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Technical Report Archive and Image Library
84
National Advisory Committee for Aeronautics Collection
42
Texas State Publications
27
United States Experiment Station Record
15
Boy and Girl Scout Annual Reports
10
Office of Scientific & Technical Information Technical Reports
10
United States Experiment Station Reports
10
Texas House of Representatives Journals
8
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5
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United States Bureau of Mines Reports
21
NACA Research Memorandums
19
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19
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15
Annual Report of the Boy Scouts of America
10
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10
NACA Technical Notes
10
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9
Journal of the House of Representatives, Texas Legislature
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181 Matching Results
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Effect of Blade Loading of the Climb and High-Speed Performance of a Three-Blade Hamilton Standard No. 6507A-2 Propeller on a Republic P-47D Airplane
Report presenting climb and high-speed tests of a Hamilton Standard No. 6507A-2 three-blade propeller, which have been made to determine the effect of blade loading on propeller efficiency. The normal and military power climb efficiencies were found to be about equal at altitudes below 16,000 feet.
Date:
July 1945
Creator:
Gardner, John J.
Object Type:
Report
System:
The UNT Digital Library
Drag Measurements in Flight on the 10-Percent-Thick and 8-Percent-Thick Wing X-1 Airplanes
Report presenting drag measurements made on a 10-percent-thick wing and 8-percent-thick tail and a 8-percent-thick wing, 6-percent-thick tail version of the X-1 airplane at a variety of Mach numbers. The drag of the thicker wing was found to be much higher than that of the thinner wing. The fuselage was found to cause interference with the wing of both models, making the separation of wing and fuselage drag difficult to determine.
Date:
November 19, 1948
Creator:
Gardner, John J.
Object Type:
Report
System:
The UNT Digital Library
Flight Tests of a Curtiss No. 838-1C2-18 Three-Blade Propeller Having Trailing-Edge Extensions
"Flight tests to determine propeller performance have been made of a Curtiss No. 838-102-18 three-blade propeller having trailing-edge extensions on a Republic P-47D-28 airplane in climb and high speed. These tests are a part of a general propeller flight-test program at the Langley Laboratory of the National Advisory Committee for Aeronautics. Results of climb tests indicate that when power is changed from approximately 1475 horsepower at 2550 rpm (roughly normal power) to 2400 horsepower at 2700 rpm (approximately military power) there is a loss in propeller efficiency of 3 percent at an altitude of 7000 feet, and 4 percent at 21,000 feet" (p. 1).
Date:
July 16, 1947
Creator:
Gardner, John J.
Object Type:
Report
System:
The UNT Digital Library
Mollusca From the Miocene and Lower Pliocene of Virginia and North Carolina: Part 1. Pelecypoda
Abstract: A brief sketch of the stratigraphy of the Miocene of Virginia and the Miocene and Pliocene of North Carolina was prepared by Dr. W. C. Mansfield before his death in July 1939. His purpose was "to provide a background of formational nomenclature" for the taxonomic treatment of the molluscan faunas. The physical nature and distribution of the upper Tertiary formations within those States are discussed, characteristic sections given, and diagnostic molluscan species listed. Part 1 of the systematic report covers the Pelecypoda. A monographic treatment is not attempted, but 132 previously known species are considered, and 62 new species and subspecies are described and figured.
Date:
1943
Creator:
Gardner, Julia Anna
Object Type:
Report
System:
The UNT Digital Library
Theoretical analysis of the motions of an aircraft stabilized in roll by a displacement-response, flicker-type automatic pilot
Report presenting a general analysis that allows the rolling motions of an aircraft using a displacement-response, flicker-type automatic pilot to be determined. The system is not ideal for many stabilization problems due to inherent residual oscillations, but it offers a simple and economical solution in situations in which steady state oscillations are not a problem. Results regarding some general remarks, transient and steady states, stabilization boundaries, amplitude equations, and period equations are provided.
Date:
July 7, 1948
Creator:
Curfman, Howard J., Jr. & Gardner, William N.
Object Type:
Report
System:
The UNT Digital Library
Flight Investigation to Determine the Hinge Moments of a Beveled-Edge Aileron on a 45 Degree Sweptback Wing at Transonic and Low Supersonic Speeds
Report discussing testing of a model of the pilotless aircraft RM-1 to measure aileron hinge moments in flight in order to determine the reason for loss of roll stabilization at supercritical speeds in flight. The aileron was found to become quickly underbalanced over the full deflection range at supercritical speeds. Information about the general flight behavior, aileron hinge moments, and roll stabilization of the model is provided.
Date:
November 12, 1947
Creator:
Gardner, William N. & Curfman, Howard J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Report on the Carpenter Ridge District, Dolores Plateau Area, Colorado
A report on the survey of ore deposits in the Carpenter Ridge District, Dolores Plateau Area, Colorado.
Date:
January 1946
Creator:
Miller, Gardner B.
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
Observations on an aileron-flutter instability encountered on a 45 degree swept-back wing in transonic and supersonic flight
Report presenting a flight test of a supersonic research pilotless aircraft in which large-amplitude aileron oscillations, most likely aileron compressibility flutter, were encountered in the transonic and supersonic speed ranges. Results regarding power-on flight and coasting flight are provided.
Date:
April 11, 1947
Creator:
Pitkin, Marvin; Gardner, William N. & Curfman, Howard J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Linear Theory of Boundary Effects in Open Wind Tunnels With Finite Jet Lengths
"In the first part, the boundary conditions for an open wind tunnel (incompressible flow) are examined with special reference to the effects of the closed entrance and exit sections. In the second part, solutions are derived for four types of two-dimensional open tunnels, including one in which the pressures on the two free surfaces are not equal. In the third part, a general method is given for calculating the boundary effect in an open circular wind tunnel of finite jet length" (p. 509).
Date:
December 20, 1948
Creator:
Katzoff, S.; Gardner, Clifford S.; Diesendruck, Leo & Eisenstadt, Bertram J.
Object Type:
Report
System:
The UNT Digital Library
Linear theory of boundary effects in open wind tunnels with finite jet lengths
Report in two parts: one examines the boundary conditions for an open wind tunnel with special references to the effects of the closed entrance and exit sections, while the other derives solutions of four types of two-dimensional open tunnels, including one in which the pressures on the two free surfaces are not equal.
Date:
March 1949
Creator:
Katzoff, Samuel; Gardner, Clifford S.; Diesendruck, Leo & Eisenstadt, Bertram J.
Object Type:
Report
System:
The UNT Digital Library
Open-Cut Metal Mining
Report discussing open-cut mining at the metal mines of the United States. It is an applicable method to flat-lying mineral deposits relatively near the surface.
Date:
1941
Creator:
Gardner, E. D. & Mosier, McHenry
Object Type:
Report
System:
The UNT Digital Library
Study by the Prandtl-Glauert method of compressibility effects and critical Mach number for ellipsoids of various aspect ratios and thickness ratios
From Summary: "By the use of a form of the Prandtl-Glauert method that is valid for three-dimensional flow problems, the value of the maximum incremental velocity for compressible flow about thin ellipsoids at zero angle of attack is calculated as a function of the Mach number for various aspect ratios and thickness ratios. The critical Mach numbers (within the accuracy of the Prandtl-Glauert method) of the various ellipsoids are also determined. The results indicate an increase in critical Mach number with decrease in aspect ratio which is large enough to explain experimental results on low-aspect-ratio wings at zero lift."
Date:
January 1949
Creator:
Hess, Robert V. & Gardner, Clifford S.
Object Type:
Report
System:
The UNT Digital Library
Strip Cropping for War Production
"In the nation's effort to produce adequate quantities of all agricultural products to meet the war needs of the United Nations, conservation assumes added importance. Advancements in the management of croplands to conserve soil and moisture, which have come about in recent years as a result of experimentation and the experiences of many farmers, show that conservation increases crop yields. Strip cropping is one of the conservation practices. In its various forms and patterns, it is applicable to a large area of the United States. With the farmer rests the major responsibility of obtaining conservation on the land. Each farmer should examine for himself the need of strip cropping his cultivated land and in doing so should find the information contained in this bulletin helpful. The kinds of strip cropping, the factors influencing their use, methods of application, value in conserving soil and moisture, and the adaptation of strip cropping to the northeastern and north-central, the southeastern and western Gulf, the Great Plains, and the far Western States are discussed." -- p. ii
Date:
1943
Creator:
Tower, Harold E. & Gardner, Harry H.
Object Type:
Pamphlet
System:
The UNT Digital Library
Production of Mesons by the 184-inch Berkeley Cyclotron
The authors have observed tracks which they believe to be due to mesons in photographic plates placed near a target bombarded by 380 Mev alpha particles. For a 10-minute exposure in the cyclotron, about 50 meson tracks are found along the 3-inch edge of a photographic plate. The mass has been determined by measuring the bending in the magnetic field and the range in emulsion. From the first 50 meson tracks measured they find a mass of 313 {+-} 16 electron masses. It is highly probable that these mesons are the heavy mesons described by Lattes, Occhialini, and Powell.
Date:
January 1, 1948
Creator:
Gardner, Eugene & Lattes, C. M. G.
Object Type:
Article
System:
The UNT Digital Library
Mollusca From the Miocene and Lower Pliocene of Virginia and North Carolina: Part 2. Scaphopoda and Gastropoda
Introduction: Part 2 of the Systematic Report continues and concludes the study of the Mollusca from the Miocene and lower Pliocene of Virginia and North Carolina. One hundred and nineteen species, only a fraction of the known fauna, are reviewed and 66 additional species are described and figured. (See faunal chart, pp. 180-183.) The report upon the gastropods suffers from the same shortcomings obvious in the work on the pelecypods. Most of the material is from old collections made before the importance of the exact placing of the fossil locality both areally and vertically was recognized. Many of the citations of outcrops are vague and the sections generalized. Detailed field studies, particularly on the zoning of the Yorktown formation in southern Virginia and northern North Carolina, were begun later by Wendell P. Mansfield, but he died in the summer of 1939 before the completion of the work.
Date:
1948
Creator:
Gardner, Julia Anna & Mansfield, Wendell C.
Object Type:
Report
System:
The UNT Digital Library
Determination of Induced Velocity in Front of an Inclined Propeller by a Magnetic-Analogy Method
Report presenting the horizontal and vertical components of the induced velocity in front of an inclined propeller in a horizontal stream obtained by a magnetic-analogy method. The problem was formulated in terms of the linear theory of the acceleration potential of an incompressible nonviscous fluid.
Date:
February 1946
Creator:
Gardner, Clifford S. & LaHatte, James A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Infrared Spectrum of Benzene
From abstract: "Benzene shows weak absorption bands in the 3 aliphatic C-Z region of the spectrum. The peaks of these bands are at 3.439, 3.459, 3.504, and 3.545."
Date:
1946
Creator:
Flanagan, John; Gardner, R.; McKee, Frances & Schlegel, Richard, 1913-
Object Type:
Report
System:
The UNT Digital Library
Progress Report for October 1947, Physics Section
This summary discusses the following topics: (1) 184-inch cyclotron program; (2) a 60-inch cyclotron program; (3) synchrotron program; (4) Linear accelerator program; (5) Experimental physics, experiments with the 184-inch cyclotron, fast neutron scattering, and neutron-proton scattering; (6) Theoretical physics; and (7) isotope research program.
Date:
October 1, 1947
Creator:
Brobeck, W. M.; Hamilton, J. G.; Martin, M.; Alvarez, L. W.; Thornton, R. L.; Serber, R. et al.
Object Type:
Report
System:
The UNT Digital Library
Investigations of the parasites of Popillia japonica and related scarabaeidae in the Far East from 1929 to 1933, inclusive.
Describes the results of scientific research of parasites of the Japanese beetle at various stages of the beetle life cycle. The studies were carried out from 1929 to 1933 in Japan, Chosen (Korea), India, and Taiwan.
Date:
October 1940
Creator:
Gardner, T. R. (Theodore Roosevelt), b. 1899 & Parker, L. B. (Lawrence Bemis), 1901-
Object Type:
Book
System:
The UNT Digital Library
Coals of Chile
From Introduction: "The purpose of this investigation was to determine whether the coal from beds mined in the Schwager and Lota mines will produce metallurgical coke suitable for use in the blast furnaces at the proposed steel plant at Conception, and whether the quality of the lower-rank coals from other areas in Chile, especially those in Magallanes, where the large coal reserves of Chile appear to exist; can be improved by processing."
Date:
1948
Creator:
Toenges, Albert L.; Kelly, Leon W.; Davis, J. D.; Reynolds, D. A.; Fraser, Thomas; Crentz, W. L. et al.
Object Type:
Report
System:
The UNT Digital Library
Calculation of the Effect of Thrust-Axis Inclination on Propeller Disk Loading and Comparison With Flight Measurements
Note presenting an analysis based on simple geometry of the effect of thrust-axis inclination on propeller disk loading. Calculations are in excellent agreement with available flight measurements, so that the analysis is indicated to be adequate for predicting the primary effects of inclination. Because of the possible large effects of wing and fuselage interference, flow angles at the propeller should be determined by survey for most accurate results.
Date:
October 1948
Creator:
Vogeley, A. W.
Object Type:
Report
System:
The UNT Digital Library
Pressure Distributions Over a Wing-Fuselage Model at Mach Numbers of 0.4 to 0.99 and at 1.2
Report presenting pressure distributions over a prolate spheroid of fineness ratio 6 and over a combination of this body with an NACA 65-010 wing section for a range of Mach numbers. Results regarding wall and sting interference, nature of flow over a model in the transonic region, development of supersonic flow from subsonic flow, and a comparison of experimental and theoretical flow at subsonic stream Mach numbers are provided.
Date:
November 3, 1948
Creator:
Matthews, Clarence W.
Object Type:
Report
System:
The UNT Digital Library
A comparison of the experimental subsonic pressure distributions about several bodies of revolution with pressure distributions computed by means of the linearized theory
Report presenting an analysis of the effects of compressibility on the pressure coefficients of several bodies of revolution by comparing experimentally determined pressure coefficients with corresponding pressure coefficients calculated by the use of linearized equations of compressible flow. The results indicated that the theoretical methods predict the subsonic pressure-coefficient changes over the central portion of the body but do not predict the pressure-coefficient changes near the nose.
Date:
September 12, 1949
Creator:
Matthews, Clarence W.
Object Type:
Report
System:
The UNT Digital Library