Collection
Technical Report Archive and Image Library
973
National Advisory Committee for Aeronautics Collection
557
Office of Scientific & Technical Information Technical Reports
548
TRAIL Microcard Collection
243
Texas Attorney General Opinions
158
Government Documents A to Z Digitization Project
21
Texas State Publications
18
USDA Farmers' Bulletins
11
Serial/Series Title
NACA Research Memorandums
340
NACA Technical Notes
190
Atomic Energy Commission Reports
135
United States Geological Survey Reports
90
Hanford Works Reports
61
Trace elements investigations report
52
HW (Series)
42
University of California Radiation Laboratory Reports
42
Oak Ridge National Laboratory Reports
30
BMI (Series)
24
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1,718 Matching Results
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An analysis of base pressure at supersonic velocities and comparison with experiment
From Introduction: "The primary purpose of the investigation described in the present report is to formulate a method which is of value for quantitative calculations of base pressure on airfoils and bodies without boat-tailing. Part I consists of a detailed study of the base pressure in two-dimensional and axially-symmetric inviscid flow. In part II a semi-empirical theory is formulated since the results of part I indicate that an inviscid-flow theory cannot possibly be satisfactory for quantitative calculations of a viscous flow."
Date:
July 1950
Creator:
Chapman, Dean R.
Object Type:
Report
System:
The UNT Digital Library
Analytical and Experimental Investigation of Adiabatic Turbulent Flow in Smooth Tubes
Note presenting equations derived for the prediction of velocity distributions for fully developed adiabtic turbulent flow in smooth tubes; both the incompressible and compressible flow cases were treated. The analysis produced a single equation that represents flow in both the conventional buffer layer and the laminar layer. The results for fully developed flow were correlated by using conventional dimensionless velocity and distance parameters, and agreed closely with those of Nikuradse and other investigators.
Date:
July 1950
Creator:
Deissler, Robert G.
Object Type:
Report
System:
The UNT Digital Library
Approximate aerodynamic influence coefficients for wings of arbitrary plan form in subsonic flow
From Summary: "Aerodynamic influence coefficients for symmetrically loaded wings of arbitrary plan form in subsonic flow are derived from a simple empirical method of estimating spanwise lift distributions. The application of the coefficients to an aeroelastic analysis is discussed."
Date:
July 1950
Creator:
Diederich, Franklin W.
Object Type:
Report
System:
The UNT Digital Library
Boundary-Layer Transition on a Cooled 20 Degree Cone at Mach Numbers of 1.5 and 2.0
Note presenting an investigation of the laminar boundary layer on a cooled 20 degree cone at Mach numbers of 1.5 and 2.0 to determine the variation of the position of transition with surface temperature for both constant surface temperatures and surface temperatures that increased toward the rear of the cone. The increase in the extent of the laminar boundary layer for uniform surface temperatures was found to be directly proportional to the difference between the surface and recovery temperatures.
Date:
July 1950
Creator:
Scherrer, Richard
Object Type:
Report
System:
The UNT Digital Library
Brookhaven National Laboratory, Annual Report, as of July 1, 1950. (Highlights)
None
Date:
July 1, 1950
Creator:
Laboratory, Brookhaven National
Object Type:
Report
System:
The UNT Digital Library
The calculation of downwash behind wings of arbitrary plan form at supersonic speeds
Report presenting exact and approximate methods based on linearized supersonic flow theory for the calculation of the velocity potential and the downwash from thin wings of arbitrary plan form. The applicability of the method inherently depends on a knowledge of the load distribution over the plan form of the wing.
Date:
July 1950
Creator:
Martin, John C.
Object Type:
Report
System:
The UNT Digital Library
The calculation of modes and frequencies of a modified structure from those of the unmodified structure
Report presenting a method that has been developed for the calculation of the natural coupled or uncoupled frequencies and modes of a structure with modifications directly from the known modes and frequencies of the unmodified structure. The method is advantageous when the modes and frequencies of the unmodified structure either are known or are required along with the modes and frequencies of the structure with various modifications.
Date:
July 1950
Creator:
Kruszewski, Edwin T. & Houbolt, John C.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Transonic Flows Past Thin Airfoils by Integral Method
Note presenting a method of calculating two-dimensional compressible flows past thin airfoils with particular reference to the transonic speed range. The method is based on the integral form of the equation of continuity and on the intrinsic form, in terms of the streamline curvature, of the irrotationality condition.
Date:
July 1950
Creator:
Perl, William
Object Type:
Report
System:
The UNT Digital Library
Comparison of Model and Full-Scale Spin Test Results for 60 Airplane Designs
Note presenting the results of spin-tunnel investigations compared with corresponding full-scale results for 60 different airplane designs. The purpose of the comparison was to determine the reliability of the model results in predicting full-scale spin and recovery characteristics. Results regarding the recovery characteristics, angle of attack, rate of rotation, altitude loss per revolution, angle of wing tilt, and emergency spin-recovery parachutes are provided.
Date:
July 1950
Creator:
Berman, Theodore
Object Type:
Report
System:
The UNT Digital Library
Design and Applications of Hot-Wire Anemometers for Steady-State Measurements at Transonic and Supersonic Airspeeds
Note presenting an investigation of the design requirements and heat-transfer characteristics of exposed-wire instruments to be used for steady-state measurements at transonic and supersonic speeds. Design criterions, construction details, and typical response behavior are presented.
Date:
July 1950
Creator:
Lowell, Herman H.
Object Type:
Report
System:
The UNT Digital Library
Development and Preliminary Investigation of a Method of Obtaining Hypersonic Aerodynamic Data by Firing Models Through Highly Cooled Gases
Note presenting a method of investigating hypersonic aerodynamic phenomena by firing simple symmetrical models at high velocity through a very cold gas with a low sonic velocity. Schileren photographs and focused shadowgraphs were taken of cylindrical models with conical forebodies with apex angles of 30, 45, and 60 degrees.
Date:
July 1950
Creator:
Soule, Harold V. & Sabol, Alexander P.
Object Type:
Report
System:
The UNT Digital Library
Development of a Mobile Compressor and Utility Station
Report issued by the U.S. Bureau of Mines on the development of a mobile compressor and utility station in the oil-shale mine near Rifle, Colorado during 1949. The report includes photographs and illustrations of the mobile station.
Date:
July 1950
Creator:
Wright, Fred D. & Ballinger, Homer J.
Object Type:
Report
System:
The UNT Digital Library
Effect of Intense Sound Waves on a Stationary Gas Flame
Intense sound waves with a resonant frequency of 5000 cycles per second were imposed on a stationary propane-air flame issuing from a nozzle. In addition to a slight increase of the flame velocity, a fundamental change both in the shape of the burning zone and in the flow pattern could be observed. An attempt is made to explain the origin of the variations in the flame configuration on the basis of transition at the nozzle from jet flow to potential flow.
Date:
July 1950
Creator:
Hahnemann, H. & Ehret, L.
Object Type:
Report
System:
The UNT Digital Library
Effect of Variation in Rivet Diameter and Pitch on the Average Stress at Maximum Load for 24S-T3 and 75S-T6 Aluminum-Alloy, Flat, Z-Stiffened Panels That Fail by Local Instability
"A study is made of the effect of variation in diameter and pitch of A17S-T4 aluminum-alloy flat-head rivets on the average stress at maximum load for 24S-T3 and 75S-T6 aluminum-alloy, flat, Z-stiffened panels that fail by local instability. A curve is presented for determining the diameter and pitch required to insure the development of a given average stress for local instability" (p. 1).
Date:
July 1950
Creator:
Dow, Norris F. & Hickman, William A.
Object Type:
Report
System:
The UNT Digital Library
Estimation of the damping in roll of supersonic-leading-edge wing-body combinations
From Summary: "A description is given of a linear-theory method for the estimation of the damping in roll of supersonic-leading-edge wings mounted on cylindrical bodies. The error resulting from an approximation essential to the method is shown to be small. The damping in roll is calculated for configurations having rectangular and triangular wings; for most of the range of variables the net effect of the body is to decrease the damping in roll."
Date:
July 1950
Creator:
Tucker, Warren A. & Piland, Robert O.
Object Type:
Report
System:
The UNT Digital Library
H. W. Laboratory manual: 100 Area section
The purpose of this manual is to present a Hazard Breakdown of all jobs normally encountered in the laboratory work of the three sections comprising the Analytic Section, Metallurgy and Control Division of the Technical Department. A Hazard Breakdown is a careful analysis of any job in which the source of possible dangers is clearly indicated for each particular step. The analysis is prepared by individuals who are thoroughly familiar with the specific job or procedure. It is felt that if the hazards herein outlined are recognized by the Laboratory personnel and the suggested safety cautions followed, the chance for injury will be minimized and the worker will become generally more safety conscious. The manual, which is prefaced by the general safety rules applying to all the laboratories, is divided into three main sections, one for each of the three sections into which the Laboratories Division is divided. These sections are as follows: Section 1 -- 200 Area Control; Section 2 -- 100 Area Control; Section 3 -- 300 Area Control, Essential Materials, and Methods Improvement.
Date:
July 1, 1950
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Harvesting and handling citrus fruits in the Gulf states.
Describes how to harvest, package, transport, and handle citrus fruits that are grown in the Gulf States, preventing damage and maintaining quality.
Date:
July 1950
Creator:
Winston, John R. (John Robinson), b. 1890
Object Type:
Book
System:
The UNT Digital Library
Hot Pressing of Uranium
None
Date:
July 1, 1950
Creator:
Pinto, N. P. & Hausner, H. H.
Object Type:
Report
System:
The UNT Digital Library
How to choose and use Cabbage.
Provides simple instructions for choosing, storing, and cooking cabbage.
Date:
July 1950
Creator:
United States. Department of Agriculture.
Object Type:
Pamphlet
System:
The UNT Digital Library
How to choose and use Carrots.
Provides simple instructions for choosing the best quality carrots, storing them, and cooking them.
Date:
July 1950
Creator:
United States. Department of Agriculture.
Object Type:
Pamphlet
System:
The UNT Digital Library
How to choose and use Potatoes.
Provides simple instructions for choosing, storing, and cooking potatoes.
Date:
July 1950
Creator:
United States. Department of Agriculture.
Object Type:
Pamphlet
System:
The UNT Digital Library
Improvements in Heat Transfer for Anti-Icing of Gas-Heated Airfoils with Internal Fins and Partitions
"The effect of modifying the gas passage of hollow metal airfoils by the addition of internal fins and partitions was experimentally investigated and comparisons were made among a basic unfinned airfoil section and two airfoil designs having metal fins attached at the leading edge of the internal gas passage. An analysis considering the effects of heat conduction in the airfoil metal was made to determine the internal modification effectiveness that may be obtained in gas-heated components, such as turbojet-inlet guide vanes, support struts, hollow propeller blades, and thin wings" (p. 1).
Date:
July 1950
Creator:
Gray, Vernon H.
Object Type:
Report
System:
The UNT Digital Library
Improving 4-H clubs : 4-H studies point the way to better organization and functioning.
Suggests ways for county extension agents or 4-H club leaders to strengthen club work in their communities.
Date:
July 1950
Creator:
United States. Extension Service.
Object Type:
Book
System:
The UNT Digital Library
Investigation of 75-millimeter-bore cylindrical roller bearings at high speeds: 1: Initial studies
Report presenting an experimental investigation of 75-millimeter-bore roller bearings of three different cage types were conducted over a range of DN values and static radial loads with circulatory oil feed. Three incipient failures were noted out of seven bearings investigated. Results regarding rig bearing temperatures, bearing failures, effect of running time, circumferential temperature distribution, effect of DN value on operating temperature, effect of load on operating temperature, effect of circumferential temperature distribution, and effect of differential expansion upon running clearance are provided.
Date:
July 1950
Creator:
Macks, E. Fred & Nemeth, Zolton N.
Object Type:
Report
System:
The UNT Digital Library