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 Decade: 1920-1929
 Year: 1924
 Collection: Technical Report Archive and Image Library
Large Mollier Chart (Foot-Pound-Fahrenheit Units): Properties of Ammonia

Large Mollier Chart (Foot-Pound-Fahrenheit Units): Properties of Ammonia

Date: 1924
Creator: United States. Bureau of Standards.
Description: Large mollier chart showing the properties of ammonia.
Contributing Partner: UNT Libraries Government Documents Department
Revision of the American Pikas (Genus Ochotona)

Revision of the American Pikas (Genus Ochotona)

Date: August 21, 1924
Creator: Howell, Arthur H.
Description: Discusses distribution, habitat, habits, pelage, molt, specimens, history, and nomenclature of pikas. Provides descriptions, locations, and a key for species and subspecies.
Contributing Partner: UNT Libraries Government Documents Department
Permissible Explosives, Mining Equipment, and Apparatus Approved Prior to January 1, 1924

Permissible Explosives, Mining Equipment, and Apparatus Approved Prior to January 1, 1924

Date: 1924
Creator: Crawshaw, John Edward, 1880-; Ilsley, L. C., 1880-; Parker, Dorsey J. & Fieldner, Arno Carl, 1881-1966
Description: Report documenting mining explosives, equipment, and breathing apparatuses approved by the United States Bureau of Mines prior to January 1, 1924.
Contributing Partner: UNT Libraries Government Documents Department
Diaphragms for Aeronautic Instruments

Diaphragms for Aeronautic Instruments

Date: January 1, 1924
Creator: Hersey, M D
Description: This investigation was carried out at the request of the National Advisory Committee for Aeronautics and comprises an outline of historical developments and theoretical principles, together with a discussion of expedients for making the most effective use of existing diaphragms actuated by the hydrostatic pressure form an essential element of a great variety instruments for aeronautic and other technical purposes. The various physical data needed as a foundation for rational methods of diaphragm design have not, however, been available hitherto except in the most fragmentary form.
Contributing Partner: UNT Libraries Government Documents Department
The vector ruling protractor

The vector ruling protractor

Date: March 1, 1924
Creator: Zahm, A F
Description: The theory, structure and working of a vector slide rule is presented in this report. This instrument is used for determining a vector in magnitude and position when given its components and its moment about a point in their plane.
Contributing Partner: UNT Libraries Government Documents Department
Ultra-light alloys and their utilization on aircraft

Ultra-light alloys and their utilization on aircraft

Date: May 1, 1924
Creator: Defleury, R & Portevin, A M
Description: We will arbitrarily call alloys having a specific gravity of less than 2 "ultra-light", in order to distinguish them from "light" alloys with a specific gravity of 2 to 3. Thus far it has been possible to make ultra-light alloys only by employing a large proportion of magnesium.
Contributing Partner: UNT Libraries Government Documents Department
Device for measuring sound in airplane engines

Device for measuring sound in airplane engines

Date: June 1, 1924
Creator: Robrovsky, T
Description: I will here call attention to a device, constructed according to the system of Gati with which it is possible to measure the sound of an engine and test the effect of a silencer.
Contributing Partner: UNT Libraries Government Documents Department
Fatigue of internal combustion engines

Fatigue of internal combustion engines

Date: April 1, 1924
Creator: Dumanois, P
Description: The above conditions enable the employment of a criterion of general fatigue which simultaneously takes account of both mechanical and thermal conditions, for the sake of comparing any projected engine with engines of the same type already in use.
Contributing Partner: UNT Libraries Government Documents Department
Measuring vibration and torque with the oscillograph

Measuring vibration and torque with the oscillograph

Date: December 1, 1924
Creator: Elsasser, R
Description: The recent development of technical science demands maximum reliability of functioning, together with maximum utilization of construction materials. For this purpose we must know what stresses are produced during functioning. One cause of great stresses are mechanical vibrations and this report describes a method of using an oscilloscope to measure the stresses of rapidly changing phenomena.
Contributing Partner: UNT Libraries Government Documents Department
Motion of spheres in still fluids

Motion of spheres in still fluids

Date: April 1, 1924
Creator: Hirsch, P
Description: The behavior of a liquid or gaseous medium, in which a solid body can move freely under the action of a force of constant magnitude and direction, is yet little known.
Contributing Partner: UNT Libraries Government Documents Department
Tests on duralumin columns for aircraft construction

Tests on duralumin columns for aircraft construction

Date: November 1, 1924
Creator: Lee, John G
Description: The following paper is based on the results of tests, upon duralumin columns, contained in two theses presented to the Department of Civil and Sanitary Engineering of the Massachusetts Institute of Technology.
Contributing Partner: UNT Libraries Government Documents Department
Remarks on building of low-powered airplanes

Remarks on building of low-powered airplanes

Date: January 1, 1924
Creator: Langsdorff, Werner V
Description: If the low-powered airplane is to be used advantageously by private individuals, the most important consideration is a smaller fuel consumption and, hence, a lower engine power. From experiments with gliders, it appears entirely possible, by utilizing ascending winds (on the weather side of mountains and those generated by the heat of the sun) and by employing engine flight intermittently, as required to fly long distances over land.
Contributing Partner: UNT Libraries Government Documents Department
The practical difficulties of commercial flying

The practical difficulties of commercial flying

Date: March 1, 1924
Creator: Courtney, F T
Description: This paper relates some of the problems commercial aircraft companies have in attracting larger numbers of paying customers. The author discusses some remedies such as changing the public perception of flying as dangerous.
Contributing Partner: UNT Libraries Government Documents Department
Methods of experimentation with models and utilization of results

Methods of experimentation with models and utilization of results

Date: February 1, 1924
Creator: Robert,
Description: The present report treats the subject of testing small models in a wind tunnel and of the methods employed for rendering the results constant, accurate and comparable with one another. Detailed experimental results are given.
Contributing Partner: UNT Libraries Government Documents Department
Air transport

Air transport

Date: January 1, 1924
Creator: Page, F Handley
Description: I purpose (sic) in this paper to deal with the development in air transport which has taken place since civil aviation between England and the Continent first started at the end of August 1919. A great deal of attention has been paid in the press to air services of the future, to the detriment of the consideration of results obtained up to the present.
Contributing Partner: UNT Libraries Government Documents Department
Combustion of liquid fuels in diesel engine

Combustion of liquid fuels in diesel engine

Date: October 1, 1924
Creator: Alt, Otto
Description: Hitherto, definite specifications have always been made for fuel oils and they have been classified as more or less good or non-utilizable. The present aim, however, is to build Diesel engines capable of using even the poorest liquid fuels and especially the waste products of the oil industry, without special chemical or physical preparation.
Contributing Partner: UNT Libraries Government Documents Department
Aviation engines in the endurance contest

Aviation engines in the endurance contest

Date: December 1924
Creator: Lehr, G
Description: The contest for engines of great endurance had entries of 13 types by the following firms: Breguet, Farman, Fiat, Hispano-Suiza, Lorraine-Dietrich, Panhard-Levassor, Peugeot, Renault, and Salmson.
Contributing Partner: UNT Libraries Government Documents Department
Aeronautic instruments

Aeronautic instruments

Date: February 1924
Creator: Koppe, H & Everling, E
Description: The development of aeronautic instruments. Vibrations, rapid changes of the conditions of flight and of atmospheric conditions, influence of the air stream all call for particular design and construction of the individual instruments. This is shown by certain examples of individual instruments and of various classes of instruments for measuring pressure, change of altitude, temperature, velocity, inclination and turning or combinations of these.
Contributing Partner: UNT Libraries Government Documents Department
Nomogram for correcting drag and angle of attack of an airfoil model in an air stream of finite diameter

Nomogram for correcting drag and angle of attack of an airfoil model in an air stream of finite diameter

Date: December 1924
Creator: unknown
Description: In experimenting with airfoil models in a wind tunnel, the magnitude of the forces acting on the model is affected by the fact that the air stream in which the model is suspended, has a restricted cross-section. In order to utilize the results for an airplane in an unlimited quantity of air, a correction must be made. The magnitude of this correction was determined by Prandtl by the application of his wing theory.
Contributing Partner: UNT Libraries Government Documents Department
Effect of altitude on power of aviation engines

Effect of altitude on power of aviation engines

Date: November 1924
Creator: Raffaelli, Italo
Description: These notes are intended to furnish practical and general data on the effect of altitude on engine power. The effective horsepower of an engine is a function of the mean pressure of the fluid acting on the pistons, of the R.P.M. of the engine and of the mechanical efficiency.
Contributing Partner: UNT Libraries Government Documents Department
Motive power required to operate a wind tunnel

Motive power required to operate a wind tunnel

Date: September 1924
Creator: Ziembinski, S
Description: The use of exit cones and different blade configurations to reduce the motive power required in wind tunnels is discussed in this report.
Contributing Partner: UNT Libraries Government Documents Department
Wind tunnel tests of correction formula for wings of large span

Wind tunnel tests of correction formula for wings of large span

Date: May 1924
Creator: Wieselsberger, C
Description: The theory (wing experiments in an artificial air stream are subject to error, due to the fact that the wing is not situated in an unlimited body of air) by means of which the given drag correction was obtained, was based on various assumptions (e.g., elliptical distribution of lift) which do not always hold true. For this reason it was desirable to test the equation for the additional drag in regard to its reliability and range of application.
Contributing Partner: UNT Libraries Government Documents Department
Experiments on the resistance of airplane wheels and radiators

Experiments on the resistance of airplane wheels and radiators

Date: July 1924
Creator: unknown
Description: Experiments were made on the resistance of four airplane wheels of different sizes and coverings and two Lamblin radiators. The results show the important influence of the wheel coverings. The closing of a shutter, which was fitted to one of the radiators, considerably lessened the resistance.
Contributing Partner: UNT Libraries Government Documents Department
Voyage of the "Dixmude" over northern Africa

Voyage of the "Dixmude" over northern Africa

Date: March 1924
Creator: Lemaire,
Description: This article presents the difficulties and triumphs of the airship Dixmude in its long distance flight over North Africa.
Contributing Partner: UNT Libraries Government Documents Department
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