Collection
Texas Attorney General Opinions
1,228
Technical Report Archive and Image Library
176
National Advisory Committee for Aeronautics Collection
151
Government Documents A to Z Digitization Project
105
USDA Farmers' Bulletins
78
Texas State Publications
30
USGS Topographic Map Collection
17
World War Two Collection
7
Texas Soil Surveys
4
World War Poster Collection
4
10 More
Serial/Series Title
Farmers' bulletin (United States. Dept. of Agriculture)
69
NACA Technical Notes
46
NACA Technical Memorandums
41
NACA Technical Reports
27
Leaflet (United States. Department of Agriculture)
21
NACA Wartime Reports
19
NACA Special Reports
16
NACA Advanced Confidential Reports
15
15 Minute Series (Topographic)
14
United States Bureau of Mines Reports
14
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States
1,579 Matching Results
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Aerodynamic Characteristics of Horizontal Tail Surfaces
From Summary: "Collected data are presented on the aerodynamic characteristics of 17 horizontal tail surfaces including several with balanced elevators and two with end plates. Curves are given for coefficients of normal force, drag, and elevator hinge moment. A limited analysis of the results has been made. The normal-force coefficients are in better agreement with the lifting-surface theory of Prandtl and Blenk for airfoils of low aspect ratio than with the usual lifting-line theory. Only partial agreement exists between the elevator hinge-moment coefficients and those predicted by Glauert's thin-airfoil theory."
Date:
1940
Creator:
Silverstein, Abe & Katzoff, S.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic heating and the deflection of drops by an obstacle in an air stream in relation to aircraft icing
From Summary: "Two topics of interest to persons attempting to apply the heat method of preventing ice formation on aircraft are considered. Surfaces moving through air at high speed are shown, both theoretically and experimentally, to be subject to important aerodynamic heating effects that will materially reduce the heat required to prevent ice. Numerical calculations of the path of water drops in an air stream around a circular cylinder are given. From these calculations, information is obtained on the percentage of the swept area cleared of drops."
Date:
October 1940
Creator:
Kantrowitz, Arthur
Object Type:
Report
System:
The UNT Digital Library
Aerodynamics of Rotating-Wing Aircraft With Blade-Pitch Control
"In the present report, with the aid of the usual computation methods, a rotor is investigated the pitch of whose blades is capable of being controlled in such a manner that it varies linearly with the flapping angle. To test the effect of this linkage on the aircraft performance, the theory is applied to an illustrative example" (p. 1).
Date:
February 1940
Creator:
Pflüger, A.
Object Type:
Report
System:
The UNT Digital Library
Aguilares Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:62500
Date:
1940
Creator:
United States. Army. Corps of Engineers.
Object Type:
Map
System:
The Portal to Texas History
The Aileron as an Aid to Recovery From the Spin
From Introduction: "In order to afford a means of comparison and to obtain a clear understanding of the results, a study of the effects of normal angular deflections of the ailerons, with and against the spin, was included in the investigation. Ailerons deflected with the spin means that the ailerons are deflected with right aileron up and left aileron down in a right spin. The results of the investigation are discussed in this paper."
Date:
September 1940
Creator:
Neihouse, A. I.
Object Type:
Report
System:
The UNT Digital Library
Alfalfa varieties in the United States.
Describes the different types of alfalfa grown in the United States.
Date:
1940
Creator:
Westover, H. L. (Harvey Leroy)
Object Type:
Book
System:
The UNT Digital Library
Analysis and Prediction of Longitudinal Stability of Airplanes
From Introduction: "The present report presents the results of such an analysis as regards the longitudinal-stability and control characteristics of the various airplanes tested."
Date:
December 12, 1940
Creator:
Gilruth, R. R. & White, M. D.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Cylinder-Pressure-Indicator Diagrams Showing Effects of Mixture Strength and Spark Timing
"An investigation was made to determine the effect of mixture strength and of normal as well as optimum spark timing on the combustion, on the cylinder temperature, and on the performance characteristics of an engine. A single-cylinder test unit utilizing an air-cooled cylinder and a carburetor and operating with gasoline having an octane rating of 92 was used. The investigation covered a range of fuel-air ratios from 0.053 to 0.118. Indicator diagrams and engine-performance data were taken for each change in engine conditions" (p. 1).
Date:
August 1940
Creator:
Gerrish, Harold C. & Voss, Fred
Object Type:
Report
System:
The UNT Digital Library
An Analysis of the Stability of an Airplane With Free Controls
Report presents the results of an investigation made of the essentials to the stability of an airplane with free control surfaces.
Date:
August 15, 1940
Creator:
Jones, Robert T. & Cohen, Doris
Object Type:
Report
System:
The UNT Digital Library
Analysis of Wind-Tunnel Data on Directional Stability and Control
From Summary: "This paper does not attempt to establish criterions for directional stability and control; rather, the emphasis is placed on providing some basis for design to specified criterions. An example applying the design methods has been included."
Date:
September 1940
Creator:
Pass, H. R.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1939
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1939, activities, finance, honors, service reports, organizational leadership, and other information about scouting programs.
Date:
April 1, 1940
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Annual Report of the National Advisory Committee for Aeronautics (25th). Administrative Report Including Technical Report Nos. 645 to 680
Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date:
1940
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Apple blotch.
Describes the disease of apple blotch, how it spreads, and ways to control it.
Date:
1940
Creator:
Roberts, John W. (John William), 1882-1957. & Pierce, Leslie.
Object Type:
Book
System:
The UNT Digital Library
Apple Growing East of the Mississippi River.
Describes the various factors that should be taken into consideration when developing and maintaining apple orchards, including: types of soil, climate conditions, the selecting and handling of young trees, the use of fertilizers, methods of pruning and spraying, and methods of repelling pests.
Date:
July 1940
Creator:
Gould, H. P.
Object Type:
Book
System:
The UNT Digital Library
Apple-orchard renovation.
Describes various methods for maximizing the quality and output of apple orchards.
Date:
1940
Creator:
Gould, H. P.
Object Type:
Book
System:
The UNT Digital Library
Application of the Methods of Gas Dynamics to Water Flows With Free Surface 1: Flows With No Energy Dissipation
The application is treated in sufficient detail to facilitate as much as possible its application by the engineer who is less familiar with the subject. The present work was undertaken with two objects in view. In the first place, it is considered as a contribution to the water analogy of gas flows, and secondly, a large portion is devoted to the general theory of the two-dimensional supersonic flows.
Date:
March 1940
Creator:
Preiswerk, Ernst
Object Type:
Report
System:
The UNT Digital Library
Application of the Methods of Gas Dynamics to Water Flows With Free Surface 2: Flows With Momentum Discontinuities (Hydraulic Jumps)
In this paper an introduction to shock polar diagrams is given which then leads into an examination of water depths in hydraulic jumps. Energy loss during these jumps is considered along with an extended look at elementary solutions of flow. An experimental test set-up is described and the results presented.
Date:
March 1940
Creator:
Preiswerk, Ernst
Object Type:
Report
System:
The UNT Digital Library
An Approximate Method of Calculation of Relative Humidity Required to Prevent Frosting on Inside of Aircraft Pressure Cabin Windows, Special Report
This report has been prepare in response to a request for information from an aircraft company. A typical example was selected for the presentation of an approximate method of calculation of the relative humidity required to prevent frosting on the inside of a plastic window in a pressure type cabin on a high speed airplane. The results of the study are reviewed.
Date:
December 5, 1940
Creator:
Jones, Alun R.
Object Type:
Report
System:
The UNT Digital Library
An Autunite Deposit in the Rosamond Hills, Kern County, California
From introduction: An autunite deposit in the SW 1/4 sec. 25, T. 10 N., R. 13 W. San Bernardino meridian, was visited by F. M. Chace on May 6 and 15, 1950. The deposit is about 100 yards west of a north-south country road and is at an altitude of approximately 2,775 feet. The autunite-bearing tuffaceous sandstone strikes N. 35-40 W. and dips 20 -25 SW. It has been traced about 40 feet along the strike at the base of the outcrop and for about 20 feet up the dip. Insufficient work was done to give an accurate idea of the size of the deposit or to determine if other autunite-bearing beds are present.
Date:
August 1940
Creator:
Chace, F. M.
Object Type:
Report
System:
The UNT Digital Library
Bean Growing in Northern Idaho, Eastern Washington, and Eastern Oregon.
Describes best practices for profitable bean-growing in the northwestern United States.
Date:
1940
Creator:
Hunter, Byron, b. 1869
Object Type:
Book
System:
The UNT Digital Library
Biennial Report of the Texas Library and Historical Commission State Library: 1938-1940
The report given here is for the sixteenth biennium of the texas library and history commission.
Date:
September 1, 1940
Creator:
Texas Library and Historical Commission
Object Type:
Report
System:
The Portal to Texas History
Biology of the seed-corn maggot in the coastal plain of the South Atlantic states
Describes the seed-corn maggot of the south Atlantic states at different stages of life, its history, and its habits.
Date:
June 1940
Creator:
Reid, W. J. (William John), 1902- & Hall, D. G.
Object Type:
Book
System:
The UNT Digital Library
Black Walnut for Timber and Nuts.
A guide to growing black walnut trees for timber, nut crops, or ornamental use.
Date:
1940
Creator:
Mattoon, Wilbur R. (Wilbur Reed), 1875-1941 & Reed, C. A. (Clarence Arthur), 1880-1950
Object Type:
Book
System:
The UNT Digital Library
Blackleg : its nature, cause, and prevention.
Describes blackleg, a livestock disease. Explains how to recognize, treat, and prevent it.
Date:
1940
Creator:
Mohler, John R. (John Robbins), b. 1875
Object Type:
Book
System:
The UNT Digital Library