and by forecasting and dispatching practices as reflected in differences between operations during the prewar and wartime periods. The available data are summarized and the flight results are compared with the results of analyses made in references 1 to 5."
Date:
December 1948
Creator:
Walker, Walter G. & Hadlock, Ivan K.
Object Type:
Report
System:
The UNT Digital Library
University of Chicago Spectroscopic Laboratory Annual Report: September 1, 1947 - August 31, 1948, Part 1
Report containing articles, manuscripts, and tabulations of recorded spectra created by the Spectroscopic Laboratory of the University of Chicago.
Date:
1948-08~
Creator:
University of Chicago. Laboratory of Molecular Structure and Spectra.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the Design and Control of Asphalt Paving Mixtures: Volume 1
"This report presents the results of laboratory and field tests conducted by the Corps of Engineers to develop a method for the design and construction control of asphalt paving mixtures. The investigation consisted of: (a) the selection of a test apparatus and the performance of laboratory studies to develop techniques and procedures; (b) the construction of a test section and the performance of traffic tests with 15,000 and 37,000-lb single and 60,000-lb dual wheel loads to obtain design criteria; and (c) additional laboratory work to adjust the test procedures to the design criteria" (p. 1).
Date:
May 1948
Creator:
Waterways Experiment Station (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Effect of Variables in Welding Technique on the Strength of Direct-Current Metal-Arc-Welded Joints in Aircraft Steel 2 - Repeated-Stress Tests of Joints in SAE 4130 Seamless Steel Tubing
"A series of tests were made for the purposes of establishing the effects of several variables in welding technique on the fatigue strength of arc-welded joints in SAE 4130 seamless steel tubing. The variables included type of electrode, speed of welding, current, position, amount of preheat, and other factors which in turn controlled the weld contour, penetration, and depth of the heat-affected zone. A range of joint design was also investigated" (p. 1).
Date:
April 1948
Creator:
Voldrich, C. B. & Armstrong, E. T.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Aircraft Heaters XXVIII : Equations for Steady-State Temperature Distribution Caused by Thermal Sources in Flat Plates Applied to Calculation of Thermocouple Errors, Heat-meter Corrections, and Heat Transfer by Pin-fin Plates
Report presenting an equation for steady-sate temperature distribution caused by a thermal source (or sink) in a flat plate surrounded on either side by fluids of different temperature and applications for three sections in the report.
Date:
August 1948
Creator:
Boelter, L. M. K.; Romie, F. E.; Guibert, A. G. & Miller, M. A.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the Design and Control of Asphalt Paving Mixtures: Volume 3
"This appendix presents a description of the loading equipment, the tracking procedure, and the results of tests and observations made during and after the traffic tests on the asphalt stability test section. Analyses of the test results are also included" (p. 1).
Date:
May 1948
Creator:
Waterways Experiment Station (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Electronics progress report, December 1--31, 1948
Equipment and supplies are being packed for moving to Mound Laboratory. Work was started on the development of a cathode-follower circuit to match a B-wall tube to its connecting cable. The final report and maintenance manual for the scaler-multiplier are almost finished. The 10 millivolt Speedomax recorder used by Group 3 in the study of electrodeposition potentials has been replaced with a 150 millivolt Speedomax, utilizing two recording points for simultaneous recording of radioactive deposition and the plating cell current. Three two-input B-wall mixers, three scaler-multipliers, one four-input Geiger-Mueller mixer and five Thyratron heater controls were delivered to Group 24. One high-current plating control, EL-173, was delivered to Group 17. The following instruments are complete: portable pulse generator, EL-261, the instruction book and photographs will be submitted for approval at an early date. Portable regulation checker, EL-258. Preliminary tests have been made, instructions are being written and drawings are being made.
Date:
December 31, 1948
Creator:
Heyd, J. W. & Ohmart, P. E.
Object Type:
Report
System:
The UNT Digital Library
Report on the Brookhaven Nuclear Reactor Prepared for Reactor Safeguard Committee of the Atomic Energy Commission
This technical report provides a general description of the Brookhaven National Laboratory, describing the nuclear characteristics of the Brookhaven reactor and more detailed descriptions of the features and instrumentation of the reactor.
Date:
June 22, 1948
Creator:
Brookhaven National Laboratory
Object Type:
Report
System:
The UNT Digital Library
Research and Development Reports, Vol. V, No. 6
None
Date:
September 30, 1948
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Reactor Control Considerations
None
Date:
September 20, 1948
Creator:
Brown, G. S.
Object Type:
Report
System:
The UNT Digital Library