Collection
Technical Report Archive and Image Library
161
National Advisory Committee for Aeronautics Collection
124
USDA Farmers' Bulletins
29
Government Documents A to Z Digitization Project
20
USGS Topographic Map Collection
11
Texas State Publications
6
Texas Soil Surveys
6
United States Experiment Station Record
3
Boy and Girl Scout Annual Reports
2
United States Experiment Station Reports
2
3 More
Serial/Series Title
NACA Technical Memorandums
50
United States Bureau of Mines Reports
29
NACA Aircraft Circulars
26
Farmers' bulletin (United States. Dept. of Agriculture)
25
NACA Technical Notes
24
NACA Technical Reports
22
Technical paper (United States. Bureau of Mines)
8
7.5 Minute Series (Topographic)
7
National Bureau of Standards Reports
6
Bulletin (United States. Bureau of Mines)
4
30 More
Country
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222 Matching Results
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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
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
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
Quarry Accidents in the United States During the Calendar Year 1924
Report published by the U.S. Bureau of Mines which is a compilation of accidents in quarries located in the United States with data regarding the number and kinds of accidents as well as information about the mining operations (e.g., number of men employed, kinds of quarries, amount of work performed, etc.).
Date:
1926
Creator:
Adams, William W.
Object Type:
Report
System:
The UNT Digital Library
Accident-Severity Rates For Certain Metal Mines
Report issued by the U.S. Bureau of Mines on the severity of accidents in the metal-mine industry. 34 metal-mines documented the number and severity of all accidents over the course if one calendar year. This report includes tables.
Date:
September 1926
Creator:
Adams, William Waugh
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Fatalities in May, 1926
Report issued by the U.S. Bureau of Mines on the coal-mining related deaths in May, 1926. The 126 accidents are documented and categorized. The accidents are analyzed in order to prevent future accidents, and to implement safety procedures. This report includes tables.
Date:
June 1926
Creator:
Adams, William Waugh
Object Type:
Report
System:
The UNT Digital Library
A Résumé of the Advances in Theoretical Aeronautics Made by Max M. Munk
"In order to apply profitably the mathematical methods of hydrodynamics to aeronautical problems, it is necessary to make simplifications in the physical conditions of the latter. In a valuable paper presented by Dr. Max M. Munk, of the National Advisory Committee for Aeronautics, Washington, to the Delft Conference in April, 1924, these necessary simplifying assumptions are discussed in detail. It is the purpose of the present paper to present in as simple a manner as possible some of the interesting results obtained by Dr. Munk's methods" (p. 93).
Date:
1926
Creator:
Ames, Joseph S.
Object Type:
Report
System:
The UNT Digital Library
Experiments on Autorotation
This article deals principally with Professor Bairstow's experiments on autorotation, in which the wing is free to rotate about an axis in its plane of symmetry, which axis is parallel with the direction of the wind.
Date:
September 1926
Creator:
Anderlik, E.
Object Type:
Report
System:
The UNT Digital Library
The Gueydan, a New Middle Trtiary Formation From the Southwestern Coastal Plain of Texas
"The object of the present paper is to describe the general lithology and petrography of the Gueydan formation" (p. 7).
Date:
December 1, 1926
Creator:
Bailey, Thomas L.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
A Biological Survey of North Dakota
Summary of physiography and life zones and mammals of North Dakota.
Date:
December 1926
Creator:
Bailey, Vernon
Object Type:
Report
System:
The UNT Digital Library
Soil Survey of Reeves County, Texas
Text describes the climate, agriculture, soils, irrigation, and alkali of Reeves County, Texas.
Date:
1926
Creator:
Beck, M. W. (Miles Walter) & Strike, W. W. (Wendell William)
Object Type:
Book
System:
The Portal to Texas History
Designing Seaplane Hulls and Floats
Experimental data, such as the results of tank tests of models, render it possible to predict, at least in principle, as to how a hull or float of a given shape will comport itself. We will see further along, however, how uncertain these methods are and how they leave room for empiricism, which will reign for a long time yet in seaplane research bureaus.
Date:
August 1926
Creator:
Benoit
Object Type:
Report
System:
The UNT Digital Library
Small Concrete Construction on the Farm.
Describes how to plan and build small concrete structures on the farm.
Date:
May 1926
Creator:
Betts, M. C. (Morris Cotgrave), 1875-1936 & Miller, T. A. H. (Thomas Arrington Huntington), 1885-
Object Type:
Book
System:
The UNT Digital Library
Approximate Calculation of the Static Longitudinal Stability of Airplanes
It seems desirable to have some simple method for calculating quickly and with sufficient accuracy: 1) the correct position of the center of gravity; 2) the requisite tail-group dimensions; 3) and the course of the wing and tail-group moments. In out deductions, we will first replace the biplane (disregarding the effect of stagger, decalage and induced drag) by an equivalent monoplane, whose dimensions and position in space can be approximately determined in a simple manner.
Date:
November 1926
Creator:
Bienen, Theodor
Object Type:
Report
System:
The UNT Digital Library
The Stable Fly: How to Prevent Its Annoyance and Its Losses to Live Stock
Revised edition. Report discussing the stable fly and methods for controlling it. Topics discussed include its distribution, life cycle, and breeding habits as well as natural and artificial methods of control.
Date:
1926
Creator:
Bishopp, F. C. (Fred Corry), 1884-1970
Object Type:
Pamphlet
System:
The UNT Digital Library
Spindled and Hollow Spars
"The most usual method of arriving at the maximum amount of spindling or hollowing out permissible in the case of any particular spar section is by trial and error, a process which is apt to become laborious in the absence of good guessing - or luck. The following tables have been got out with the object of making it possible to arrive with certainty at a suitable section at the first attempt" (p. 1).
Date:
October 1926
Creator:
Blyth, J. D.
Object Type:
Report
System:
The UNT Digital Library
Board of Regents of the Texas State Teachers Colleges Biennial Report: 1924-1926
Biennial report of the Board of Regents of the Texas State Teachers Colleges discussing activities of state teachers' colleges and providing an overview of relevant statistics and financial information related to state funding.
Date:
1926
Creator:
Board of Regents of the Texas State Teachers Colleges
Object Type:
Report
System:
The Portal to Texas History
The Bowie-Gavin Process: Its Application to the Cracking of Tars and Heavy Oils, Also to the Recovery of Oil from Oil-Soaked Sands or Shales, or from Oil Shales
Technical paper issued by the Bureau of Mines over the Bowie-Gavin process. As stated in the introduction, "this paper describes a process and an apparatus designed to recover oil from such deposits" (p. 1). The results of experiments conducted using this process are discussed. This paper includes tables, illustrations, and photographs.
Date:
1926
Creator:
Bowie, C. P.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1924
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1924, activities, organizational leadership, and other information about scouting programs.
Date:
1926
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Annual Report of the Boy Scouts of America: 1925
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1926, activities, finance, organizational leadership, and other information about scouting programs.
Date:
June 5, 1926
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
The Lateral Failure of Spars
It was concluded that after the critical span or depth-breadth ratio has been reached, the modulus of rupture varies approximately inversely as the first power of the span and of the depth-breadth ratio. The direction of the lateral deflection is alternate between successive supports. For this reason, we believe that rib spacing along the spar is more important in reducing lateral deflection than the distance between supports at the strut points.
Date:
March 1926
Creator:
Bromley, Stevens & Robinson, William H., Jr.
Object Type:
Report
System:
The UNT Digital Library
The fundamental principles of high-speed semi-diesel engines. Part 1: a general discussion of the subject of fuel injection in diesel engines and detailed descriptions of many types of injection nozzles
Three questions relating to the technical progress in the utilization of heavy oils are discussed. The first question considers solid injection in high-speed automobile engines, the second concerns the development of the hot-bulb engine, and the third question relates to the need for a more thorough investigation of the processes on which the formatation of combustible, rapidly-burning mixtures depend.
Date:
April 1926
Creator:
Büchner
Object Type:
Report
System:
The UNT Digital Library
The fundamental principles of high-speed semi-diesel engines. Part 2: a discussion of the semi-diesel principle and its application to various types of solid-injection engines
Three high-speed semi-diesel engines are examined through the use of indicator diagrams. Different fuel nozzles and fuels are investigated and conclusions are drawn.
Date:
April 1926
Creator:
Büchner
Object Type:
Report
System:
The UNT Digital Library