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NACA Technical Memorandums
55
NACA Technical Notes
26
NACA Aircraft Circulars
9
NACA Technical Reports
7
Farmers' bulletin (United States. Department of Agriculture)
6
National Bureau of Standards Reports
4
United States Bureau of Mines Reports
4
Annual Report of the Boy Scouts of America
3
Farmers' bulletin (United States. Dept. of Agriculture)
3
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245 Matching Results
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Corrosion Embrittlement of Duralumin I: Practical Aspects of the Problem
Since aircraft design is tending toward all-metal construction, the strong heat-treatable light aluminum alloy, duralumin (a generic name for a class of heat-treatable alloys containing Cu, Mg, Mn, and Si), is finding increasing application. Doubt has been expressed concerning the reliability and permanence of these materials. Information is given on the effect of corrosion on the tensile properties of 14-gauge sheet duralumin, heat treated by quenching in hot water after being heated for 15 minutes in a fused nitrate bath at 500 to 510 C. Intercrystalline corrosion and practical aspects of intercrystalline embrittlement are discussed with respect to duralumin.
Date:
April 1928
Creator:
Rawdon, Henry S.
Object Type:
Report
System:
The UNT Digital Library
Corrosion Embrittlement of Duralumin II: Accelerated Corrosion Tests and the Behavior of High-Strength Aluminum Alloys of Different Compositions
The permanence, with respect to corrosion, of light aluminum alloy sheets of the duralumin type, that is, heat-treatable alloys containing Cu, Mg, Mn, and Si is discussed. Alloys of this type are subject to surface corrosion and corrosion of the interior by intercrystalline paths. Results are given of accelerated corrosion tests, tensile tests, the effect on corrosion of various alloying elements and heat treatments, electrical resistance measurements, and X-ray examinations.
Date:
April 1928
Creator:
Rawdon, Henry S.
Object Type:
Report
System:
The UNT Digital Library
An investigation of the characteristics of steel diaphragms for automatic fuel-injection valves
"This research on steel diaphragms was undertaken at the Langley Memorial Aeronautical Laboratory, as a part of a general investigation on fuel injection engines for aircraft. The work determined the load-deflection, load- deformation and hysteresis characteristics for single diaphragms having thicknesses from 0.00s inch to 0.012 inch, and for similar diaphragms tested in multiple having total thicknesses from 0.012 inch to 0.180 inch. The elastic limit loads and deflections, and rupture points of single diaphragms were also determined. Some work was done on diaphragms having central orifices in order to determine the effect of orifice diameter upon the load deflection characteristics" (p. 1).
Date:
April 1926
Creator:
Joachim, W. F.
Object Type:
Report
System:
The UNT Digital Library
Is There Any Available Source of Heat Energy Lighter Than Gasoline?
Note presenting an investigation to determine if lighter sources of heat energy than gasoline exist. Various explosives are considered in terms of their calorific values.
Date:
April 1923
Creator:
Meyer, P.
Object Type:
Report
System:
The UNT Digital Library
Experiments With Fabrics for Covering Airplane Wings
Note presenting a study of the strength and deformation of the fabric used to cover airplane wings, both undoped and doped. The doping of the fabric with Cellon seems to have a predominant influence on the results according to the nature and number of the coats.
Date:
April 1923
Creator:
Pröll, A.
Object Type:
Report
System:
The UNT Digital Library
Determination of the Value of Wood for Structural Purposes
Note presenting an investigation of the value of wood for structural parts subject to stress. An exploration of several different types of wood is provided, including the coefficeint of elongation in bending, tensile strength, compression strength, and energy required for fracture is provided.
Date:
April 1923
Creator:
Baumann, Richard
Object Type:
Report
System:
The UNT Digital Library
Measuring an Airplane's True Speed in Flight Testing
Note giving an overview of five distinct methods shown for timing an airplane over a given distance and measuring the wind velocity, which provides the true speed of the airplane.
Date:
April 1923
Creator:
Brown, W. G.
Object Type:
Report
System:
The UNT Digital Library
Standard containers for fruits and vegetables.
Discusses the necessity for the standardization and regulation of containers for marketing fruits and vegetables.
Date:
April 1921
Creator:
Downing, F. P. & Samson, H. W. (Harold Willis), 1888-1927
Object Type:
Book
System:
The UNT Digital Library
Rural libraries.
Describes how libraries are created in rural areas; describes the types of services offered by rural libraries.
Date:
April 1928
Creator:
Nason, W. C. (Wayne Crocker), b. 1874
Object Type:
Book
System:
The UNT Digital Library
New Application of Principle of Variable-Camber Airfoil: Lachassagne System
In studying the application of his system of varying the camber of airfoil sections, Mr. Lachassagne has just obtained a series of airfoil sections whose polar envelope presents truly remarkable aerodynamic properties.
Date:
April 1924
Creator:
Toussaint, A.
Object Type:
Report
System:
The UNT Digital Library
Law of Similitude for the Surface Resistance of Lacquered Planes Moving in a Straight Line Through Water
The proof of the validity of the Reynolds law of similitude for the surface resistance of planes has been developed with an accuracy hitherto unattained and for a large range of lengths and speeds. It has been shown that, in addition to the form resistance, the resistance of the longitudinal edges must be taken into account.
Date:
April 1925
Creator:
Gebers, Friedrich
Object Type:
Report
System:
The UNT Digital Library
Light Aeroplane Engine Development
"It has frequently been stated and written that in order to popularize light aircraft the first essential is the production of a reliable engine capable of being easily maintained and having a long life, at the same time selling at a low figure. It is desired to point out the difficulties in the way of realizing this ideal before remarking on the claims of the various types for adoption" (p. 1).
Date:
April 1925
Creator:
Fell, L. F. R.
Object Type:
Report
System:
The UNT Digital Library
The "Magnus Effect" - the Principle of the Flettner Rotor
The phenomenon of the Magnus effect consists in the fact that a revolving body moving relatively to the surrounding fluid (air) is subjected not only to drag (i.e., a force acting in a direction opposite to that of the direction of motion), but also to a lift.
Date:
April 1925
Creator:
Betz, A.
Object Type:
Report
System:
The UNT Digital Library
The Light Airplane
This report begins with a review and analysis of the work being done to develop light airplanes in the U.S. and abroad. A technical discussion of the construction and innovations in light airplanes is then presented.
Date:
April 1925
Creator:
Driggs, Ivan H.
Object Type:
Report
System:
The UNT Digital Library
Hesselman Heavy-Oil High-Compression Engine
Memorandum presenting a description of the Hesselman heavy-oil high-compression engine, which is meant to solve many of the problems associated with standard diesel engines. Specific details of the fuel pump, fuel valve, spraying, and process by which the engine functions are provided.
Date:
April 1925
Creator:
Hesselman, K. J. E.
Object Type:
Report
System:
The UNT Digital Library
The Porto Rican mole cricket.
Describes the characteristics of the mole cricket, the damage it causes, and methods of control.
Date:
April 1928
Creator:
Thomas, W. A. (William Andrew), 1883-
Object Type:
Book
System:
The UNT Digital Library
Varieties of winter wheat adapted to the eastern United States.
Describes varieties of winter wheat and where they grow in the eastern United States.
Date:
April 1921
Creator:
Leighty, C. E. (Clyde Evert), b. 1882
Object Type:
Book
System:
The UNT Digital Library
Poisoning the Cotton Boll Weevil.
A guide to selecting the most suitable method for controlling the boll weevil. Describes poisons and equipment used in boll-weevil control.
Date:
April 1929
Creator:
Coad, B. R. & Gaines, R. C. (Robert Callaway), 1898-
Object Type:
Book
System:
The UNT Digital Library
Valve-Lifter
Patent for an improved device that can be applied to a valve spring plate without losing grip.
Date:
April 8, 1920
Creator:
Chaney, Robert
Object Type:
Patent
System:
The Portal to Texas History
Process of and Apparatus for Progressive Electrostatic Separation of Comminuted Material
Patent for a new process and equipment that improves upon prior work to separate comminuted materials. This patent explores the new process which "provides means for moving the electro-static waves or charges across the line of normal movement of the material upon a support of between two opposing stationary electrodes by so directing and controlling the electric charges, that each bar electrode is charged in succession across the deck and at an angle to the movement of such deck, whereby the difficulties in separating certain classes of comminuted material with moving electrodes are overcome" (lines 32-42).
Date:
April 26, 1921
Creator:
Sutton, Henry M.; Steele, Walter L. & Steele, Edwin G.
Object Type:
Patent
System:
The Portal to Texas History
Well Bucket
Patent for Improvements in well buckets. The bucket has an inlet valve at the bottom and an air escape valve at the top that permits air to escape freely while preventing the entrance of dirt and extraneous matter to the interior of the bucket.
Date:
April 11, 1922
Creator:
Reese, Samuel L. & Reese, Samuel L.
Object Type:
Patent
System:
The Portal to Texas History
Dredge-Pump
Patent for new and useful improvements to Dredge-Pumps. The pump is used to draw up sand and gravel from the bottom of a river.
Date:
April 12, 1921
Creator:
Stenberg, Anders Gustaf
Object Type:
Patent
System:
The Portal to Texas History
Aircraft
Patent for Improvements to aircraft steering. The invention allows the pilot to adjust the center of mass.
Date:
April 5, 1921
Creator:
Johnson, Louis V.
Object Type:
Patent
System:
The Portal to Texas History
Carbon-Removing Tool
Patent for a new and improved carbon removing tool, which allows for the removal of carbon from the pistons of internal combustion engines. Includes illustrations.
Date:
April 12, 1921
Creator:
Slagle, Eugene H.
Object Type:
Patent
System:
The Portal to Texas History