Resource Type
Collection
Technical Report Archive and Image Library
172
National Advisory Committee for Aeronautics Collection
146
Government Documents A to Z Digitization Project
36
USDA Farmers' Bulletins
30
Texas State Publications
10
USGS Topographic Map Collection
7
Texas Soil Surveys
4
Environmental Policy Collection
2
Federal Communications Reports
2
Government Documents General Collection
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NACA Technical Notes
50
NACA Technical Memorandums
40
NACA Technical Reports
40
Farmers' bulletin (United States. Dept. of Agriculture)
27
Leaflet (United States. Department of Agriculture)
17
United States Bureau of Mines Reports
14
NACA Special Reports
12
United States Geological Survey Reports
5
U.S. Geological Survey bulletin
4
Farmers' bulletin (United States. Department of Agriculture)
3
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249 Matching Results
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Tests in the variable-density wind tunnel of the NACA 23012 airfoil with plain and split flaps
From Summary: "Section characteristics for use in wing design are presented for the NACA 23012 airfoil with plain and split flaps of 20 percent wing chord at a value of the effective Reynolds number of about 8,000,000. The flap deflections covered a range from 60 degrees upward to 75 degrees downward for the plain flap and from neutral to 90 degrees downward for the split flap. The split flap was aerodynamically superior to the plain flap in producing high maximum lift coefficients and in having lower profile-drag coefficients at high lift coefficients."
Date:
January 21, 1938
Creator:
Abbott, Ira H. & Greenberg, Harry
Object Type:
Report
System:
The UNT Digital Library
Flow observations with tufts and lampblack of the stalling of four typical airfoil sections in the NACA variable-density tunnel
From Summary: "A preliminary investigation of the stalling processes of four typical airfoil sections was made over the critical range of the Reynolds Number. Motion pictures were taken of the movements of small silk tufts on the airfoil surface as the angle of attack increased through a range of angles including the stall. The boundary-layer flow also at certain angles of attack was indicated by the patterns formed by a suspension of lampblack in oil brushed onto the airfoil surface. These observations were analyzed together with corresponding force-test measurements to derive a picture of the stalling processes of airfoils."
Date:
October 1938
Creator:
Abbott, Ira H. & Sherman, Albert
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1935
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:
1938
Creator:
Adams, W. W. & Kolhos, M. E.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Accidents in the United States, 1935
Report compiled by the U.S. Bureau of Mines including statistics on fatal and non-fatal accidents 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:
1938
Creator:
Adams, W. W.; Geyer, L. E. & Parry, M. G.
Object Type:
Report
System:
The UNT Digital Library
Quarry Accidents in the United States During the Calendar Year 1936
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:
1938
Creator:
Adams, William W. & Wrenn, Virginia E.
Object Type:
Report
System:
The UNT Digital Library
The Pack Method for Compressive Tests of Thin Specimens of Materials Used in Thin-Wall Structures
"The strength of modern lightweight thin-wall structures is generally limited by the strength of the compression members. An adequate design of these members requires a knowledge of the compressive stress-strain graph of the thin-wall material. The "pack" method was developed at the National Bureau of Standards with the support of the National Advisory Committee for Aeronautics to make possible a determination of compressive stress-strain graphs for such material" (p. 133).
Date:
August 23, 1938
Creator:
Aitchison, C. S. & Tuckerman, L. B.
Object Type:
Report
System:
The UNT Digital Library
Calculation of the chordwise load distribution over airfoil sections with plain, split, or serially hinged trailing-edge flaps
From Summary: "A method is presented for the rapid calculation of the incremental chordwise normal-force distribution over an airfoil section due to the deflection of a plain flap or tab, a split flap, or a serially hinged flap. This report is intended as a supplement to NACA Report no. 631, wherein a method is presented for the calculation of the chordwise normal-force distribution over an airfoil without a flap or, as it may be considered, an airfoil with flap (or flaps) neutral. The method enables the determination of the form and magnitude of the incremental normal-force distribution to be made for an airfoil-flap combination for which the section characteristics have been determined. A method is included for the calculation of the flap normal-force and hinge-moment coefficients without necessitating a determination of the normal-force distribution."
Date:
1938
Creator:
Allen, H. Julian
Object Type:
Report
System:
The UNT Digital Library
Tank tests of a model of one hull of the Savoia S-55-X flying boat - N.A.C.A. Model 46
A model of one of the twin hulls of the Italian Savoia S-55-X flying boat (N.A.C.A. Model 46) was tested in the N.A.C.A. tank according to the general method. The data obtained from these tests cover a broad range of speeds, loads, and trims and are given in nondimensional form to facilitate their use in applying this form of hull to any other flying boat or comparing it's performance with the performance of any other hulls. The results show that the resistance characteristics at best trim of this model are excellent throughout the speed range. In order to compare the performance of the S-55-X hull with that of the 35, a pointed-step hull developed at the N.A.C.A. tank, the data are used in the computations of take-off example of a twin-hull, 23,500-pound flying boat. The calculations show that the S-55-X hull has better take-off performance.
Date:
February 1938
Creator:
Allison, John M.
Object Type:
Report
System:
The UNT Digital Library
Tank Tests of Model 36 Flying Boat Hull
"N.A.C.A. Model 36, a hull form with parallel middle body for half the length of the forebody and designed particularly for use with stub wings, was tested according to the general fixed-trim method over the range of practical loads, trims, and speeds. It was also tested free to trim with the center of gravity at two different positions. The results are given in the form of nondimensional coefficients. The resistance at the hump was exceptionally low but, at high planing speeds, afterbody interference made the performance only mediocre" (p. 1).
Date:
March 1938
Creator:
Allison, John M.
Object Type:
Report
System:
The UNT Digital Library
Carpet Beetles.
Describes the common types of carpet beetles, their life cycles, and methods of control.
Date:
March 28, 1938
Creator:
Back, E. A. (Ernest Adna), 1886-
Object Type:
Book
System:
The UNT Digital Library
House Ants.
Describes different types of house ants and methods of control.
Date:
April 1938
Creator:
Back, E. A. (Ernest Adna), 1886-
Object Type:
Book
System:
The UNT Digital Library
A study of the torque equilibrium of an autogiro rotor
From Summary: "Two improvements have been made in the method developed in NACA Reports nos. 487 and 591 for the estimation of the inflow velocity required to overcome a given decelerating torque in an autogiro rotor. At low tip-speed ratios, where the assumptions necessary for the analytical integrations of the earlier papers are valid, the expressions therein derived are greatly simplified by combining and eliminating terms with a view of minimizing the numerical computations required. At high tip-speed ratios, by means of charts based on graphical integrations, errors inherent in the assumptions associated with the analytical method are largely eliminated."
Date:
January 10, 1938
Creator:
Bailey, F. J., Jr.
Object Type:
Report
System:
The UNT Digital Library
America will be as strong as her women.
Charcoal sketch of a woman holding up a young girl.
Date:
1938
Creator:
Baldridge, Cyrus Leroy, 1889-1977.
Object Type:
Poster
System:
The UNT Digital Library
Spinning characteristics of wings 5: N.A.C.A. 0009, 23018, and 6718 monoplane wings
Three rectangular monoplane wings having rounded tips were tested on the N.A.C.A. spinning balance in the 5-foot vertical wind tunnel. The airfoil sections used were the N.A.C.A. 0009, 23018, and 6718. The aerodynamic characteristics of the models and a prediction of the angles of sideslip for steady spins are given. There is included an estimate of the yawing moment that must be furnished by parts of the airplane to balance the inertia couples and wing yawing moments for spinning equilibrium. The predicted angles of sideslip and yawing moments required for spinning equilibrium for a Clark Y wing with the same form are included for comparison.
Date:
January 1938
Creator:
Bamber, M. J. & House, R. O.
Object Type:
Report
System:
The UNT Digital Library
Hays County, Texas: Records of wells and springs, drillers' logs, water analyses and map showing location of wells
Data complied regarding wells and other water resources, including water quality analysis, measurements, and other relevant information.
Date:
November 15, 1938
Creator:
Barnes, B. A.
Object Type:
Report
System:
The Portal to Texas History
Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 1. Townships 22 and 23 North Ranges 10 and 11 East
This report is part of a series describing the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found in parts of Osage County, Oklahoma. This part discusses the geology and resources in the southeastern part of the county.
Date:
1938
Creator:
Bass, N. Wood; Kennedy, L. E.; Dillard, W. R.; Leatherock, Otto & Hengst, J. H.
Object Type:
Report
System:
The UNT Digital Library
The production of cucumbers in greenhouses.
Lists the best ways to grow cucumbers in a greenhouse environment, and discusses insect and disease enemies of the cucumber.
Date:
September 1938
Creator:
Beattie, James H. (James Herbert), b. 1882
Object Type:
Book
System:
The UNT Digital Library
Cauliflower and Heading Broccoli Production.
A guide to growing cauliflower and heading broccoli on the farm.
Date:
April 1938
Creator:
Beattie, James H. (James Herbert), b. 1882 & Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
Production of Garlic.
Discusses garlic as a crop in terms of its different varieties, the steps for preparing land, cultivating, harvesting, cleaning, and shipping garlic for the market.
Date:
July 1938
Creator:
Beattie, James H. (James Herbert), b. 1882 & Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
Production of Parsnips.
A guide to growing, harvesting, and storing parsnips.
Date:
February 1938
Creator:
Beattie, James H. (James Herbert), b. 1882 & Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
Production of Radishes.
Describes the varieties of radishes and the best practices for growing and marketing them.
Date:
March 1938
Creator:
Beattie, James H. (James Herbert), b. 1882 & Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
Production of Spinach.
Describes characteristics and varieties of spinach, and provides farmers with recommendations for soils, fertilizers, cultivating, and harvesting it.
Date:
April 1938
Creator:
Beattie, James H. (James Herbert), b. 1882 & Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library
The City Home Garden
Revised edition. "Fresh vegetables for an average family may be grown upon a large back yard or city lot.... Thousands of acres of idle land that may be used for gardens are still available within the boundaries of our large cities. Some of the problems that confront the city gardener are more difficult than those connected with the farm garden, and it is the object of this bulletin to discuss these problems from a practical standpoint." -- p. 2. Soil preparation, tools, seeding, watering, diseases and pests, and space issues are all discussed and brief descriptions of several vegetables are given.
Date:
1938
Creator:
Beattie, W. R. (William Renwick), b. 1870
Object Type:
Pamphlet
System:
The UNT Digital Library
Production of Salsify or Vegetable-Oyster.
Introduces salsify and its varieties, and discusses ways to cultivate, store, cook, and sell it.
Date:
February 1938
Creator:
Beattie, W. R. (William Renwick), b. 1870
Object Type:
Book
System:
The UNT Digital Library