Collection
Technical Report Archive and Image Library
1,563
National Advisory Committee for Aeronautics Collection
1,298
Texas Patents
1,240
USDA Farmers' Bulletins
337
USGS Topographic Map Collection
292
Government Documents A to Z Digitization Project
163
Texas State Publications
43
Texas Soil Surveys
40
The Federal Reporter
23
United States Experiment Station Record
22
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NACA Technical Memorandums
548
NACA Technical Notes
331
NACA Technical Reports
300
Farmers' bulletin (United States. Dept. of Agriculture)
256
United States Bureau of Mines Reports
208
NACA Aircraft Circulars
106
Farmers' bulletin (United States. Department of Agriculture)
80
15 Minute Series (Topographic)
67
30 Minute Series
66
Bulletin (United States. Bureau of Mines)
38
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Degree Department
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3,620 Matching Results
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The Bernard 20 C.1 (French): A Single-Seat Pursuit Monoplane
Circular presenting a description of the Bernard 20 C.1, which is made of wood and has four main parts: a one-piece wing with a fuselage in the middle, a rear section with the tail surfaces, an engine mount, and a landing gear.
Date:
July 1929
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Cigar-tobacco production in Pennsylvania.
Discusses the methods for tobacco farming in Pennsylvania. Includes cropping systems, cultural operations, and plant diseases.
Date:
July 1929
Creator:
Olson, Otto
Object Type:
Book
System:
The UNT Digital Library
Method and Cost of Mining the Thick Freeport Coal in a Second Western Pennsylvania Mine
From introduction: The purpose of this paper is to present a detailed description of the methods employed and the equipment used, with the results obtained in the operation of this mine in the thick Freeport bed on the northern end of the field, near the Alleghegny-Butler county line in western Pennsylvania. It may be classed as a captive mine, as the largest portion of the product is consumed at the by-product plants of the parent company
Date:
July 1929
Creator:
Paul, James Washington & Tomlinson, H.
Object Type:
Report
System:
The UNT Digital Library
Torsional Rigidity of Cantilever Wings With Constant Spar and Rib Sections
"The present paper treats less of the effect of the union (of spars and ribs, namely, the reduction of the bending moment at the fixed ends of the spars) than of its influence on the torsional rigidity of the wing. The calculations are carried out for a two-spar wing of constant cross section, in which the ribs are replaced by a continuous member of constant rigidity" (p. 1).
Date:
July 1929
Creator:
Gabrielli, Giuseppe
Object Type:
Report
System:
The UNT Digital Library
The Use of Wheel Brakes on Airplanes
The results of tests to determine the effect of wheel brakes on the landing run of an airplane under conditions of load and at various wind velocities are presented.
Date:
July 1929
Creator:
Carroll, Thomas & DeFrance, Smith J.
Object Type:
Report
System:
The UNT Digital Library
Warehouse Laws of the State of Texas and List of State Bonded Warehouses
Agriculture bulletin printing selected excerpts of Texas laws related to the state bonding of warehouses and markets, along with a list of warehouses under bond in the state at the time of publication, organized by county.
Date:
July 1929
Creator:
Davis, Fred W.
Object Type:
Book
System:
The Portal to Texas History
Wild Garlic and Its Control.
Describes wild garlic and a few methods for controlling its growth.
Date:
July 1929
Creator:
United States. Department of Agriculture.
Object Type:
Book
System:
The UNT Digital Library
Wind Tunnel Pressure Distribution Tests on a Series of Biplane Wing Models Part I: Effects of Changes in Stagger and Gap
This report is on the changes in forces on each wing of a biplane cellule when either the stagger or the gap is varied. Since each test was carried up to a 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.
Date:
July 1929
Creator:
Knight, Montgomery & Noyes, Richard W.
Object Type:
Report
System:
The UNT Digital Library
Wings With Nozzle-Shaped Slots
Even before the publication of the results of the Gottingen experiments on the removal of the boundary layer by suction, experiments with nozzle-slotted wings were begun. A report of those experiments will be given here. Taken collectively, the experiments show that, as regards increasing the lift values, the effect of the air flowing from the nozzle-shaped slots is similar to the effect produced in the case of ordinary slotted wings. The high lift values are attained, however, at the smaller angles of attack employed in ordinary flight.
Date:
July 1929
Creator:
Katzmayr, Richard
Object Type:
Report
System:
The UNT Digital Library
Correcting Engine Tests for Humidity
Note presenting tests using a multicylinder engine to determine the effect that atmospheric humidity has on some phases of engine performance. Three test series with different types of fuel were carried out. The results indicate that failure to allow for the effect of differences in atmospheric humidity may introduce errors as great as would be occasioned by failure to allow for changes in barometric pressure.
Date:
June 1929
Creator:
Brooks, Donald B.
Object Type:
Report
System:
The UNT Digital Library
Crank Case Scavenging of Two-Stroke-Cycle Engines
This report presents the results of tests on two-stroke-cycle Diesel engines to determine the efficiency of the crank case scavenging pump. It was determined that efficiencies were between 95 and 100%.
Date:
June 1929
Creator:
List, Hans
Object Type:
Report
System:
The UNT Digital Library
Force Measurements on Airplanes
The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
Date:
June 1929
Creator:
Seewald, F.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Atomization in Carburetors
This report presents methods by which it is possible to determine, in a simple manner, both pressure atomization and carburetor atomization.
Date:
June 1929
Creator:
Sauter, J.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the Effect of the Fuselage on the Wing of a Low-Wing Monoplane
Memorandum presenting the mutual action of wing and fuselage, which greatly affects the construction of airplanes. A description of systematic wind-tunnel tests that were made to answer that question is provided. Other tests deal with the transition from fuselage to wing root, which, if inadequate on low-wing monoplanes, may become dangerous by causing the air flow to separate at the wing root.
Date:
June 1929
Creator:
Muttray, H.
Object Type:
Report
System:
The UNT Digital Library
Report of the Twenty-Second National Conference on Weights and Measures, 1929
Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Date:
June 1929
Creator:
United States. National Bureau of Standards.
Object Type:
Report
System:
The UNT Digital Library
The "Potez 33" Military Airplane (French)
Circular describing the Potez 33, which is a military airplane that can be used for other purposes such as training pilots and as a messenger airplane due to its maneuverability and low landing speeds. A description of the controls, components, potential uses, characteristics, performance, drawings, and photographs are provided.
Date:
June 1929
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Pressure Distribution on a Slotted R.A.F. 31 Airfoil in the Variable Density Wind Tunnel
Measurements were made in the variable density wind tunnel to determine the pressure distribution over one section of a R.A.F. 31 airfoil with a leading edge slot fully open. To provide data for the study of scale effect on this type of airfoil, the tests were conducted with air densities of approximately one and twenty atmospheres.
Date:
June 1929
Creator:
Jacobs, Eastman N.
Object Type:
Report
System:
The UNT Digital Library
Strength of Tubing Under Combined Axial and Transverse Loading
Note presenting a systematic study of the strength of duralumin and chrome-molybdenum steel round tubing in combined transverse and axial loading. A description of the formulas that are the groundwork for the study as well as the results of the tests are provided.
Date:
June 1929
Creator:
Tuckerman, L. B.; Petrenko, S. N. & Johnson, C. D.
Object Type:
Report
System:
The UNT Digital Library
Termites in Buildings.
Describes the characteristics of termites, the damage they cause to buildings, and methods of control.
Date:
June 1929
Creator:
Snyder, Thomas Elliott, b. 1885
Object Type:
Book
System:
The UNT Digital Library
Trembles.
Describes the trembles, a milk sickness which afflicts cows; includes information regarding causes, transmission to uninfected animals, remedies, and prevention.
Date:
June 1929
Creator:
Marsh, C. Dwight (Charles Dwight)
Object Type:
Book
System:
The UNT Digital Library
Varieties of hard red winter wheat.
Describes different types of hard red winter wheat and where it grows in the United States.
Date:
June 1929
Creator:
Clark, J. Allen (Jacob Allen), b. 1888 & Quisenberry, Karl S.
Object Type:
Book
System:
The UNT Digital Library
Tests of large airfoils in the propeller research tunnel, including two with corrugated surfaces
This report gives the results of the tests of seven 2 by 12 foot airfoils (Clark Y, smooth and corrugated, Gottingen 398, N.A.C.A. M-6, and N.A.C.A. 84). The tests were made in the propeller research tunnel of the National Advisory Committee for Aeronautics at Reynolds numbers up to 2,000,000. The Clark Y airfoil was tested with three degrees of surface smoothness. Corrugating the surface causes a flattening of the lift curve at the burble point and an increase in drag at small flying angles.
Date:
May 24, 1929
Creator:
Wood, Donald H.
Object Type:
Report
System:
The UNT Digital Library
The Gaseous Explosive Reaction at Constant Pressure: The Reaction Order and Reaction Rate
The data given in this report covers the explosive limits of hydrocarbon fuels. Incidental to the purpose of the investigation here reported, the explosive limits will be found to be expressed for the condition of constant pressure, in the fundamental terms of concentrations (partial pressures) of fuel and oxygen.
Date:
May 9, 1929
Creator:
Stevens, F. W.
Object Type:
Report
System:
The UNT Digital Library
The effect of cowling on cylinder temperatures and performance of a Wright J-5 engine
This report presents the results of tests conducted to determine the effect of different amounts and kinds of cowling on the performance and cylinder temperatures of a standard Wright J-5 engine. These tests were conducted in conjunction with drag and propeller tests in which the same cowlings were used. Four different cowlings were investigated varying from the one extreme of no cowling on the engine to the other extreme of the engine completely cowled and the cooling air flowing inside the cowling through an opening in the nose and out through an annular opening at the rear of the engine. Each cowling was tested at air speeds of approximately 60, 80, and 100 miles per hour.
Date:
May 2, 1929
Creator:
Schey, Oscar W. & Biermann, Arnold E.
Object Type:
Report
System:
The UNT Digital Library