Collection
Technical Report Archive and Image Library
431
National Advisory Committee for Aeronautics Collection
366
Texas Attorney General Opinions
258
Office of Scientific & Technical Information Technical Reports
93
TRAIL Microcard Collection
44
World War Two Collection
24
Government Documents A to Z Digitization Project
23
World War Two Newsmaps
18
Texas State Publications
15
USDA Farmers' Bulletins
4
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841 Matching Results
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A Time History of Control Operation of a C-54 Airplane in Blind Landing Approaches
"Tests were made with a C-54 airplane in which airline pilots made several blind approaches to determine whether any special flying techniques were used in blind landings and whether any special handling-qualities requirements would have to be formulated because of such special techniques. It was found that the airplane was flown at all times in the normal manner; that is, all turns were banked turns that were nearly coordinated by use of the rudder so that the sideslip was held close to zero. The pilot expended considerable physical work in continually moving the controls but this wake was due in part to the large friction in the three control systems" (p. 1).
Date:
July 18, 1947
Creator:
Talmage, Donald B.
Object Type:
Report
System:
The UNT Digital Library
Tolerance to Sr{sup 89} and radium
Problems in extrapolation of the rate of tumor formation by strontium 89 from animal to man are addressed. Focus of this paper is on variability of latency period between different animals.
Date:
July 22, 1946
Creator:
Brues, A.M.
Object Type:
Report
System:
The UNT Digital Library
Tomorrow's food.
Describes the Agricultural Conservation Program and its role in safeguarding the food supply through soil conservation assistance.
Date:
July 1949
Creator:
United States. Agricultural Conservation Programs Branch.
Object Type:
Book
System:
The UNT Digital Library
Tuft Studies of the Flow over a Wing at Four Angles of Sweep
Studies of the stalling characteristics show that the stall begins at the tip and moves inboard with increasing angle of attack at positive sweep; the sta11 begins at root and moves outboard at negative sweep (sweepforward). At +/-45 deg sweep the stall was less sharply defined than at the lower angles of sweep. No effect of Mach number on the.flow patterns as indicated by tufts was found in the speed range of these tests which extended to a Mach number of 0.55.
Date:
July 10, 1947
Creator:
Hieser, Gerald
Object Type:
Report
System:
The UNT Digital Library
Tunnel Correction for Compressible Subsonic Flow
"This report presents a treatment of the effects of the tunnel walls on the flow velocity and direction in a compressible medium at subsonic speed by an approximate method. Calculations are given for the rotationally symmetric and two-dimensional problems of the flow past bodies, as well for the downwash effect in the tunnel with circular cross section" (p. 1).
Date:
July 1947
Creator:
v. Baranoff, A.
Object Type:
Report
System:
The UNT Digital Library
Two-dimensional investigation of five related NACA airfoil sections designed for rotating-wing aircraft
Report presenting testing of five NACA airfoil sections intended for use in rotor blades in the two-dimensional low-turbulence tunnel. The airfoils varied in thickness and theoretical design lit coefficients. Results regarding pitching moment, lift, drag, and helicopter performance calculations are provided.
Date:
July 1949
Creator:
Schaefer, Raymond F.; Loftin, Laurence K., Jr. & Horton, Elmer A.
Object Type:
Report
System:
The UNT Digital Library
Two-Dimensional Potential Flow Past an Ordinary Thick Wing Profile
"This report deals with the development of a method which gives a lucid and convenient solution of the flow conditions in the vicinity of a common, thick airfoil section wherein the thickness of the profile is taken into account. The method consists in making the airfoil the streamline in a parallel flow by disposing on its mean line certain source and vortex distributions the fields of which are superposed on the parallel flow. These distributions of singularities are secured for the generalized Karman-Trefftz profile by means of conformal transformation from the flow about a circle" (p. 1).
Date:
July 1942
Creator:
Keune, F.
Object Type:
Report
System:
The UNT Digital Library
Two-dimensional wind tunnel investigation of a symmetrical airfoil section with a sealed internally balanced control surface and a leading tab
Report presenting an investigation in the two-dimensional low-turbulence tunnel of a symmetrical airfoil section equipped with a 0.30-airfoil-chord sealed internally balanced flap with a 0.70-flap-chord overhang and a 0.33-flap-chord leading tab. Results regarding airfoil lift, surface pressure, flap hinge-moment, and flap-balance-chamber pressure characteristics at various flap deflections.
Date:
July 18, 1949
Creator:
Nuber, Robert J. & Fullmer, Felicien F., Jr.
Object Type:
Report
System:
The UNT Digital Library
Two-dimensional wind-tunnel investigation of sealed 0.22-airfoil-chord internally balanced ailerons of different contour on an NACA 65(112)- 213 airfoil
Report presenting a two-dimensional wind-tunnel investigation made of two interchangeable sealed 0.22-airfoil-chord internally balanced ailerons on an NACA 65(sub 112)-213 airfoil. One aileron tested was of true airfoil contour and the other was modified by partly eliminating the cusp near the trialing edge. Results regarding aileron effectiveness, aileron hinge moments, lift, drag, and airfoil pressure distribution and critical Mach number are provided.
Date:
July 1946
Creator:
Braslow, Albert L.
Object Type:
Report
System:
The UNT Digital Library
U.S. Graded and Stamped Meat.
Describes the official grades for beef, lamb and mutton, and veal and calf. Provides charts of meat cuts.
Date:
July 1940
Creator:
United States. Agricultural Marketing Service.
Object Type:
Book
System:
The UNT Digital Library
A unified theory of plastic buckling of columns and plates
On the basis of modern plasticity considerations, a unified theory of plastic buckling applicable to both columns and plates has been developed. For uniform compression, the theory shows that long columns which bend without appreciable twisting require the tangent modulus and that long flanges which twist without appreciable bending require the secant modulus. Structures that both bend and twist when they buckle require a modulus which is a combination of the secant modulus and the tangent modulus.
Date:
July 29, 1947
Creator:
Stowell, Elbridge Z.
Object Type:
Report
System:
The UNT Digital Library
THE URANIUM-MOLYBDENUM BINARY SYSTEM
None
Date:
July 1, 1945
Creator:
Ahmann, D; Snow, A I & Wilson, A S
Object Type:
Report
System:
The UNT Digital Library
Urine Analysis for Tritium Oxide
This report analyzes a procedure based on the production of acetylene from the active water, with subsequent measurement of the ionization caused by the tritium beta particle. This eliminates the troublesome absorption on the chamber walls when hydrogen is used, and provides a rapid method for the preparation of the urine samples.
Date:
July 27, 1949
Creator:
Healy, J. W.
Object Type:
Report
System:
The UNT Digital Library
Urine Analysis for Tritium Oxide
This paper describes a means of determining tritium oxides in urine relying upon the production of acetylene from the active water with subsequent measurement of the ionization caused by the tritium beta particle.
Date:
July 27, 1949
Creator:
Healy, J. W.
Object Type:
Report
System:
The UNT Digital Library
Use of Subaudible Noises for the Prediction of Rock Bursts
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.
Date:
July 1942
Creator:
Obert, Leonard & Duvall, Wilbur
Object Type:
Report
System:
The UNT Digital Library
Vanadium-Bearing Phosphatic Shale in West-Central Wyoming and Southeastern Idaho
Discussing Vanadium-bearing phosphatic shale produced in West-central Wyoming and Southeastern Idaho
Date:
July 23, 1942
Creator:
Rubey, William Walden & McKelvey, V. E.
Object Type:
Report
System:
The UNT Digital Library
Vibration Survey of NACA 24-Inch Supersonic Axial-Flow Compressor
"Vibration investigations were made of two blade cascades in wind tunnels and of blades operated in the NACA 24-inch supersonic compressor. The results showed that the blade vibrations were present at all tunnel and compressor air velocities and were influenced primarily by tunnel design, simulated centrifugal loading, surging, angle of attack, and possible critical Mach numbers" (p. 1).
Date:
July 30, 1948
Creator:
Meyer, André J., Jr. & Hanson, Morgan P.
Object Type:
Report
System:
The UNT Digital Library
Wake studies of eight model propellers
Report presenting an investigation of the influences of shank form and pitch distribution on the characteristics of constant-speed propellers as determine from the wakes of eight model propellers. The experiments show that an improvement in efficiency occurs from the substitution of faired shanks for round ones, which is caused by disproportionate local augmentations of thrust and torque. Results regarding a comparison with force tests, method of comparing performance characteristics, effects of shank form, effects of pitch distribution, independence of blade elements, and section lift characteristics are provided.
Date:
July 1946
Creator:
Reid, Elliott G.
Object Type:
Report
System:
The UNT Digital Library
Waste disposal: Failure of T Plant underground metal waste line from Section 9
On June 23, 1947, a hole was discovered in the earthen fill near the T Plant R-19 stairwell directly above the path followed by the underground waste lines from the canyon. Jetting of all canyon wastes to the 241 Buildings was stopped and the canyon process shut down. This report discusses repair and characterization procedures for the soils and waste line pipe.
Date:
July 15, 1947
Creator:
Chapman, V. R.
Object Type:
Report
System:
The UNT Digital Library
Water tolerance of aviation gasoline containing xylidines
Report presenting investigations to determine the effect of xylidines on the saturation concentration of water in aviation gasoline. The saturation concentration of water in gasoline containing 0, 1, and 3 percent xylidines was determined using fresh water at two temperatures and sea water at one temperature.
Date:
July 1943
Creator:
Revilock, Joseph & Olson, Walter T.
Object Type:
Report
System:
The UNT Digital Library
What are we aiming at? : a forest conservation program.
Describes the need for a postwar program to increase timber production. Discusses the need for regulated conservation practices, incentives for responsible private forest management, and an increase in public forest land area.
Date:
July 1945
Creator:
United States. Department of Agriculture.
Object Type:
Book
System:
The UNT Digital Library
Wind-tunnel investigation of a plain aileron and a balanced aileron on a tapered wing with full-span duplex flaps
Report presenting an investigation of a plain aileron and a balanced aileron on a tapered wing with full-span duplex flaps, which consisted of an inboard NACA slotted flap and an outboard balanced split flap. Increments of maximum lift coefficient of 0.82 and 1.04 were obtained from the inboard flap alone and from the duplex-flap combination.
Date:
July 1942
Creator:
Rogallo, F. M. & Lowry, John G.
Object Type:
Report
System:
The UNT Digital Library
Wind-tunnel investigation of a tapered wing with a plug-type spoiler-slot aileron and full-span slotted flaps
Report presenting an investigation in the 7- by 10-foot wind tunnel of several arrangements of a plug-type spoiler-slot aileron on a tapered wing model of a typical fighter airplane with a full-span slotted flap. When the aileron is deflected, the plug projects from the upper surface of the wing as a spoiler and makes a slot appear behind the spoiler.
Date:
July 1942
Creator:
Lowry, John G. & Liddell, Robert B.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of a Wing-Fuselage Combination With External Stores
Report presenting an investigation of a basic wing-fuselage combination with several types of external-store installations meant to delay the advent of airplane buffet caused by external stores. Modifications for airplane design in order to minimize the effect of drag are provided. Some of the arrangements tested included the tandem-mounted arrangement, flush-mounted arrangement, store with a fan-shaped tail, and auxiliary airfoil arrangement.
Date:
July 9, 1948
Creator:
Silvers, H. Norman & Spreemann, Kenneth P.
Object Type:
Report
System:
The UNT Digital Library