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  Partner: UNT Libraries Government Documents Department
 Decade: 1920-1929
 Collection: Technical Report Archive and Image Library
The Aerodynamic Laboratory of the Belgian Service Technique de L'Aeronautique

The Aerodynamic Laboratory of the Belgian Service Technique de L'Aeronautique

Date: December 1, 1924
Creator: unknown
Description: This report provides a description of the wind tunnel housing and motors.
Contributing Partner: UNT Libraries Government Documents Department
The aerodynamic plane table

The aerodynamic plane table

Date: January 1, 1924
Creator: Zahm, A F
Description: This report gives the description and the use of a specially designed aerodynamic plane table. For the accurate and expeditious geometrical measurement of models in an aerodynamic laboratory, and for miscellaneous truing operations, there is frequent need for a specially equipped plan table. For example, one may have to measure truly to 0.001 inch the offsets of an airfoil at many parts of its surface. Or the offsets of a strut, airship hull, or other carefully formed figure may require exact calipering. Again, a complete airplane model may have to be adjusted for correct incidence at all parts of its surfaces or verified in those parts for conformance to specifications. Such work, if but occasional, may be done on a planing or milling machine; but if frequent, justifies the provision of a special table. For this reason it was found desirable in 1918 to make the table described in this report and to equip it with such gauges and measures as the work should require.
Contributing Partner: UNT Libraries Government Documents Department
The aerodynamic properties of thick aerofoils suitable for internal bracing

The aerodynamic properties of thick aerofoils suitable for internal bracing

Date: January 1, 1920
Creator: Norton, F H
Description: The object of this investigation was to determine the characteristics of various types of wings having sufficient depth to entirely inclose the wing bracing, and also to provide data for the further design of such sections. This type of wing is of interest because it eliminates the resistance of the interplane bracing, a portion of the airplane that sometimes absorbs one-quarter of the total power required to fly, and because these wings may be made to give a very high maximum lift. Results of the investigation of the following subjects are given: (1) effect of changing the upper and lower camber of thick aerofoils of uniform section; (2) effect of thickening the center and thinning the tips of a thin aerofoil; (3) effect of adding a convex lower surface to a tapered section; (4) effect of changing the mean thickness with constant center and tip sections; and (5) effect of varying the chord along the span.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic properties of thick airfoils  II

Aerodynamic properties of thick airfoils II

Date: January 1, 1923
Creator: Norton, F H
Description: This investigation is an extension of NACA report no. 75 for the purpose of studying the effect of various modifications in a given wing section, including changes in thickness, height of lower camber, taper in thickness, and taper in plan form with special reference to the development of thick, efficient airfoils. The method consisted in testing the wings in the NACA 5-foot wind tunnel at speeds up to 50 meters (164 feet) per second while they were being supported on a new type of wire balance. Some of the airfoils developed showed results of great promise. For example, one wing (no. 81) with a thickness in the center of 4.5 times that of the U. S. A. 16 showed both uniformly high efficiency and a higher maximum lift than this excellent section. These thick sections will be especially useful on airplanes with cantilever construction. (author).
Contributing Partner: UNT Libraries Government Documents Department
The aerodynamical laboratory of the Vienna Technical High School

The aerodynamical laboratory of the Vienna Technical High School

Date: February 1, 1922
Creator: Katzmayr, R
Description: We will give here only a short explanation of the operation of the plant and deal principally with the question of what it has accomplished.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamics and ballistics

Aerodynamics and ballistics

Date: July 1, 1922
Creator: Burzio, Filippo
Description: Ballistics is a science hundreds of years old and this report is an attempt to show how these older principles can be used in the newer science of aerodynamics.
Contributing Partner: UNT Libraries Government Documents Department
Aeromechanical experimentation (wind tunnel tests)

Aeromechanical experimentation (wind tunnel tests)

Date: April 1, 1929
Creator: Katzmayr, R
Description: The following report endeavors to show that aeromechanical experimentation has become an important aid to theory.
Contributing Partner: UNT Libraries Government Documents Department
Aeronautic instruction in Germany

Aeronautic instruction in Germany

Date: November 1, 1921
Creator: Bouche, Henri
Description: This report contains a list of the courses relating to aeronautics announced in Germany, both in the technical high schools and in the universities.
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
Aeronautic instruments. Section I : general classification of instruments and problems including bibliography

Aeronautic instruments. Section I : general classification of instruments and problems including bibliography

Date: January 1, 1923
Creator: Hersey, Mayo D
Description: This report is intended as a technical introduction to the series of reports on aeronautic instruments. It presents a discussion of those subjects which are common to all instruments. First, a general classification is given, embracing all types of instruments used in aeronautics. Finally, a classification is given of the various problems confronted by the instrument expert and investigator. In this way the following groups of problems are brought up for consideration: problems of mechanical design, human factor, manufacturing problems, supply and selection of instruments, problems concerning the technique of testing, problems of installation, problems concerning the use of instruments, problems of maintenance, and physical research problems. This enumeration of problems which are common to instruments in general serves to indicate the different points of view which should be kept in mind in approaching the study of any particular instrument.
Contributing Partner: UNT Libraries Government Documents Department