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Glues Used in Airplane Parts (open access)

Glues Used in Airplane Parts

This report was prepared for the National Advisory Committee for Aeronautics and presents the results of investigations conducted by the Forest Products Laboratory of the United States Forest Service on the manufacture, preparation, application, testing and physical properties of the different types of glues used in wood airplane parts.
Date: 1920
Creator: Allen, S. W. & Truax, T. R.
System: The UNT Digital Library
Variable Pitch Propellers (open access)

Variable Pitch Propellers

In this report are described four different types of propellers which appeared at widely separated dates, but which were exhibited together at the last Salon de l'Aeronautique. The four propellers are the Chaviere variable pitch propeller, the variable pitch propeller used on the Clement Bayard dirigible, the variable pitch propeller used on Italian dirigibles, and the Levasseur variable pitch propeller.
Date: November 1920
Creator: Bacon, D. L.
System: The UNT Digital Library
Stability of the Parachute and Helicopter (open access)

Stability of the Parachute and Helicopter

This report deals with an extension of the theory of stability in oscillation to the case of aircraft following a vertical trajectory, and particularly to the oscillations of parachutes.
Date: 1920
Creator: Bateman, H.
System: The UNT Digital Library
Progress Made in the Construction of Giant Airplanes in Germany During the War (open access)

Progress Made in the Construction of Giant Airplanes in Germany During the War

The construction of giant airplanes was begun in Germany in August, 1914. The tables annexed here show that a large number of airplanes weighing up to 15.5 tons were constructed and tested in Germany during the War, and it is certain that no other country turned out airplanes of this weight nor in such large numbers. An examination of the tables shows that by the end of the War all the manufacturers had arrived at a well-defined type, namely an airplane of about 12 tons with four engines of 260 horsepower each. The aircraft listed here are discussed with regard to useful weight and aerodynamic qualities.
Date: December 1920
Creator: Baumann, A.
System: The UNT Digital Library
Development of the Inflow Theory of the Propeller (open access)

Development of the Inflow Theory of the Propeller

Report discusses the theory of inflow of the propeller and the fact that both suctional axial velocity and suctional tangential velocity must be considered when calculating the maximum efficiency.
Date: November 1920
Creator: Betz, A.
System: The UNT Digital Library
Extinguishing and Preventing Oil and Gas Fires (open access)

Extinguishing and Preventing Oil and Gas Fires

From Introduction: " As the subject of oil and gas is necessarily broad, no attempt is made in this bulletin to treat it exhaustively; rather the bulletin aims to point out what has been done by operators in the past, and to describe various fire-prevention methods and fire-fighting apparatus which are being used or adopted by many of the larger oil companies. These methods and apparatus, it is believed, if universally employed by operators, will largely decrease the present enormous annual losses."
Date: 1920
Creator: Bowie, C. P.
System: The UNT Digital Library
Efflux of Gases Through Small Orifices (open access)

Efflux of Gases Through Small Orifices

Scientific paper issued by the Bureau of Standards over studies conducted on gas effusion rates. The methods used and the results of the studies are presented and discussed. This paper includes tables, and illustrations.
Date: January 28, 1920
Creator: Buckingham, Edgar & Edwards, Junius David
System: The UNT Digital Library
Bibliography of Petroleum and Allied Substances, 1917 (open access)

Bibliography of Petroleum and Allied Substances, 1917

From Introduction: "This bulletin is the third of the series of yearly petroleum bibliographies being published by the Bureau of Mines."
Date: 1920
Creator: Burroughs, E. H.
System: The UNT Digital Library
A Study of Airplane Ranges and Useful Loads (open access)

A Study of Airplane Ranges and Useful Loads

This report is an analysis of the maximum flight radii of typical large airplanes and a discussion of the way in which the possible length of flight is affected by the change of weight by consumption of fuel during the flight.
Date: 1920
Creator: Coffin, J. G.
System: The UNT Digital Library
Casing Troubles and Fishing Methods in Oil Wells (open access)

Casing Troubles and Fishing Methods in Oil Wells

From introduction: "The Bureau of Mines, in its researches aimed to prevent wastes and to increase efficiency in oil-well practice, has investigated the matter of casing troubles and fishing methods. The results of the investigation are set forth in this paper."
Date: 1920
Creator: Curtin, Thomas
System: The UNT Digital Library
The Problem of the Turbo-Compressor (open access)

The Problem of the Turbo-Compressor

"In terminating the study of the adaptation of the engine to the airplane, we will examine the problem of the turbo-compressor, the first realization of which dates from the war; this will form an addition to the indications already given on supercharging at various altitudes. This subject is of great importance for the application of the turbo-compressor worked by the exhaust gases. Assuming that the increase of pressure in the admission manifold is the same in both cases, the pressure in the exhaust manifold would be greater in the case in which the compressor is worked by the exhaust gas and there would result a certain reduction of engine power which we must be able to calculate" (p. 1).
Date: August 1920
Creator: Devillers, René
System: The UNT Digital Library
The altitude laboratory for the test of aircraft engines (open access)

The altitude laboratory for the test of aircraft engines

Report presents descriptions, schematics, and photographs of the altitude laboratory for the testing of aircraft engines constructed at the Bureau of Standards for the National Advisory Committee for Aeronautics.
Date: 1920%
Creator: Dickinson, H. C. & Boutell, H. G.
System: The UNT Digital Library
Synopsis of Aeronautic Radiator Investigations for Years 1917 and 1918 (open access)

Synopsis of Aeronautic Radiator Investigations for Years 1917 and 1918

Extensive series of experiments have been conducted at the Bureau of Standards to determine the properties of cooling radiator cores manufactured for airplanes and to develop improvements in design. The analysis of the problem on which this work was based, and consequently the experimental method employed, is different from that commonly used. Instead of attempting to test complete radiators, either full size or in model, uniform sections representing different types of core construction have been tested and an analysis of the results made with a view to determining independently the various factors which influence its performance. This report describes referenced method of analysis in predicting the performance of radiators designed for aeronautic use.
Date: 1920
Creator: Dickinson, H. C. & Kleinschmidt, R. V.
System: The UNT Digital Library
Comparison of hecter fuel with export aviation gasoline (open access)

Comparison of hecter fuel with export aviation gasoline

Among the fuels which will operate at compression ratios up to at least 8.0 without preignition or "pinking" is hecter fuel, whence a careful determination of its performance is of importance. For the test data presented in this report the hecter fuel used was a mixture of 30 per cent benzol and 70 per cent cyclohexane, having a low freezing point, and distilling from first drop to 90 per cent at nearly a constant temperature, about 20 degrees c. below the average distillation temperature ("mean volatility") of the x gasoline (export grade). The results of these experiments show that the power developed by hecter fuel is the same as that developed by export aviation gasoline at about 1,800 r.p.m. at all altitudes. At lower speeds differences in the power developed by the fuels become evident. Comparisons at ground level were omitted to avoid any possibility of damaging the engine by operating with open throttle on gasoline at so high a compression. The fuel consumption per unit power based on weight, not volume, averaged more than 10 per cent greater with hecter than with x gasoline. The thermal efficiency of the engine when using hecter is less than when using gasoline, …
Date: January 29, 1920
Creator: Dickinson, H. C.; Gage, V. R. & Sparrow, S. W.
System: The UNT Digital Library
Results of Tests on Radiators for Aircraft Engines (open access)

Results of Tests on Radiators for Aircraft Engines

Part 1 is to present the results of tests on 56 types of core in a form convenient for use in the study of the performance of and possible improvements in existing designs. Working rules are given by which the data contained in the report may be used, and the most obvious conclusions as to the behavior of cores are summarized. Part 2 presents the results of tests made to determine the pressure necessary to produce water flows up to 50 gallons per minute through an 8-inch square section of radiator core. These data are of special value in evaluating the hydraulic head against which the circulating pump is required to operate.
Date: 1920
Creator: Dickinson, H. C.; James, W. S. & Kleinschmidt, R. V.
System: The UNT Digital Library
Power Characteristics of Fuels for Aircraft Engines (open access)

Power Characteristics of Fuels for Aircraft Engines

Report presents the summation of results obtained in the testing of fuels of various compositions and characteristics in the altitude laboratory. The data upon which this report is based has had an important influence upon the writing of specifications for the various grades of aviation fuels.
Date: 1920
Creator: Dickinson, H. C.; James, W. S.; Roberts, E. W.; Gage, V. R. & Harper, D. R.
System: The UNT Digital Library
Self-Luminous Materials (open access)

Self-Luminous Materials

Report outlines specifications for the preparation and application of self-luminous materials to be used for the illumination of various instruments, especially those used for aeronautics.
Date: 1920
Creator: Dorsey, N. E.
System: The UNT Digital Library
Mining and Preparing Domestic Graphite for Crucible Use (open access)

Mining and Preparing Domestic Graphite for Crucible Use

From Prefactory Statement: "In this bulletin are presented the results obtained in the first two phases of the work outlined above. The bulletin is in two parts. The first part describes the methods of mining and milling used, suggests a standard method of sampling finished graphite, and describes a rapid and convenient method of analysis developed at the Pittsburgh station of the Bureau of Mines, to which has been assigned the analytical and microscopic work. The second part describes experiments on the concentration and milling of graphite, which were made at the Salt Lake City, Utah, station."
Date: 1920
Creator: Dub, George D. & Moses, Frederick G.
System: The UNT Digital Library
Experimental Research on Air Propellers, 3 (open access)

Experimental Research on Air Propellers, 3

Report presents the results of wind tunnel tests of propellers that examined the influence of the following characteristics: (1) nominal pitch ratio 1.3 combined with a certain number of the more common or standard forms and proportions; (2) driving face slightly rounded or convex; (3) change in the location of the maximum thickness ordinate of the blade section; (4) pushing forward the leading edge of the blade, thus giving a rounded convex surface on the leading side of the driving face. (5) a series of values for the constant "angle of attack" in forming propellers with radially increasing pitch. In accordance with these purposes tests were carried out on 28 propellers.
Date: 1920
Creator: Durand, W. F. & Lesley, E. P.
System: The UNT Digital Library
Testing Balloon Gas (open access)

Testing Balloon Gas

Report describes a simple, portable apparatus for testing hydrogen, with special reference to its use in balloons. "In the generation, storage, and use of hydrogen for balloon purposes it is necessary to be able to determine, first, its lifting power, and, secondly, its purity. The lifting power may be determined directly from the specific gravity. Contamination by other gases may be determined by analysis for oxygen, carbon dioxide, etc., by the usual methods of gas analysis" (p. 469).
Date: 1920
Creator: Edwards, Junius David
System: The UNT Digital Library
The Testing of Balloon Fabrics (open access)

The Testing of Balloon Fabrics

Report describes methods and materials used in waterproofing and fireproofing airplane fabrics using dopes. The determination of the probable life of a balloon fabric in service by experimental means is of great value in choosing the most suitable fabrics for a given purpose and in pointing the way to improvements in compounding and construction. The usefulness of exposure to the weather for this purpose has been amply demonstrated.
Date: 1920
Creator: Edwards, Junius David & Moore, Irwin L.
System: The UNT Digital Library
Coal-Mine Fatalities in the United States, 1919: and Coal-Mine Statistics Supplementing Those Published in Bulletin 115 (open access)

Coal-Mine Fatalities in the United States, 1919: and Coal-Mine Statistics Supplementing Those Published in Bulletin 115

Supplementary report published by the U.S. Bureau of Mines regarding fatalities in coal mines located in the United States: "In addition to giving monthly fatality tables for 1919, this report includes several tables that were published in various monthly statements since 1914, thus making available in one publication all of the data compiled since that time" (p. 9).
Date: 1920
Creator: Fay, Albert H.
System: The UNT Digital Library
A Glossary of the Mining and Mineral Industry (open access)

A Glossary of the Mining and Mineral Industry

From Introduction: "This glossary is published by the Bureau of Mines as a contribution to the mining literature in the belief that it will fill a long-felt need. It contains about 20,000 terms; these include both technical and purely local terms related to metal mining, coal mining, quarrying, petroleum, and natural gas, and metallurgical works; names of useful, important, and common minerals and rocks; and geological terms. It presents in one comprehensive volume the available standard, technical terms relating to the mining and mineral industry, as well as provincialisms that have been or are now in use in English-speaking countries."
Date: 1920
Creator: Fay, Albert H.
System: The UNT Digital Library
On the Elementary Relation Between Pitch, Slip, and Propulsive Efficiency (open access)

On the Elementary Relation Between Pitch, Slip, and Propulsive Efficiency

The author examines the current theory on the importance of reducing slip in airplane propellers. The author feels an exaggerated importance is attached to this supposition and feels that the increase in friction by an increase in propeller area or number of revolutions can't be discounted.
Date: 1920
Creator: Froude, W.
System: The UNT Digital Library