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  Partner: UNT Libraries Government Documents Department
 Decade: 1920-1929
 Year: 1924
 Collection: National Advisory Committee for Aeronautics Collection
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
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
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
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
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
Experiments on the resistance of airplane wheels and radiators

Experiments on the resistance of airplane wheels and radiators

Date: July 1, 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
Aeronautic instruments

Aeronautic instruments

Date: February 1, 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
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
Nomenclature for Aeronautics

Nomenclature for Aeronautics

Date: January 1, 1924
Creator: unknown
Description: This nomenclature for aeronautics was prepared by a special conference on aeronautical nomenclature by the Executive Committee of the National Advisory Committee for Aeronautics at a meeting held August 11, 1933. This publication supersedes all previous publications of the committee on this subject. The purpose of the committee in the preparation and publication of this report is to secure uniformity in the official documents of the government and, as far as possible, in technical and other commercial publications.
Contributing Partner: UNT Libraries Government Documents Department
Analysis of W. F. Durand's and E. P. Lesley's propeller tests

Analysis of W. F. Durand's and E. P. Lesley's propeller tests

Date: January 1, 1924
Creator: Munk, Max M
Description: This report is a critical study of the results of propeller model tests with the view of obtaining a clear insight into the mechanism of the propeller action and of examining the soundness of the physical explanation generally given. The nominal slip-stream velocity is plotted against the propeller tip velocity, both measured by the velocity of flight as a unit. Within the range corresponding to conditions of flight, the curve thus obtained is a straight line. Its inclination depends chiefly on the effective blade width, its position on the effective pitch. These two quantities can therefore be determined from the result of each propeller test. Both can easily be estimated therefrom for new propellers of similar type. Thus, a simple method for the computation of propellers suggests itself.
Contributing Partner: UNT Libraries Government Documents Department
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