Resource Type
Partner
Collection
Technical Report Archive and Image Library
740
National Advisory Committee for Aeronautics Collection
509
Office of Scientific & Technical Information Technical Reports
227
TRAIL Microcard Collection
116
Texas State Publications
5
Docs In The News
2
Stillwater History Museum at the Sheerar, Stillwater, Oklahoma
2
General Collection
2
Boy and Girl Scout Annual Reports
1
Federal Communications Reports
1
2 More
Serial/Series Title
NACA Research Memorandums
269
NACA Technical Notes
133
Atomic Energy Commission Reports
113
NACA Technical Reports
54
NACA Technical Memorandums
50
United States Bureau of Mines Reports
47
Hanford Works Reports
33
Report of investigations (United States. Bureau of Mines)
30
HW (Series)
29
United States Geological Survey Reports
27
51 More
States
Successional Speciation in Paleontology: The case of the Oysters of the sellaeformis Stock
Paleontological report containing an examination of an ancient species of stock oyster and four separate successional species of oyster that resulted from that stock. This example is presented under the successional mode of speciation of Julian Huxley.
Date:
1949
Creator:
Stenzel, H. B.
System:
The Portal to Texas History
Summary of section data on trailing-edge high-lift devices
"A summary has been made of available data on the characteristics of airfoil sections with trailing-edge high-lift devices. Data for plain, split, and slotted flaps are collected and analyzed. The effects of each of the variables involved in the design of the various types of flap are examined and, in cases where sufficient data are given, optimum configurations are deduced. Wherever possible, the effects of airfoil section, Reynolds number, and leading-edge roughness are shown. For single and double slotted flaps, where a large amount of unrelated data are available, maximum lift coefficients of many configurations are presented in tables" (p. 1).
Date:
1949
Creator:
Cahill, Jones F.
System:
The UNT Digital Library
Summary report on measurement and control of radioactive particulate contamination for Engineering Division, Atomic Energy Commission
The purpose of this report is to review the characteristics of particulate contamination which set it apart from the other phases of the radiation control program and make it necessary to apply to it different concepts, analytical procedures, and control measures. The program is treated as one in the appraisal and control of dusts and fumes. The fact that the material is radioactive introduces certain new details, but this does not make the problem basically different from others in the field of industrial dust control.
Date:
January 1, 1949
Creator:
Hatch, T.F.
System:
The UNT Digital Library
Tables of the Confluent Hypergeometric Function F(n/2, 1/2; X) and Related Functions
Report presenting tables of the confluent hypergeometric function and some related functions. Information regarding the scope of tables, analytical properties, and approximations are provided.
Date:
1949
Creator:
United States. National Bureau of Standards. Computation Laboratory.
System:
The UNT Digital Library
Texas Annual Morbidity Report: 1948
The report provides data and information about communicable and reportable diseases in Texas during 1948, broken out by county.
Date:
1949
Creator:
Texas. State Department of Health.
System:
The Portal to Texas History
Texas Annual Morbidity Report: 1949
The report provides data and information about communicable and reportable diseases in Texas during 1949, broken out by county.
Date:
1949
Creator:
Texas. State Department of Health.
System:
The Portal to Texas History
Theoretical analysis of oscillations of a towed cable
Report presenting a theoretical study of the oscillations of a towed cable, which indicated that oscillations traveling downwind along the cable are amplified by aerodynamic forces when the airspeed is greater than the speed of propagation of waves along the cable. The theory provides a possible explanation for the violent motions of towed airspeed heads which appear above a certain speed.
Date:
1949
Creator:
Phillips, William H.
System:
The UNT Digital Library
Theoretical characteristics in supersonic flow of two types of control surfaces on triangular wings
From Summary :"Methods based on the linearized theory for supersonic flow were used to find the characteristics of two types of control surfaces on thin triangular wings. The first type, the constant-chord partial-span flap, was considered to extend either outboard from the center of the wing or inboard from the wing tip. The second type, the full-triangular-tip flap, was treated only for the case in which the Mach number component normal to the leading edge is supersonic. For each type, expressions were found for the lift, rolling-moment, pitching-moment, and hinge-moment characteristics."
Date:
1949
Creator:
Tucker, Warren A. & Nelson, Robert L.
System:
The UNT Digital Library
Theoretical Stability Derivatives of Thin Sweptback Wings Tapered to a Point With Sweptback or Sweptforward Trailing Edges for a Limited Range of Supersonic Speeds
Note presenting the stability derivatives valid for a limited range of supersonic speeds for a series of sweptback wings tapered to a point with sweptback or sweptforward trailing edges. The wings were derived by modifying the trailing edge of a basic triangular wing so that it coincided with lines drawn from the wing tips to the wing axis of symmetry.
Date:
January 1949
Creator:
Malvestuto, Frank S., Jr. & Margolis, Kenneth
System:
The UNT Digital Library
Theory of the Inlet and Exhaust Processes of Internal-Combustion Engines
Note presenting a theory that has been developed for the calculation of the mass of fluid pumped per stroke and of indicator diagrams for the pumping process of internal-combustion engines, compressors, or vacuum pumps. The theory enables the volumetric efficiency and indicator diagrams for the inlet and exhaust processes of an internal-combustion engine to be obtained even before the engine is actually built. It is also possible to calculate some hypothetical inlet and exhaust processes which are impossible to obtain on actual engines, such as the cases where the valves open and close instantaneously.
Date:
January 1949
Creator:
Tsu, Tsung-Chi
System:
The UNT Digital Library
Two-Dimensional Compressible Flow in Turbomachines With Conic Flow Surfaces
"A general method of analysis is developed for two-dimensional, steady, compressible flow in stators or rotors of radial and mixed flow turbomachines with conic flow surfaces (surfaces of right circular cones generated by center line of flow passage in the axial-radial plane). The variables taken into account are: (1) tip speed of the rotor, (2) flow rate, (3) blade shape, (4) variation in passage height with radius, (5) number of blades, and (6) cone angle of the flow surface. Relaxation methods are used to solve the nonlinear differential equation for the stream function" (p. 1).
Date:
1949
Creator:
Stanitz, John D.
System:
The UNT Digital Library
Two Year Feeding Test
The following report presents the results of the second year of the two-year feeding tests of uranium compounds to 50 male and 50 female rats.
Date:
1949
Creator:
Maynard, Elliott A.; Downs, William L. & Hodge, Harold C.
System:
The UNT Digital Library
United States Earthquakes, 1949
Report discussing earthquake activity in the United States during 1949. The report is broken down by regions and has sections for specific earthquakes.
Date:
1949
Creator:
unknown
System:
The UNT Digital Library
Uranium Tetrafluoride (UFâ‚„)
The following report analyzes the effects of uranium tetrafluoride on male and female rats within a two-year period.
Date:
1949
Creator:
Maynard, Elliott A.
System:
The UNT Digital Library
Uranyl Fluoride (UOâ‚‚Fâ‚‚)
This report analyzes the radiation effects of uranyl fluoride on groups of male and female rats within a period of two years.
Date:
1949
Creator:
Maynard, Elliott A.
System:
The UNT Digital Library
Uranyl Nitrate Hexahydrate (UO₂(NO₃)2. 6H₂O)
This report follows investigations on the radiation effects of uranyl nitrate hexahydrate on groups of 15 to 25 male and female rats within a period of two years.
Date:
1949
Creator:
Maynard, Elliott A.
System:
The UNT Digital Library
Water Pools in Pennsylvania Anthracite Mines
Report issued by the Bureau of Mines discussing water pools that accumulate in Pennsylvania anthracite mines. Factors that lead to underground water pools, and methods for water drainage are presented. This report includes tables, maps, illustrations, and photographs.
Date:
1949
Creator:
Ash, S. H.; Eaton, W. L.; Hughes, Karl; Romischer, W. M. & Westfield, J.
System:
The UNT Digital Library
Wind-Tunnel Investigation of an NACA 65-210 Semispan Wing Equipped With Circular Plug Ailerons and a Full-Span Slotted Flap
Note presenting a wind-tunnel investigation made of the lateral-control characteristics of a thin, low-drag, semispan wing equipped with three configurations of circular plug ailerons and a full-span, 25-percent-chord, slotted flap. The investigation was performed through a Mach number range of 0.13 to 0.61. Results regarding wing aerodynamic characteristics, aileron control characteristics, comparison of lateral-control characteristics of the three configurations of circular plug aileron, comparison of lateral-control characteristics of the circular plug ailerons, a conventional plug aileron, and a retractable aileron, and a comparison of lateral-control characteristics of the circular plug ailerons with those of a sealed plain aileron are provided.
Date:
January 1949
Creator:
Fischel, Jack
System:
The UNT Digital Library
Wind-tunnel investigation of the spinning characteristics of a model of a twin-tail low-wing personal-owner-type airplane with linked and unlinked rudder and aileron controls
Report presenting a spin investigation in the 20-foot free-spinning tunnel of a model of a twin-tail low-wing personal-owner-type airplane with linked and unlinked rudder and aileron controls. The model was tested for two wing loadings and three mass distributions. When the rudders and ailerons were linked for two-control operation, the model generally would not spin.
Date:
January 1949
Creator:
Klinar, Walter J. & Gale, Lawrence J.
System:
The UNT Digital Library
Determination of slug temperatures for various power levels
This study was undertaken to determine the maximum temperatures that may be expected in slugs under various operating power levels. Information of this nature is required to properly evaluate the effects on the slug of pile operation at power levels higher than those currently in use.
Date:
January 5, 1949
Creator:
Burda, E.J.
System:
The UNT Digital Library
Laminar mixing of a compressible fluid
From Summary: "A theoretical investigation of the velocity profiles for laminar mixing of a high-velocity stream with a region of fluid at rest has been made assuming that the Prandtl number is unity. A method which involves only quadratures is presented for calculating the velocity profile in the mixing layer for an arbitrary value of the free-stream Mach number. Detailed velocity profiles have been calculated for free-stream Mach numbers of 0, 1, 2, 3, and 5."
Date:
January 5, 1949
Creator:
Chapman, Dean R.
System:
The UNT Digital Library
Initial Experiments on Flutter of Unswept Cantilever Wings at Mach Number 1.3
Report presenting the results of a preliminary experimental flutter investigation of widely different unswept cantilever wings at Mach number 1.3. Wings with a variety of mass-density parameters, center-of-gravity positions, and elastic-axis positions were tested.
Date:
January 6, 1949
Creator:
Tuovila, W. J.; Baker, John E. & Regier, Arthur A.
System:
The UNT Digital Library
The Effect of Air Jets Simulating Chines or Multiple Steps on the Hydrodynamic Characteristics of a Streamline Fuselage
Memorandum presenting preliminary tests in order to determine the effect of forced ventilation on the hydrodynamic characteristics of a scale model of a streamline fuselage of a hypothetical transonic airplane. The forced ventilation consisted of air ejected at about 300 feet per second through small orifices distributed over the fuselage bottom in a series of patterns simulating chines or multiple steps. Results regarding resistance, effective hydrodynamic lift, trim, spray, and air flow are provided.
Date:
January 7, 1949
Creator:
Weinflash, Bernard
System:
The UNT Digital Library
[Office of Hanford Directed Operations events of importance for week ending January 5, 1949]
This report details events of importance reported by the Hanford Operations Office for the week ending January 5, 1949.
Date:
January 7, 1949
Creator:
Schlemmer, F. C.
System:
The UNT Digital Library