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Serial/Series Title
NACA Technical Memorandums
41
NACA Technical Notes
24
NACA Aircraft Circulars
4
NACA Technical Reports
3
National Bureau of Standards Reports
2
United States Bureau of Mines Reports
2
Farmers' bulletin (United States. Department of Agriculture)
1
Report of investigations (United States. Bureau of Mines)
1
Scientific papers (United States. National Bureau of Standards)
1
Technical paper (United States. Bureau of Mines)
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190 Matching Results
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Control of the Common Mealybug on Citrus in California.
Describes the mealybug, the damage it causes to citrus fruits in California, and methods of control.
Date:
February 1923
Creator:
Borden, Arthur Dickie, 1887-
Object Type:
Book
System:
The UNT Digital Library
Work and Expenditures of the Agricultural Experiment Stations, 1924
Volume provides a summary of the progress of each agricultural experiment station. Also includes statistics, discussions of foreign investigations, and selected studies.
Date:
February 1926
Creator:
United States. Office of Experiment Stations.
Object Type:
Book
System:
The UNT Digital Library
The production of peas for canning.
Describes the proper methods for planting, growing, and harvesting peas that will later be canned and sold.
Date:
February 1922
Creator:
Hunn, Chester J. (Chester Jermain), 1884-
Object Type:
Book
System:
The UNT Digital Library
Commercial Aviation in Germany: Past and Future
This review of commercial aviation includes postal delivery, package transport, and passenger transport. Both airplanes and airships are covered in this review.
Date:
February 1921
Creator:
Wronsky, W.
Object Type:
Report
System:
The UNT Digital Library
The Aerodynamical Laboratory of the Vienna Technical High School
Report presenting a description of the aerodynamics laboratory of the Vienna Technical High School. The main focus of this report is detailing some of the accomplishments that the laboratory has made.
Date:
February 1922
Creator:
Katzmayr, R. & Kirste, L.
Object Type:
Report
System:
The UNT Digital Library
Marking Airdromes
Necessity of adopting for all aviation fields, civil or military, a single system of markers for giving the direction for starting and landing (with an automatic indicator of the direction of the wind) and of indicating the good part of the field.
Date:
February 1922
Creator:
James, P.
Object Type:
Report
System:
The UNT Digital Library
Deterioration of Airplane Fabrics
The observation that airplane fabrics, after long use, lose their original strength, caused the German Experimental Institute for Aviation to carry out a series of experiments on the effect of weathering on the cloth covering of airplane wings and fuselages.
Date:
February 1922
Creator:
Wendt, F.
Object Type:
Report
System:
The UNT Digital Library
Aerial Transportation
Report discussing the origin of air traffic dates from the war. The important development of aeronautic industries and the progress made in recent years, under the impelling force of circumstances, rendered it possible, after the close of hostilities, to consider the practical utilization of this new means of economic expansion.
Date:
February 1922
Creator:
Pierrot
Object Type:
Report
System:
The UNT Digital Library
The Efficiency of a Wind Tunnel
If, by some means, a steady state of motion of a perfect fluid were established in an ideal wind tunnel, there would be no losses, and the motion would persist indefinitely. In the actual tunnel, the function of the motor-fan group is overcome by the total loss of head in the tube due to friction and eddies.
Date:
February 1922
Creator:
Miller, William H.
Object Type:
Report
System:
The UNT Digital Library
Loads and Calculations of Army Airplanes
By comparing airplanes of known strength that have resisted all the usual and even extreme air loads with those that under like conditions were found to be insufficiently strong, the researchers, aided by scientific investigations, developed standards which are satisfactory for the calculation of airplane structures. Given here are standards applicable to loads on wing trusses, load factors for use in stress analysis, load factors required in sand testing, loads on control surfaces, loads on wing ribs, loads on landing gear, and rigidity of materials.
Date:
February 1921
Creator:
Stelmachowski
Object Type:
Report
System:
The UNT Digital Library
The Theory of the Screw Propeller
Given here is a brief review of the fundamental principles of the propeller slip-stream theory and its further development through later researches, which demonstrate the connection between the propeller slip-stream theory and Frounde's so-called 'propeller blade theory.' The propeller slip-stream theory, especially in its improved form, now gives us the basis for determining the mutual influence of the parts of the blade, so that, in calculating the shape of the blade, we can get along with certain section characteristics, which have been determined once and for all. It is argued that new theories present the possibility of investigating the phenomena in the vicinity of the propeller, allowing us to calculate its action on the basis of fewer experimental values.
Date:
February 1922
Creator:
Betz, A.
Object Type:
Report
System:
The UNT Digital Library
Air force and three moments for F-5-L Seaplane
From Introduction: "A model of the F-5-L seaplane was made, verified, and tested at 40 miles an hour in the 8' x 8' tunnel for lift and drag, also for pitching, yawing and rolling moments. Subsequently, the yawing moment test was repeated with a modified fin. The results are reported without VL scale correction."
Date:
February 1922
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Surface area coefficients for airship envelopes
"In naval architecture, it is customary to determine the wetted surface of a ship by means of some formula which involves the principal dimensions of the design and suitable constants. These formulas of naval architecture may be extended and applied to the calculation of the surface area of airship envelopes by the use of new values of the constants determined for this purpose. Surface area coefficients were calculated from the actual dimensions, surfaces, and volumes of 52 streamline bodies, which form a series covering the entire range of shapes used in the present aeronautical practice" (p. 1).
Date:
February 1922
Creator:
Diehl, W. S.
Object Type:
Report
System:
The UNT Digital Library
Causes of cracking of ignition cable
From Summary: "The experiments described here show that the cracking at sharp bends, observed in the insulation of internal combustion engine high tension ignition wires after service, is due to a chemical attack upon the rubber by the ozone produced by the electric discharge that takes place at the surface of the cable. This cracking does not occur if the insulating material is not under tension, or if the cable is surrounded by some medium other than air. But it does occur even if the insulation is not subjected to electric stress, provided that the atmosphere near the cable contains ozone. The extent of this cracking varies greatly with the insulating material used. The cracking can be materially reduced by using braided cable and by avoiding sharp bends."
Date:
February 1921
Creator:
Dempsey, J. B. & Silsbee, F. B.
Object Type:
Report
System:
The UNT Digital Library
The Effect of the Nature of Surfaces on Resistance as Tested on Struts
The chief concern was to measure the variations of resistance brought about by the nature of the surface of the struts. The struts were spanned with aviation linen, and then covered with one coat of varnish. The top surface was not perfectly smooth after this treatment, being slightly rough owing to the threads and raised fibers of the fabric. The results of the measurements of the surfaces are shown by the dotted lines of the curves plotted in several figures.
Date:
February 1921
Creator:
Wieselsberger, G.
Object Type:
Report
System:
The UNT Digital Library
Effect of the Reversal of Air Flow Upon the Discharge Coefficient of Durley Orifices
Experiments were conducted to obtain information on the relationship between the coefficients for flow in two directions through thin plate orifices at low velocities. The results indicate that the ratio of the orifice discharge coefficient from standard orifice C(sub s)(sup 1) to the discharge coefficient from the reverse flow C(sub s) is always less than unity with increasing ratio of box area to orifice area. Even for areas as low as twenty, the ratios of the coefficients are not much less than unity. It is probable, however, that when the ratio of box area is less than twenty, the ratio of discharge coefficients would be greatly reduced. Specific results are given for the case of an apparatus for the laboratory testing of superchargers.
Date:
February 1921
Creator:
Ware, Marsden
Object Type:
Report
System:
The UNT Digital Library
Tests on an Airplane Model, AEG D I of the Allgemeine Elektricitats Gesellschft, A-G, Airplane Construction Section Conducted at the Gottingen Model Testing Laboratory for Aerodynamics
"Tests were carried out in the small wind tunnel of the Gottingen establishment on a complete model of the AEG D I airplane. The agreement between the model and the complete airplane applies particularly to the wings, which have ribs cut out of sheet metal and built up in exactly the same manner as in the actual airplane. Various series of tests were carried out with this model in which one or the other of the control surfaces were adjusted to various angles, while the others remained in their neutral positions" (p. 1).
Date:
February 1923
Creator:
Munk, Max & Molthan, Wilhelm
Object Type:
Report
System:
The UNT Digital Library
Model Supports and Their Effects on the Results of Wind Tunnel Tests
"The airflow about a model while being tested is often sufficiently affected by the model support to lead to erroneous conclusions unless appropriate corrections are used. In this paper some new material on the subject is presented, together with a review of the airfoil support corrections used in several other laboratories" (p. 1).
Date:
February 1923
Creator:
Bacon, David L.
Object Type:
Report
System:
The UNT Digital Library
Note on the Resistance of Polished Cylinders (and Cylindrical Wires) With Generatrices Perpendicular to the Airstream
Report presenting a review of currently published documents regarding the resistance of polished cylinders with generators perpendicular to the airstream. The discrepancies between these various studies are pointed out.
Date:
February 1921
Creator:
Toussaint, A.
Object Type:
Report
System:
The UNT Digital Library
Impact Tests for Woods
Although it is well known that the strength of wood depends greatly upon the time the wood is under the load, little consideration has been given to this fact in testing materials for airplanes. Here, results are given of impact tests on clear, straight grained spruce. Transverse tests were conducted for comparison. Both Izod and Charpy impact tests were conducted. Results are given primarily in tabular and graphical form.
Date:
February 1922
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Interference of Multiplane Wings Having Elliptical Lift Distribution
In calculating the self-induction of a wing surface, elliptical lift distribution is assumed, while in calculating the mutual induction or interference of two wing surfaces, a uniform distribution of the lift along the wing has hitherto been assumed. Whether the results of these calculations are substantially altered by assuming an elliptical lift distribution (which is just as probable as uniform distribution) is examined here.
Date:
February 1924
Creator:
von Sanden, H.
Object Type:
Report
System:
The UNT Digital Library
Induced Drag of Multiplanes
"The most important part of the resistance or drag of a wing system, the induced drag, can be calculated theoretically, when the distribution of lift on the individual wings is known. The calculation is based upon the assumption that the lift on the wings is distributed along the wing in proportion to the ordinates of a semi-ellipse. Formulas and numerical tables are given for calculating the drag. In this connection, the most favorable arrangements of biplanes and triplanes are discussed and the results are further elucidated by means of numerical examples" (p. 1).
Date:
February 1924
Creator:
Prandtl, L.
Object Type:
Report
System:
The UNT Digital Library
Triplane Tests
"These experiments were carried out to determine the aerodynamic characteristics of various triplanes, which differed in the relative positions of the wings and, more especially, in the stagger, and in the shape of the wing sections. The tests were restricted to such dispositions as appeared constructively adapted to the plan form considered. Four different sets of wings were used in these tests, three of which had the same cross-section but differed in aspect ratio and in area" (p. 1).
Date:
February 1924
Creator:
Wieselsberger, C.
Object Type:
Report
System:
The UNT Digital Library
Practical Method for Balancing Airplane Moments
"The present contribution is the sequel to a paper written by Messrs. R. Fuchs, L. Hopf, and H. Hamburger, and proposes to show that the methods therein contained can be practically utilized in computations. Furthermore, the calculations leading up to the diagram of moments for three airplanes, whose performance in war service gave reason for complaint, are analyzed. Finally, it is shown what conclusions can be drawn from the diagram of moments with regard to the defects in these planes and what steps may be taken to remedy them" (p. 1).
Date:
February 1924
Creator:
Hamburger, H.
Object Type:
Report
System:
The UNT Digital Library