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Revision of the American Pikas (Genus Ochotona)

Description: Discusses distribution, habitat, habits, pelage, molt, specimens, history, and nomenclature of pikas. Provides descriptions, locations, and a key for species and subspecies.
Date: August 21, 1924
Creator: Howell, Arthur H.
Item Type: Report
Partner: UNT Libraries Government Documents Department

Diaphragms for Aeronautic Instruments

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.
Date: January 1, 1924
Creator: Hersey, M D
Item Type: Report
Partner: UNT Libraries Government Documents Department

Tests on duralumin columns for aircraft construction

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.
Date: November 1, 1924
Creator: Lee, John G
Item Type: Report
Partner: UNT Libraries Government Documents Department

Magnan glider M-2

Description: The construction of the Magnan glider, M-2, is presented which is designed to fly in so-called horizontal winds.
Date: February 1924
Creator: Lesage, M Andre
Item Type: Report
Partner: UNT Libraries Government Documents Department

Motive power required to operate a wind tunnel

Description: The use of exit cones and different blade configurations to reduce the motive power required in wind tunnels is discussed in this report.
Date: September 1924
Creator: Ziembinski, S
Item Type: Report
Partner: UNT Libraries Government Documents Department

Wind tunnel tests of correction formula for wings of large span

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.
Date: May 1924
Creator: Wieselsberger, C
Item Type: Report
Partner: UNT Libraries Government Documents Department

Experiments on the resistance of airplane wheels and radiators

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.
Date: July 1924
Item Type: Report
Partner: UNT Libraries Government Documents Department

Voyage of the "Dixmude" over northern Africa

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

Combustion of liquid fuels in diesel engine

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.
Date: October 1, 1924
Creator: Alt, Otto
Item Type: Report
Partner: UNT Libraries Government Documents Department

The vector ruling protractor

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.
Date: March 1, 1924
Creator: Zahm, A F
Item Type: Report
Partner: UNT Libraries Government Documents Department

Device for measuring sound in airplane engines

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.
Date: June 1, 1924
Creator: Robrovsky, T
Item Type: Report
Partner: UNT Libraries Government Documents Department

Ultra-light alloys and their utilization on aircraft

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.
Date: May 1, 1924
Creator: Defleury, R & Portevin, A M
Item Type: Report
Partner: UNT Libraries Government Documents Department

Air transport

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.
Date: January 1, 1924
Creator: Page, F Handley
Item Type: Report
Partner: UNT Libraries Government Documents Department

Aeronautic instruments

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.
Date: February 1924
Creator: Koppe, H & Everling, E
Item Type: Report
Partner: UNT Libraries Government Documents Department

Effect of altitude on power of aviation engines

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.
Date: November 1924
Creator: Raffaelli, Italo
Item Type: Report
Partner: UNT Libraries Government Documents Department

Historical notes on aerodynamic research

Description: It is obviously interesting to know the names of those who were the first contributors to aeronautical science. Therefore, without claiming to give a complete history, I present in this article a summary list of names in chronological order relating to the history of experiments on the resistance of the air and its application to aeronautics.
Date: August 1924
Creator: Dollfus, Charles
Item Type: Report
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

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.
Date: December 1924
Item Type: Report
Partner: UNT Libraries Government Documents Department

Velocity and pressure distribution behind bodies in an air current

Description: The following experiments on the air flow behind bodies were made for the purpose of assisting in the explanation of the phenomena connected with air resistance. The first two series of experiments dealt with the phenomena behind a cylinder. The third series of experiments was carried out behind a streamlined strut.
Date: July 1924
Creator: Betz, A
Item Type: Report
Partner: UNT Libraries Government Documents Department

Aviation engines in the endurance contest

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.
Date: December 1924
Creator: Lehr, G
Item Type: Report
Partner: UNT Libraries Government Documents Department

Remarks on building of low-powered airplanes

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.
Date: January 1, 1924
Creator: Langsdorff, Werner V
Item Type: Report
Partner: UNT Libraries Government Documents Department

Methods of experimentation with models and utilization of results

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.
Date: February 1, 1924
Creator: Robert,
Item Type: Report
Partner: UNT Libraries Government Documents Department

Fatigue of internal combustion engines

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.
Date: April 1, 1924
Creator: Dumanois, P
Item Type: Report
Partner: UNT Libraries Government Documents Department