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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Serial/Series Title
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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3,620 Matching Results
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The A.B.C. "Robin" (British): A Single-Seat Cabin Monoplane
Report discussing the A.B.C. Motors Robin, a single-seat monoplane that was built for pilot comfort, speed, and fuel efficiency. Information about the structural design, dimensions, weight, performance, and rough blueprints is included.
Date:
September 1929
Creator:
A. B. C. Motors
Object Type:
Report
System:
The UNT Digital Library
Utilization of Aluminum-Chlorid Residues.
Patent for "new and useful Improvements in the Utilization of Aluminum Chlorid Residues" (lines 6-7) including instructions and illustrations.
Date:
February 24, 1920
Creator:
Abbott, Lyle Stockton
Object Type:
Patent
System:
The Portal to Texas History
Combination Well-Packer and Setting-Tool.
Patent for a well packer and setting tool for the prevention of intermingling between oil and water in a well when used by itself or with other pipes. The invention allows for the packer to be set using the setting tool which can then be removed once the packer is in place.
Date:
January 6, 1920
Creator:
Abercrombie, Jamie & Dunman, Nesbit M.
Object Type:
Patent
System:
The Portal to Texas History
Variation in the Number of Revolutions of Air Propellers
Note describing the variation in the number of revolutions per minute and provides simple formulas that allow for advanced calculation to be made of the variation of propeller speed with variation of one or more dimensions of the propeller and allow the necessary corrections to be applied.
Date:
March 1923
Creator:
Achenbach, W.
Object Type:
Report
System:
The UNT Digital Library
Air forces on airfoils moving faster than sound
We are undertaking the task of computing the air forces on a slightly cambered airfoil in the absence of friction and with an infinite aspect ratio. We also assume in advance that the leading edge is very sharp and that its tangent lies in the direction of motion.
Date:
June 1925
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Drag measurements of two thin wing sections at different index values
It is stated that the index value 6000, as found in normal tests of wing sections with a 20 cm chord, falls in the same region where the transition of laminar to turbulent flow takes place on thin flat plates. It is to be expected that slightly cambered, thin wing sections will behave similarly. The following test of two such wing sections were made for the purpose of verifying this supposition.
Date:
June 1927
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Experiments on airfoils with trailing edge cut away
"Airfoils with their trailing edge cut away are often found on aircraft, as the fins on the hulls of flying boats and the central section of the wings for affording better visibility. It was therefore of some interest to discover the effect of such cutaways on the lift and drag and on the position of the center of pressure. For this purpose, systematic experiments were performed on two different airfoils, a symmetrical airfoil and an airfoil of medium thickness, with successive shortenings of their chords" (p. 1).
Date:
September 1927
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Recent experiments at the Gottingen Aerodynamic Institute
This report presents the results of various experiments carried out at the Gottingen Aerodynamic Institute. These include: experiments with Joukowski wing profiles; experiments on an airplane model with a built-in motor and functioning propeller; and the rotating cylinder (Magnus Effect).
Date:
July 1925
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Removing boundary layer by suction
"Through the utilization of the "Magnus effect" on the Flettner rotor ship, the attention of the public has been directed to the underlying physical principle. It has been found that the Prandtl boundary-layer theory furnishes a satisfactory explanation of the observed phenomena. The present article deals with the prevention of this separation or detachment of the flow by drawing the boundary layer into the inside of a body through a slot or slots in its surface" (p. 1).
Date:
January 1926
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Experiments With an Airfoil From Which the Boundary Layer Is Removed by Suction
"Our attempts to improve the properties of airfoils by removing the boundary layer by suction, go back to 1922. The object of the suction is chiefly to prevent the detachment of the boundary layer from the surface of the airfoil. At large angles of attack, such detachment prevents the attainment of the great lift promised by the theory, besides greatly increasing the drag, especially of thick airfoils. This report gives results of those experiments" (p. 1).
Date:
August 1926
Creator:
Ackeret, J.; Betz, A. & Schrenk, O.
Object Type:
Report
System:
The UNT Digital Library
Trombone.
Patent, including illustration, for "a musical instrument slide and is more particularly designated as a bearing or stocking for a trombone or other similar instruments in which it is desirable to provide a smooth bearing for the slidable part of the instrument" (page 1, lines 9-13).
Date:
February 17, 1920
Creator:
Ackley, William D.
Object Type:
Patent
System:
The Portal to Texas History
Boring-Tool.
Patent for "a boring tool for boring scarred and worn engine cylinders" (lines 14-15) that allows for more customization when cutting.
Date:
January 4, 1921
Creator:
Adams, George Reese.
Object Type:
Patent
System:
The Portal to Texas History
Gasoline Wash Furnace
Patent for a gasoline wash furnace designed for use in heating water for clothea
Date:
November 7, 1922
Creator:
Adams, James V.
Object Type:
Patent
System:
The Portal to Texas History
Standing Valve
Patent for a Standing Valve. This standing valve is designed to improve the way the fluids pump through oil and water wells. it also includes an improvement in the way the standing valve is secured to the wells. The new valve can also be easily replaced because of the materials it is composed of.
Date:
September 21, 1920
Creator:
Adams, Thomas M.
Object Type:
Patent
System:
The Portal to Texas History
Coal-Mine Fatalities in the United States, 1923
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1924
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Fatalities in the United States, 1924
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1925
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Fatalities in the United States, 1925
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1926
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Fatalities in the United States, 1926
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1927
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Fatalities in the United States, 1927
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1928
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1923
Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date:
1925
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1924
Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date:
1926
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1925
Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date:
1927
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1926
Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date:
1928
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1927
Report issued by the U.S. Bureau of Mines covering accidents that happened in metal mines located in the United States including statistics for injuries, fatalities, kinds and causes of accidents, and operational data, such as number of mine workers and shifts worked.
Date:
1929
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library