Collection
Texas Attorney General Opinions
1,308
Technical Report Archive and Image Library
238
National Advisory Committee for Aeronautics Collection
198
Government Documents A to Z Digitization Project
45
USDA Farmers' Bulletins
31
World War Two Collection
31
Texas State Publications
29
World War Poster Collection
26
USGS Topographic Map Collection
20
Government Documents General Collection
8
12 More
Serial/Series Title
NACA Wartime Reports
69
NACA Technical Notes
49
NACA Technical Memorandums
36
Farmers' bulletin (United States. Dept. of Agriculture)
31
NACA Advanced Restricted Reports
30
NACA Technical Reports
26
American War Posters
22
NACA Advanced Confidential Reports
21
NACA Memorandum Reports
19
NACA Special Reports
17
62 More
States
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Lift and Drag Characteristics of a Low-Drag Airfoil With Slotted Flap Submitted by Curtiss-Wright Corporation
Report presenting a wooden model equipped with a slotted flap that was tested in the two-dimensional tunnel. It represented a wing section of the Curtiss-Wright P-60A airplane and the NACA 66,2-118 section. Results regarding lift characteristics, drag coefficients, and flap deflection characteristics are provided.
Date:
December 1941
Creator:
Abbott, Ira H.
Object Type:
Report
System:
The UNT Digital Library
Pressure-Distribution Measurements of a Low-Drag Airfoil With Slotted Flap Submitted by Curtiss-Wright Corporation
"Pressure-distribution measurements were made at the request of the Materiel Division, U.S. Army Air Corps, on a 24-inch-chord wooden model equipped with a slotted flap and submitted by the Curtiss-Wright Corporation. The tests were made in the Langley two-dimensional tunnel at a Reynolds number of about 5,600,000" (p. 1).
Date:
December 1941
Creator:
Abbott, Ira H.
Object Type:
Report
System:
The UNT Digital Library
Lift and Drag Tests of Three Airfoil Models With Fowler Flaps Submitted by Consolidated Aircraft Corporation
Report presenting lift and drag tests made in the two-dimensional tunnel of three airfoil models. The models represented intermediate sections on alternative wings of the XB-32 airplane and were equipped with 0.30 Fowler flaps. Results regarding the Davis model, the C.A.C. model, and low-drag model are provided.
Date:
December 1941
Creator:
Abbott, Ira H. & Turner, Harold R., Jr.
Object Type:
Report
System:
The UNT Digital Library
Present and future problems of airplane propulsion
Some of the problems considered in this report include: thermodynamics of surface friction, application of thick wing sections, special applications of controllable propellers, and gas turbines for aircraft.
Date:
May 1941
Creator:
Ackeret, J.
Object Type:
Report
System:
The UNT Digital Library
Coal-Mine Accidents in the United States, 1938
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:
1941
Creator:
Adams, W. W.; Geyer, L. E. & Parry, M. G.
Object Type:
Report
System:
The UNT Digital Library
Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1939 (Excluding Coal Mines)
Report published by the U.S. Bureau of Mines regarding accidents at mines located in the United States for all operations except coal mines. The report includes statistics about the number and kinds of accidents as well as information about the mining operations (i.e., number of persons employed, average amount of work performed per person, etc.).
Date:
1941
Creator:
Adams, William W. & Kolhos, Mary E.
Object Type:
Report
System:
The UNT Digital Library
Metal-Mine Accidents in the United States During the Calendar Year 1938
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:
1941
Creator:
Adams, William W. & Kolhos, Mary E.
Object Type:
Report
System:
The UNT Digital Library
Quarry Accidents in the United States During the Calendar Year 1939
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:
1941
Creator:
Adams, William W. & Wrenn, Virginia E.
Object Type:
Report
System:
The UNT Digital Library
Ponds for Wildlife
"The first purpose of this bulletin is to show how farmers and ranchers may protect their ponds from sedimentation, soil erosion, and water loss through the use of vegetation suitable as food and shelter for wildlife; the second is to give some information on the management of wildlife in farm ponds. Unless otherwise stated, the information contained in this bulletin pertains to the water area, or pond proper, and the pond area, or the land immediately adjacent to the pond and ordinarily contained within a fence." -- p. ii
Date:
1941
Creator:
Allan, Philip Farley, 1909- & Davis, Cecil N.
Object Type:
Pamphlet
System:
The UNT Digital Library
The Turnip Aphid in the Southern States and Methods for Its Control
"The turnip aphid is one of the most destructive and widely distributed pests of turnip, mustard, radish, and related crops in the United States. It causes heavy losses to growers of these crops every year, especially in the Southern States. Dust mixtures containing derris, cube, or nicotine, and sprays containing derris or cube, will control the turnip aphid when applied properly. The first application of insecticides should be made when the plants are very small, and additional applications should be made at intervals of 7 to 14 days up to the time of harvest. To provide for effective application of insecticides, the seed of susceptible crops should be planted in drills, with the rows spaced uniformly apart. The following cultural practices aid in the successful production of crops exposed to turnip aphid attack: (1) A well-prepared, fertile seedbed to produce thrifty and rapidly growing plants, (2) planting the seed in drills to permit cultivation, (3) harvesting early to shorten the period of exposure to infestation, (4) destroying crop remnants to eliminate a common sources of infestation to succeeding crops, and (5) applying a nitrogenous fertilizer to stimulate plant growth." -- p. ii
Date:
1941
Creator:
Allen, Norman, 1900- & Harrison, P. K. (Perry Kips), b. 1891
Object Type:
Pamphlet
System:
The UNT Digital Library
Wind-Tunnel Investigation of Control-Surface Characteristics 3: A Small Aerodynamic Balance of Various Nose Shapes Used With a 30-Percent-Chord Flap on an NACA 0009 Airfoil
Report presenting tests in the 4- by 6-foot vertical wind tunnel of an NACA 0009 airfoil with a 30-percent-chord flap with a small amount of aerodynamic balance. In the investigation, the effect of balance nose shape and gap at the nose of the flap has been determined. The results indicate that, in general, the lift effectiveness of the flap was unaffected by the addition of a small amount of aerodynamic overhang, and the balance effectiveness of the flap was increased.
Date:
August 1941
Creator:
Ames, Milton B., Jr.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of Control-Surface Characteristics 4: A Medium Aerodynamic Balance of Various Nose Shapes Used With a 30-Percent-Chord Flap on an NACA 0009 Airfoil
Report presenting tests made in the 4- by 6-foot vertical wind tunnel of an NACA 0009 airfoil with a 30-percent-chord flap with a medium amount of aerodynamic overhanging balance. In this investigation, the effects of the shape of the flap-nose overhang and the gap at the nose of the flap have been determined. The results indicate that, generally, the lift effectiveness of the aerodynamically balanced flap was increased slightly over that of a plain flap when a blunt or medium flap nose was used on the balanced flap.
Date:
September 1941
Creator:
Ames, Milton B., Jr. & Eastman, Donald R., Jr.
Object Type:
Report
System:
The UNT Digital Library
Wind-tunnel investigation of a section of the horizontal tail surface for the Bell XP-63 airplane
Report presenting force tests conducted on a model of a section of the XP-63 horizontal tail surface in the 4- by 6-foot closed-throat vertical wing tunnel. The angle-of-attack range was from the negative to the positive stall for all flap deflections.
Date:
August 1941
Creator:
Ames, Milton B., Jr. & Hoggard, H. Page, Jr.
Object Type:
Report
System:
The UNT Digital Library
Determination of control-surface characteristics from NACA plain-flap and tab data
From Summary: "The data from previous NACA pressure-distribution investigations of plain flaps and tabs have been analyzed and are presented in this paper in a form readily applicable to the problems of control-surface design. The experimentally determined variation of aerodynamic parameters with flap chord and tab chord are given in chart form and comparisons are made with the theory. With the aid of these charts and the theoretical relationships for a thin airfoil, the aerodynamic characteristics for control surfaces of any plan form with plain flaps and tabs may be determined. A discussion of the basic equations of the thin-airfoil theory and the development of a number of additional equations that will be helpful in tail design are presented in the appendixes. The procedure for applying the data is described and a sample problem of tail design is included."
Date:
February 1941
Creator:
Ames, Milton B., Jr. & Sears, Richard I.
Object Type:
Report
System:
The UNT Digital Library
Determination of control-surface characteristics from NACA plain-flap and tab data
From Summary: "The data from previous NACA pressure-distribution investigations of plain flaps and tabs with sealed gaps have been analyzed and are presented in this paper in a form readily applicable to the problems of control-surface design. The experimentally determined variation of aerodynamic parameters with flap chord and tab chord are given in chart form and comparisons are made with the theory. With the aid of these charts and the theoretical relationships for a thin airfoil, the aerodynamic characteristics for control surfaces of any plan form with plain flaps and tabs with sealed gaps may be determined. A discussion of the basic equations of the thin-airfoil theory and the development of a number of additional equations that will be helpful in tail design are presented in the appendixes. The procedure for applying the data is described and a sample problem of horizontal tail design is included."
Date:
1941
Creator:
Ames, Milton B., Jr. & Sears, Richard I.
Object Type:
Report
System:
The UNT Digital Library
Mining Practices and Safety at the Lava Cap Gold Mining Corporation Mines, Nevada City-Grass Valley District, California
Report issued by the Bureau of Mines discussing mining safety in the Grass Valley mining district. As stated in the introduction, "the purpose of this paper is not to present an outstanding safety record but to show that gold mining can be pursued with the same degree of safety and improvement as any other industry, if and when the management recognizes that it can and must be done" (p. 1). This report includes tables, maps, illustrations, and photographs.
Date:
1941
Creator:
Ash, S. H.
Object Type:
Report
System:
The UNT Digital Library
A simplified theoretical method of determining the characteristics of a lifting rotor in forward flight
Theoretical derived expressions for the flapping, the thrust, the torque, and the profile drag-lift ratio of nonfeathering rotor with hinged, rectangular, linearly twisted blades are given as simple functions of the inflow velocity and the blade pitch. Representative values of the coefficients of each of the terms in these expressions are tabulated for a series of specified values of the tip-speed ratio. Analysis indicates that the tabulated values can be used to calculate, with reasonable accuracy, the characteristics of any rotor of conventional design.
Date:
March 17, 1941
Creator:
Bailey, F. J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Effects of Some Present-Day Airplane Design Trends on Requirements for Lateral Stability
Note presenting computations made to determine the effects of some airplane design trends on the fin area and the dihedral angle required for lateral stability. The specific factors studied were wing loading, moments of inertia in roll and yaw, wing chord, and tail length. The results of the computations are presented in the form of diagrams of variations of fin area with dihedral angle for neutral stability.
Date:
June 1941
Creator:
Bamber, Millard J.
Object Type:
Report
System:
The UNT Digital Library
Hibernation of the corn earworm in southeastern Georgia.
Discusses the results of a study of the hibernation of the corn earworm in Chatham County, Georgia from 1930 to 1933. The study was conducted in an effort to understand seasonal occurences of earworm infestation.
Date:
October 1941
Creator:
Barber, G. W. (George W.)
Object Type:
Book
System:
The UNT Digital Library
"Arise Americans" : your country and your liberty are in grave danger -- protect them now by joining the-- United States Navy or the U.S. Naval Reserve.
A sailor in a white uniform uses a wrench on a large weapon or equipment. A blue border with white stars surrounds the top and sides of the picture. The bottom half of the poster is red, with white and blue text.
Date:
June 18, 1941
Creator:
Barclay, McClelland.
Object Type:
Poster
System:
The UNT Digital Library
Fight, let's go! : join the Navy.
A sailor in a Service Dress Blue uniform carries a large white sea bag on his shoulder. He appears to be boarding a ship. Planes fly in the sky above him, some in formation. A large ship can be seen in the background.
Date:
1941
Creator:
Barclay, McClelland.
Object Type:
Poster
System:
The UNT Digital Library
Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 9. Townships 23 and 24 North Range 7 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 southwestern part of the county.
Date:
1941
Creator:
Bass, N. Wood; Dillard, W. R.; Kennedy, L. E. & Goodrich, Harold Beach
Object Type:
Report
System:
The UNT Digital Library
Keep 'em flying! : presented by the United States Army Recruiting Service.
An optical illusion. From far away, the image looks like a portrait of Uncle Sam. A close-up view reveals a grouping of images depicting the war effort, including a soldier, a sailor, a pilot, a smelter worker, a scientist, a nurse, a farmer, factories with smokestacks, a battleship, the U.S. Capitol building, and U.S. flags. In the lower left corner is the text of a poem by Jack Childs.
Date:
1941
Creator:
Beall, C. C. (Cecil Calvert), 1892-1967 & Childs, Jack
Object Type:
Poster
System:
The UNT Digital Library
Soil Survey of Cameron County, Texas
Text describes climate, agriculture, and soils of Cameron County, Texas.
Date:
1941
Creator:
Beck, M. W. (Miles Walter) & Hendrickson, B. H. (Bertram Higbie)
Object Type:
Book
System:
The Portal to Texas History