Collection
Texas Patents
543
Technical Report Archive and Image Library
143
National Advisory Committee for Aeronautics Collection
125
USDA Farmers' Bulletins
35
USGS Topographic Map Collection
27
Government Documents A to Z Digitization Project
12
The Federal Reporter
8
Texas Soil Surveys
4
United States Experiment Station Record
4
Texas State Publications
2
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Serial/Series Title
NACA Technical Memorandums
52
NACA Technical Notes
46
NACA Technical Reports
26
Farmers' bulletin (United States. Dept. of Agriculture)
24
United States Bureau of Mines Reports
13
30 Minute Series
12
Farmers' bulletin (United States. Department of Agriculture)
11
National reporter system. United States series
8
The Federal Reporter
8
15 Minute Series (Topographic)
5
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The 300 H.P. Benz Aircraft Engine
This report provides a description of the Benz 300 H.P. aircraft engine containing 12 cylinders placed at a 60° angle. It includes a detailed description of the development of the constructional points, particularly the cylinders, pistons, and connecting rods, as well as the engine fitting, lubrication, oil pumps, bearings, oil tank, fuel pump, carburetors, and cooling system. There are seven pages of illustrative figures at the end of the report.
Date:
January 1921
Creator:
Heller, A.
Object Type:
Report
System:
The UNT Digital Library
N.A.C.A. Langley field wind tunnel apparatus: The tilting manometer
A description is given of a tilting manometer designed to meet the requirements of a manometer for use in the wind tunnel at the Langley Memorial Aeronautical Laboratory. This gauge was designed to meet the requirements of a manometer in use in connection with a static pressure plate to indicate the wind speed in the tunnel. The requirements are noted. The sensitivity of the gauge must be made inversely proportional to the pressure to be measured. The gauge must be accurately and quickly set for any desired pressure.
Date:
January 1921
Creator:
Norton, F. H. & Bacon, D. L.
Object Type:
Report
System:
The UNT Digital Library
Accelerations in flight
This report deals with the accelerations obtained in flight on various airplanes at Langley Field for the purpose of obtaining the magnitude of the load factors in flight and to procure information on the behavior of an airplane in various maneuvers. The instrument used in these tests was a recording accelerometer of a new type designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists of a flat steel spring supported rigidly at one end so that the free end may be deflected by its own weight from its neutral position by any acceleration acting at right angles to the plane of the spring. This deflection is measured by a very light tilting mirror caused to rotate by the deflection of the spring, which reflected the beam of light onto a moving film. The motion of the spring is damped by a thin aluminum vane which rotates with the spring between the poles of an electric magnet. Records were taken on landings and takeoffs, in loops, spins, spirals, and rolls.
Date:
1921
Creator:
Norton, F. H. & Allen, E. T.
Object Type:
Report
System:
The UNT Digital Library
Accelerometer design
In connection with the development of an accelerometer for measuring the loads on airplanes in free flight a study of the theory of such instruments has been made, and the results of this study are summarized in this report. A portion of the analysis deals particularly with the sources of error and with the limitations placed on the location of the instrument in the airplane. The discussion of the dynamics of the accelerometer includes a study of its theoretical motions and of the way in which they are affected by the natural period of vibration and by the damping, together with a report of some experiments on the effect of forced vibrations on the record.
Date:
1921%
Creator:
Norton, F. H. & Warner, Edward P.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Characteristics of Aerofoils
The object of this report is to bring together the investigations of the various aerodynamic laboratories in this country and Europe upon the subject of aerofoils suitable for use as lifting or control surfaces on aircraft. The data have been so arranged as to be of most use to designing engineers and for the purposes of general reference. The absolute system of coefficients has been used, since it is thought by the National Advisory Committee for Aeronautics that this system is the one most suited for international use, and yet is one for which a desired transformation can be easily made. For this purpose a set of transformation constants is included in this report.
Date:
1921~
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Alfalfa.
A guide to growing and using alfalfa on the farm. Includes recommendations for different regions of the United States.
Date:
1921
Creator:
United States. Department of Agriculture.
Object Type:
Book
System:
The UNT Digital Library
Analysis of Wing Truss Stresses Including the Effect of Redundancies
Report discusses airplane wing trusses are generally designed to contain redundant members (stagger wires and external drag wires) which, according to common practice, are not taken into account in calculations, so as to simplify the stress analysis by rendering the structure statically determinate. A more accurate method, in which the redundancies are included, involves a solution by means of Castigliano's method of least work. For the purpose of demonstrating the practical application of the method of least work this report presents examples for stresses of several cases of loading worked out for a structure similar to that of the Curtiss JN-4h.
Date:
1921%
Creator:
Warner, E. P. & Miller, R. G.
Object Type:
Report
System:
The UNT Digital Library
Angles of Attack and Air Speeds During Maneuvers
From Introduction: "The following report was prepared at the Langley Memorial Aeronautical Laboratory of the National Advisory Committee for Aeronautics, as it seemed desirable that there should be some study of the attitude assumed by an airplane, and more particularly of its motion with respect to surrounding air when maneuvering, either in ordinary turns, spirals, climbs, and dives, or in those more spectacular feats commonly known as stunts. It is important to secure this information, among other reasons, in order ti have definite knowledge as to the distribution of load on the wings, and so to furnish the basis for improved accuracy in stress analysis."
Date:
1921~
Creator:
Warner, E. P. & Norton, F. H.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the National Advisory Committee for Aeronautics (6th). Administrative Report Including Technical Reports Nos. 83 to 110
Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, House of Representatives bill 14061, a copy of the bill introduced to the House of Representatives to regulate air navigation, and a compilation of technical reports produced.
Date:
1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Anson Sheet
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 1:125000
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Austin Sheet
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 1:125000
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Baker Flat 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 1:31680
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Beautifying the Farmstead
Revised edition. Report giving practical ways for families to beautify farmsteads. Contains sections on design, locations of buildings, walkways, driveways, lawns, trees and other plants.
Date:
1921
Creator:
Mulford, Furman Lloyd, b. 1869
Object Type:
Pamphlet
System:
The UNT Digital Library
Beef Production in the Corn Belt
This bulletin discusses beef production in the Corn Belt of the United States with special regard to feed preparation, cattle selection, and methods for fattening cattle.
Date:
1921
Creator:
Black, W. H. (William Henry), 1888-1949
Object Type:
Pamphlet
System:
The UNT Digital Library
The Beet Leaf-Beetle and Its Control
Report discussing the beet leaf-beetle, which is common in the Rocky Mountain region. Discussion include physical appearance, geographic distribution, life cycle, affected plants, and methods of control.
Date:
1921
Creator:
Chittenden, F. H. (Frank Hurlbut), 1858-1929
Object Type:
Pamphlet
System:
The UNT Digital Library
Bellaire 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 1:31680
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Bibliography of Petroleum and Allied Substances in 1918
From Introduction: "This bulletin is the fourth in the series of petroleum bibliographies being published by the Bureau of Mines, the preceding, Bulletins 149, 165, and 180, being complications for the years 1915, 1916, and 1917, respectively. In this bulletin the same general plan has been followed in arranging the references, but a few changes and additions have been made in classification, the more important changes being in the classes "Geology and Origin" and "Refining and Refineries." During the year German periodicals were not available, and as in the bibliography for 1917, references to articles in foreign journals that were not available have been taken from other sources and credit given to those sources."
Date:
1921
Creator:
Burroughs, E. H.
Object Type:
Report
System:
The UNT Digital Library
Blanco Sheet
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 1:125000
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Bronte 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 1:31680
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
The Calculated Performance of Airplanes Equipped With Supercharging Engines
In part one of this report are presented the theoretical performance curves of an airplane engine equipped with a supercharging compressor. In predicting the gross power of a supercharging engine, the writer uses temperature and pressure correction factors based on experiments made at the Bureau of Standards (NACA report nos. 45 and 46).. Part two of this report presents an estimation of the performance curves of an airplane fitted with a supercharging engine.
Date:
1921
Creator:
Kemble, E. C.
Object Type:
Report
System:
The UNT Digital Library
Cleburne Sheet
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 1:125000
Date:
1921
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Combination Furnace and Cook-Stove
Patent for combination furnace and cook-stove designed to burn charcoal and conserve fuel.
Date:
1921-96-28
Creator:
Weaver, Bertha H.
Object Type:
Patent
System:
The Portal to Texas History
Community Bird Refuges
Report explaining how communities may establish bird refuges. Because birds eat injurious insects and provide aesthetic value to communities, it is desirable to increase their numbers in most communities. Bird refuges may be established on farms, at roadsides, in parks and fairgrounds, at schools and colleges, in cemeteries, and at reservoirs.
Date:
1921
Creator:
McAtee, W. L. (Waldo Lee), 1883-1962
Object Type:
Pamphlet
System:
The UNT Digital Library
The Corn Earworm As an Enemy of Vetch
"Vetch, which has become an important forage crop throughout the Southeastern States, needs protection from the same insect that works such havoc on corn and cotton. This corn earworm, or cotton bollworm, is the most serious pest that growers of vetch have to combat. The caterpillars eat both the foliage and the seed pods, and, if the infestation is heavy, make the crop practically worthless. Vetch intended for a hay crop generally escapes serious injury, as it is cut before the caterpillars are large enough to do much damage. It is recommended that a crop intended for seed be carefully watched and if the insects become numerous an insecticide be applied at once or the vetch cut for hay. Spraying, dusting, the use of poisoned-bran bait, and other control measures are discussed and summarized in this bulletin." -- p. 2
Date:
1921
Creator:
Luginbill, Philip & Beyer, A. H. (Adolph Harvey), b. 1882
Object Type:
Pamphlet
System:
The UNT Digital Library