Resource Type
Collection
Technical Report Archive and Image Library
185
National Advisory Committee for Aeronautics Collection
150
USGS Topographic Map Collection
27
Government Documents A to Z Digitization Project
14
USDA Farmers' Bulletins
13
Texas State Publications
8
Texas Soil Surveys
6
Texas House of Representatives Journals
2
Texas Senate Journals
2
Government Documents General Collection
2
4 More
Serial/Series Title
NACA Technical Memorandums
54
NACA Technical Reports
40
NACA Technical Notes
30
NACA Aircraft Circulars
25
United States Bureau of Mines Reports
22
15 Minute Series (Topographic)
13
Farmers' bulletin (United States. Dept. of Agriculture)
12
7.5 Minute Series (Topographic)
11
United States Geological Survey Reports
10
Leaflet (United States. Department of Agriculture)
6
34 More
States
256 Matching Results
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The 1929 Rhon soaring-flight contest
The limitation of the 1929 contest to performance gliders necessitated the establishment of a formula which would make it possible to distinguish between performance gliders and school and training gliders. The sinking speed was therefore adopted as the basis for such a distinction, and the requirement was made that the sinking speed of a performance glider should not exceed 0.8 m/s. The rest of the report details the different entries with regard to design and performance.
Date:
April 1930
Creator:
Lippisch, Alexander
Object Type:
Report
System:
The UNT Digital Library
Accelerated Laboratory Test for Determination of Slacking Characteristics of Coal
Report issued by the U.S. Bureau of Mines on laboratory testing developed to measure the slacking of coals. Testing methods and results are presented. This report includes tables and graphs.
Date:
November 1930
Creator:
Fieldner, Arno Carl; Selvig, W. A. & Frederic, W. H.
Object Type:
Report
System:
The UNT Digital Library
An Accurate Method of Measuring the Moments of Inertia of Airplanes
From Summary: "This note contains a description of an improved apparatus and procedure used by the NACA for determining the moments of inertia of airplanes. The method used, based on the pendulum theory, is similar to that previously used, but a recent investigation of its accuracy has resulted in the improvements described herein. The error, when using the new apparatus and procedure, has been found to be of the order of 1 per cent."
Date:
October 1930
Creator:
Miller, M. P.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Characteristics of Airfoils 6: Continuation of Reports Nos. 93, 124, 182, 244, and 286
"This collection of data on airfoils has been made from the published reports of a number of the leading aerodynamic laboratories of this country and Europe. The information which was originally expressed according to the different customs of the several laboratories is here presented in a uniform series of charts and tables suitable for use of designing engineers and for purposes of general reference. The authority for the results here presented is given as the name of the laboratory at which the experiments were conducted, with the size of the model, wind velocity, and year of test" (p. 213).
Date:
1930~
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Characteristics of Twenty-Four Airfoils at High Speeds
"If a propeller is mounted directly on the of a modern high-speed airplane engine, the outer airfoil sections of the propeller travel at speeds approaching the speed of sound. It is possible by the use of gearing and a somewhat larger propeller to reduce the speed of the propeller sections, but only at the expense of additional weight and some frictional loss of power. This report presents the results of this work" (p. 327).
Date:
1930~
Creator:
Briggs, L. J. & Dryden, H. L.
Object Type:
Report
System:
The UNT Digital Library
Agglomeration and Leaching of Slimes and Other Finely Divided Ores
Report discussing the loads and extracting of slime and other divided ores. The report discusses experimental work done on the materials.
Date:
1930
Creator:
Sullivan, John D. & Towne, Alfred P.
Object Type:
Report
System:
The UNT Digital Library
Air forces and air-force moments at large angles of attack and how they are affected by the shape of the wing
From Summary: "The present report is, in the first place, a compilation of the test results now available from wing tests up to angles of attack 90^o. Reports are also given of tests with monoplane and auxiliary wings in the Gottingen wind tunnel for the purpose of plotting a steadily rising curve of the normal force as a foundation of the angle of attack."
Date:
July 1930
Creator:
Fuchs, Richard & Schmidt, Wilhelm
Object Type:
Report
System:
The UNT Digital Library
Aircraft Accidents: Method of Analysis
The revised report includes the chart for the analysis of aircraft accidents, combining consideration of the immediate causes, underlying causes, and results of accidents, as prepared by the special committee, with a number of the definitions clarified. A brief statement of the organization and work of the special committee and of the Committee on Aircraft Accidents; and statistical tables giving a comparison of the types of accidents and causes of accidents in the military services on the one hand and in civil aviation on the other, together with explanations of some of the important differences noted in these tables.
Date:
January 28, 1930
Creator:
Committee on Aircraft Accidents
Object Type:
Report
System:
The UNT Digital Library
Aircraft Woods: Their Properties, Selection, and Characteristics
From Summary: "This report presents, further, information on the properties of various other native species of wood compared with spruce, and discusses the characteristics of a considerable number of them from the standpoint of their possible application in aircraft manufacture to supplement the woods that are now most commonly used."
Date:
January 1, 1930
Creator:
Markwardt, L. J.
Object Type:
Report
System:
The UNT Digital Library
Airfoil Pressure Distribution Investigation in the Variable Density Wind Tunnel
Report presents the results of wind tunnel tests of pressure distribution measurements over one section each of six airfoils. Pressure distribution diagrams, as well as the integrated characteristics of the airfoils, are given for both a high and a low dynamic scale or, Reynolds number VL/V, for comparison with flight and other wind-tunnel tests, respectively. It is concluded that the scale effect is very important only at angles of attack near the burble.
Date:
January 14, 1930
Creator:
Jacobs, Eastman N.; Stack, John & Pinkerton, Robert M.
Object Type:
Report
System:
The UNT Digital Library
Alterations and Tests of The "Farnboro" Engine Indicator
"The 'Farnboro' electric indicator was tested as received from the manufacturers, and modifications made to the instrument to improve its operation. The original design of disk valve was altered so as to reduce the mass, travel, and seat area. Changes were made to the recording mechanism, which included a new method of locating the top center position on the record. The effect of friction on the motion of the pointer while taking motoring and power cards was eliminated by providing a means of putting pressure lines on the record" (p. 1).
Date:
September 1930
Creator:
Collins, John H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Analytical Determination of the Load on a Trailing Edge Flap
From Summary: "This report presents a theoretical analysis of the lift on a trailing edge flap. An analytical expression has been derived which enables the computation of the flap load coefficient. The theoretical results seem to show a fair agreement with the meager experimental results which are available."
Date:
October 1930
Creator:
Pinkerton, Robert M.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1929
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1929, activities, department reports, finance, foreign relations, organizational leadership, and other information about scouting programs.
Date:
April 8, 1930
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Annual Report of the National Advisory Committee for Aeronautics (15th). Administrative Report Including Technical Reports Nos. 309 to 336
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, bibliographies, and financial report.
Date:
1930
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Applied Potential Corrosion of Aluminum and 18-8 Stainless Steel Alloys
Introduction: In anticipation of the design of equipment for heat transfer tests, a series of short exposure corrosion tests was initiated in an effort to determine the order of magnitude of the corrosion involved. Information was required on the effect on corrosion rates of applying a potential between two concentric tubes, the annulus between them containing condensate water.
Date:
March 13, 1930
Creator:
Sanborn, Kenneth L.
Object Type:
Report
System:
The UNT Digital Library
Austin-2 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 1:48000
Date:
1930
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
The "Avro Trainer" Airplane (British): A Training Biplane
Circular presenting a description of the Avro Trainer airplane, which is primarily intended for pilots in training and is designed to be easy to use, including large, comfortable cockpits, good view, effective windshields, and wide track. Details of the design, flight characteristics, drawings, and photographs are provided.
Date:
June 1930
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Balanced and Servo Control Surfaces
"Many reports on various control systems are available, but the results cannot be generally applied since the effect of particular changes of surface-form and mounting are subject to variations depending upon airfoil section and influences of airplane layout. This report presents a simple analysis of several control systems in more general use. Elevators, ailerons, and rudders are all discussed" (p. 1).
Date:
May 1930
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A balanced diaphragm type of maximum cylinder pressure indicator
A balanced diaphragm type of maximum cylinder pressure indicator was designed to give results consistent with engine operating conditions. The apparatus consists of a pressure element, a source of controlled high pressure and a neon lamp circuit. The pressure element, which is very compact, permits location of the diaphragm within 1/8 inch of the combustion chamber walls without water cooling. The neon lamp circuit used for indicating contact between the diaphragm and support facilitates the use of the apparatus with multicylinder engines.
Date:
December 1930
Creator:
Spanogle, J. A. & Collins, John H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Barreda 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 1:24000
Date:
1930
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Bassett 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:
1930
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
The Behm Acoustic Sounder for Airplanes With Reference to Its Accuracy
Relative altimetry is of great importance for increasing the safety in aerial transportation, because it makes possible safe flying at night, by poor visibility, and when landing. Among the instruments of this type is the Behm sounder, which operates on an acoustic principle. Acoustic altimetry in general and the Behn sounder, in particular, are covered in this report.
Date:
October 1930
Creator:
Schreiber, Ernest
Object Type:
Report
System:
The UNT Digital Library
Bending Tests of Metal Monocoque Fuselage Construction
Study of the bending stress in smooth skin, aluminum alloy, true monocoque fuselage sections of varying ratio of diameter to thickness.
Date:
November 1930
Creator:
Mossman, Ralph W. & Robinson, Russell G.
Object Type:
Report
System:
The UNT Digital Library
Biennial Report of the Texas Library and Historical Commission State Library: 1928-1930
Biennial report of the Texas Library and Historical Commission for the years 1928-1930, including the budget and summaries of the library's activities.
Date:
September 1, 1930
Creator:
Texas State Library
Object Type:
Report
System:
The Portal to Texas History