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  Partner: UNT Libraries Government Documents Department
 Decade: 1920-1929
 Collection: National Advisory Committee for Aeronautics Collection
Aerodynamic properties of thick airfoils  II

Aerodynamic properties of thick airfoils II

Date: January 1, 1923
Creator: Norton, F H & Bacon, D L
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 & Kirste, L
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
Aeronautic instruments. Section II : altitude instruments

Aeronautic instruments. Section II : altitude instruments

Date: January 1, 1923
Creator: Mears, A H; Henrickson, H B & Brombacher, W G
Description: This report is Section two of a series of reports on aeronautic instruments (Technical Report nos. 125 to 132, inclusive). This section discusses briefly barometric altitude determinations, and describes in detail the principal types of altimeters and barographs used in aeronautics during the recent war. This is followed by a discussion of performance requirements for such instruments and an account of the methods of testing developed by the Bureau of Standards. The report concludes with a brief account of the results of recent investigations. For accurate measurements of altitude, reference must also be made to thermometer readings of atmospheric temperature, since the altitude is not fixed by atmospheric pressure alone. This matter is discussed in connection with barometric altitude determination.
Contributing Partner: UNT Libraries Government Documents Department
Aeronautic instruments. Section III : aircraft speed instruments

Aeronautic instruments. Section III : aircraft speed instruments

Date: January 1, 1923
Creator: Hunt, Franklin L & Stearns, H O
Description: Part 1 contains a discussion and description of the various types of air speed measuring instruments. The authors then give general specifications and performance requirements with the results of tests on air speed indicators at the Bureau of Standards. Part 2 reports methods and laboratory apparatus used at the Bureau of Standards to make static tests. Methods are also given of combining wind tunnel tests with static tests. Consideration is also given to free flight tests. Part 3 discusses the problem of finding suitable methods for the purpose of measuring the speed of aircraft relative to the ground.
Contributing Partner: UNT Libraries Government Documents Department
Aeronautic instruments. Section IV : direction instruments

Aeronautic instruments. Section IV : direction instruments

Date: January 1, 1923
Creator: Franklin, W S; Stillman, M H; Sanford, R L; Warner, John A C; Sylvander, R C & Rounds, E W
Description: Part one points out the adequacy of a consideration of the steady state gyroscopic motion as a basis for the discussion of displacements of the gyroscope mounted on an airplane, and develops a simple theory on this basis. Principal types of gyroscopic inclinometers are described and requirements stated. Part two describes a new type of stabilizing gyro mounted on top of a spindle by means of a universal joint, the spindle being kept in a vertical position by supporting it as a pendulum of which the bob is the driving motor. Methods of tests and the difficulties in designing a satisfactory and reliable compass for aircraft use in considered in part three. Part four contains a brief general treatment of the important features of construction of aircraft compasses and description of the principal types used.
Contributing Partner: UNT Libraries Government Documents Department