Resource Type
Collection
Technical Report Archive and Image Library
163
National Advisory Committee for Aeronautics Collection
124
USGS Topographic Map Collection
42
USDA Farmers' Bulletins
18
Government Documents A to Z Digitization Project
16
Texas Soil Surveys
9
Texas State Publications
5
Texas Senate Journals
4
Texas House of Representatives Journals
3
United States Experiment Station Record
2
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NACA Technical Memorandums
52
United States Bureau of Mines Reports
31
NACA Technical Notes
29
7.5 Minute Series (Topographic)
24
NACA Technical Reports
23
NACA Aircraft Circulars
19
Farmers' bulletin (United States. Dept. of Agriculture)
17
30 Minute Series
12
41st Legislature of Texas
7
Leaflet (United States. Department of Agriculture)
7
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255 Matching Results
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Effect of variation of chord and span of ailerons on rolling and yawing moments at several angles of pitch
This report presents the results of an extension to higher angles of attack of the investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wings. The measurements were made at various angles of pitch but at zero angle of roll and yaw, the wing chord being set at an angle of +4 degrees to the fuselage axis. In the case of the Clark Y airfoil the measurements have been extended to a pitch angle of 40 degrees, using ailerons of span equal to 67 per cent of the wing semispan and chord equal to 20 and 30 per cent of the wing chord. The work was conducted on wing models of 60-inch span and 10-inch chord.
Date:
October 7, 1929
Creator:
Heald, R. H.; Strother, D. H. & Monish, B. H.
Object Type:
Report
System:
The UNT Digital Library
Analysis of flight and wind-tunnel tests on Udet airplanes with reference to spinning characteristics
This report presents an analysis of results of wind-tunnel tests conducted at the D.V.L. Values were determined for the effectiveness of all the controls at various angles of attack. The autorotation was studied by subjecting the rotating model to an air blast.
Date:
March 1929
Creator:
Herrmann, H.
Object Type:
Report
System:
The UNT Digital Library
Viscosity of diesel engine fuel oil under pressure
In the development of Diesel engine fuel injection systems it is necessary to have an approximate knowledge of the absolute viscosity of the fuel oil under high hydrostatic pressures. This report presents the results of experimental tests conducted by Mr. Jackson Newton Shore, utilizing the A.S.M.E. high pressure equipment.
Date:
September 1929
Creator:
Hersey, Mayo D.
Object Type:
Report
System:
The UNT Digital Library
Oxides in Pig Iron: Their Origin and Action in the Steel-Making Process
From Introduction: "In summarizing the evidence in the literature it is apparent that there is general agreement among furnace men on the existence of so-called "bad-iron." It is also evident that the existence of dissolved or occluded gases is not an explanation. The presence of suspended oxides has been proved, and at least one plausible explanation for their formation has been given."
Date:
1929
Creator:
Herty, C. H., Jr. & Gaines, J. M., Jr.
Object Type:
Report
System:
The UNT Digital Library
The effect of a flap and ailerons on the N.A.C.A. M-6 airfoil section
"This report contains the results obtained at the Langley Memorial Aeronautical Laboratory on an N. A. C. A. M-6 airfoil, fitted with a flap and ailerons, and tested in the variable density wind tunnel at a density of 20 atmospheres. Airfoil characteristics are given for the model up to 48 degree angle of attack with the flap set at various angles, and also with the ailerons set at similar angles. The approximate lift distribution and the center of pressure variation along the span are determined with the model at 18 degree angle of attack and with the ailerons displaced at 20 degrees" (p. 1).
Date:
1929
Creator:
Higgins, George J. & Jacobs, Eastman N.
Object Type:
Report
System:
The UNT Digital Library
Welding Rustproof Steels
The following experimental results will perhaps increase the knowledge of the process of welding rustproof steels. The experiments were made with two chrome-steel sheets and with two chrome-steel-nickel sheets having the composition shown in Table I.
Date:
September 1929
Creator:
Hoffmann, W.
Object Type:
Report
System:
The UNT Digital Library
Petroleum Refinery Statistics: 1927
Report issued by the Bureau of Mines over statistical records kept on petroleum refineries during 1927. Statistical information on different forms of petroleum is discussed. This report includes tables.
Date:
1929
Creator:
Hopkins, G. R.
Object Type:
Report
System:
The UNT Digital Library
Survey of Gravities of Domestic Crudes
Report on the comparative gravities of oil extracted from different regions of the United States.
Date:
April 1929
Creator:
Hopkins, G. R. & Coons, A. B.
Object Type:
Report
System:
The UNT Digital Library
Revision of the American Chipmunks: (Genera Tamias and Eutamias)
Brief summary of the geographic distribution, life history, and subgenera of genera Tamias and Eutamias.
Date:
November 1929
Creator:
Howell, Arthur H.
Object Type:
Report
System:
The UNT Digital Library
List of State Registered Plant Breeders and State Certified Seed Growers
This report explains the requirements of registered plant breeder licensed to produce registered and certified cotton seed.
Date:
September 1929
Creator:
Humbery, E. P.; Del Curto, J. M. & Farris, W. D.
Object Type:
Book
System:
The Portal to Texas History
The operation and care of the combined harvester-thresher.
Describes the benefits of the combined harvester-thresher, proper methods for its use, and its maintenance.
Date:
October 1929
Creator:
Hurst, W. M. (Wilbur Magruder), 1898-
Object Type:
Book
System:
The UNT Digital Library
Information Obtained From Airplane Flight Tests in the Year 1927-1928
The information obtained from flight tests in 1927-1928 covers chiefly the effect of the structural features of an airplane on its stability, controllability, maneuverability and spinning characteristics.
Date:
October 1929
Creator:
Hübner, W.
Object Type:
Report
System:
The UNT Digital Library
Permissible Storage - Battery Locomotives and Power Trucks
From Introduction: "The purpose of this paper is therefore to give essential data in regard to the construction of approved storage-battery locomotives and power trucks."
Date:
1929
Creator:
Ilsley, L. C.; Gleim, E. J. & Brunot, H. B.
Object Type:
Report
System:
The UNT Digital Library
Hog Lice and Hog Mange: Methods of Control and Eradication.
Revised edition. Report discussing lice and mange, two external parasites which commonly affect hogs. Infected hogs may experience irritation, arrested growth, lack of vitality, and have an increased risk of death. Both diseases are discussed in details along with potential remedies. Treatments include hand applications, spraying, hog oilers, medicated hog wallows, and dipping.
Date:
1929
Creator:
Imes, Marion
Object Type:
Pamphlet
System:
The UNT Digital Library
The Drag and Interference of a Nacelle in the Presence of a Wing
A wing interference investigation was conducted to determine why the N.A.C.A. cowling did not yield the expected increase in speed when adapted to the outboard nacelles of trimotored airplanes. The results indicate that the drag and interference of the engine nacelle with the cowling, when combined with a thick wing, can be reduced from its value as originally applied by changing its position and fairing it into the wing.
Date:
October 1929
Creator:
Jacobs, Eastman N.
Object Type:
Report
System:
The UNT Digital Library
Pressure Distribution on a Slotted R.A.F. 31 Airfoil in the Variable Density Wind Tunnel
Measurements were made in the variable density wind tunnel to determine the pressure distribution over one section of a R.A.F. 31 airfoil with a leading edge slot fully open. To provide data for the study of scale effect on this type of airfoil, the tests were conducted with air densities of approximately one and twenty atmospheres.
Date:
June 1929
Creator:
Jacobs, Eastman N.
Object Type:
Report
System:
The UNT Digital Library
Sphere Drag Tests in the Variable Density Wind Tunnel
The air forces on a twenty-centimeter sphere were measured after it had been rebuilt as an open throat type. The results from tests made at widely different densities and airspeeds and also on a smaller sphere are given. The conclusions are that approximately the same drag coefficient is obtained at a given value of the Reynolds number irrespective of what combination of the variables is used to obtain that value and that the turbulence of the air stream at the test section, as measured by the critical Reynolds number of a sphere, is less for the new tunnel than for the old one.
Date:
August 1929
Creator:
Jacobs, Eastman N.
Object Type:
Report
System:
The UNT Digital Library
Large-scale aerodynamic characteristics of airfoils as tested in the variable density wind tunnel
From Summary: "In order to give the large-scale characteristics of a variety of airfoils in a form which will be of maximum value, both for airplane design and for the study of airfoil characteristics, a collection has been made of the results of airfoil tests made at full-scale values of the Reynolds number in the variable density wind tunnel of the National Advisory Committee for Aeronautics. They have been corrected for tunnel wall interference and are presented not only in the conventional form but also in a form which facilitates the comparison of airfoils and from which corrections may be easily made to any aspect ratio. An example showing the method of correcting the results to a desired aspect ratio has been given for the convenience of designers. In addition, the data have been analyzed with a view to finding the variation of the aerodynamic characteristics of airfoils with their thickness and camber."
Date:
October 21, 1929
Creator:
Jacobs, Eastman N. & Anderson, Raymond F.
Object Type:
Report
System:
The UNT Digital Library
Aeromechanical Experimentation (Wind Tunnel Tests)
The following report endeavors to show that aeromechanical experimentation has become an important aid to theory. Experiments can be tried with separate parts of airplanes or with models of whole airplanes, with propellers, and with anything else that comes into contact with moving air.
Date:
April 1929
Creator:
Katzmayr, R.
Object Type:
Report
System:
The UNT Digital Library
Travel of the Center of Pressure of Airfoils Transversely to the Air Stream
The experiments here described were performed for the purpose of obtaining the essential facts concerning the distribution of the air force along the span. We did not follow, however, the time-consuming method of point-to-point measurements of the pressure distribution on the wing surfaces, but determined directly the moment of mean force about an axis passing through the middle of the span parallel to the direction of flight.
Date:
September 1929
Creator:
Katzmayr, Richard
Object Type:
Report
System:
The UNT Digital Library
Wings With Nozzle-Shaped Slots
Even before the publication of the results of the Gottingen experiments on the removal of the boundary layer by suction, experiments with nozzle-slotted wings were begun. A report of those experiments will be given here. Taken collectively, the experiments show that, as regards increasing the lift values, the effect of the air flowing from the nozzle-shaped slots is similar to the effect produced in the case of ordinary slotted wings. The high lift values are attained, however, at the smaller angles of attack employed in ordinary flight.
Date:
July 1929
Creator:
Katzmayr, Richard
Object Type:
Report
System:
The UNT Digital Library
Tuberculosis in Live Stock: Detection, Control, and Eradication.
Revised edition. Report discussing the incidence of tuberculosis in cattle and efforts necessary to detect, control, and eradicate it. Includes discussion of causes, symptoms, diagnostic methods, the tuberculin test, and best methods for eradication and prevention.
Date:
1929
Creator:
Kiernan, John Andrew, 1873-1927 & Wight, Alexander E.
Object Type:
Pamphlet
System:
The UNT Digital Library
Wind Tunnel Tests on a Model of a Monoplane Wing with Floating Ailerons
This report describes preliminary wind tunnel tests on a model of a monoplane wing equipped with wing tip floating ailerons. Lift and drag, as well as rolling and yawing moments, were measured.
Date:
September 1929
Creator:
Knight, Montgomery & Bamber, Millard J.
Object Type:
Report
System:
The UNT Digital Library
Wind Tunnel Tests on Airfoil Boundary Control Using a Backward Opening Slot (1929)
"This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil equipped with a backward opening slot. Various slot locations, widths of opening, and pressures, were used. The tests were conducted in the Five-Foot Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory" (p. 1).
Date:
October 1929
Creator:
Knight, Montgomery & Bamber, Millard J.
Object Type:
Report
System:
The UNT Digital Library