Resource Type
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Flexibility of Bearing Surfaces and Stress on Fabrics
Report presenting an investigation of the flexibility of bearing surfaces and stress on fabrics used in wings. Equations are given for calculating some of these loading factors.
Date:
June 1921
Creator:
Pröll, A.
Object Type:
Report
System:
The UNT Digital Library
Abacus for the Reduction of English Measures to the Metric System and Vice Versa
This report presents a description of an abacus with three scales: one for English measures, one for metric measures, and one with the "points of reduction", as well as construction details. There is also a detailed description on how to use the abacus.
Date:
July 1921
Creator:
Tenani, Mario
Object Type:
Report
System:
The UNT Digital Library
Pressure Distribution on Joukowski Wings
The hydrodynamics and mathematical models as applied to the potential flow about a Joukowski wing are presented.
Date:
October 1925
Creator:
Blumenthal, Otto & Trefftz, E.
Object Type:
Report
System:
The UNT Digital Library
Graphic Construction of Joukowski Wings
Memorandum presenting a description and formulas that can be used to plot the cross-sectional outline of a Joukowski wing.
Date:
1979-12?
Creator:
Trefftz, E.
Object Type:
Report
System:
The UNT Digital Library
Establishment of Aviation Schools
Report presenting a discussion of the creation of a suitable aviation school and some of the characteristics that should be considered in terms of hiring personnel, creating a curriculum, and obtaining equipment.
Date:
November 1921
Creator:
Kempe, Erich
Object Type:
Report
System:
The UNT Digital Library
Extracts From the Belgian Regulations for Government Assistance to Air Transport Companies
Report presenting information regarding the usage of commercial and passenger service air routes and the fees and penalties involved in operating an air line.
Date:
November 1921
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Aeronautic Instruction in Germany
This report contains a list of the courses relating to aeronautics announced in Germany, both in the technical high schools and in the universities.
Date:
November 1921
Creator:
Bouche, Henri
Object Type:
Report
System:
The UNT Digital Library
The danger of stalled flight and an analysis of the factors which govern it
A definition of "stalled fight" is presented as well as a detailed discussion on the how and why it occurs. Some suggestions are made to prevent its occurrence such as carrying an air speed instrument in the airplane.
Date:
November 1921
Creator:
Hopf, L.
Object Type:
Report
System:
The UNT Digital Library
Traffic Airships With Special Reference to Economy
The first part of this report details the efficiency and economy of airship travel, while the second part presents methods of economic efficiency with regards to construction, cost of upkeep and operation, and the establishment of airship lines.
Date:
November 1921
Creator:
Leyensetter, Walther
Object Type:
Report
System:
The UNT Digital Library
Dependence of Propeller Efficiency on Angle of Attack of Propeller Blade
In order to determine the maximum and the most favorable pitch for a propeller, it was found desirable to investigate the dependence of propeller efficiency on the angle of attack of the propeller blade. The results of a few experiments are given to show that propeller blades conduct themselves just like airplane wings with reference to the dependence of their efficiency on their angle of attack.
Date:
December 1921
Creator:
Borck, Hermann
Object Type:
Report
System:
The UNT Digital Library
Recent Progress in the Theory of Air Flow as Applied to Aeronautics
In summing up it may be said that the hydrodynamic theories are best confirmed by experimental results for bodies with small resistance or drag and can accordingly be used in place of experimental tests.
Date:
January 1922
Creator:
Prandtl, L.
Object Type:
Report
System:
The UNT Digital Library
Vibrations of Aviation Engines
Different causes of airplane engine vibration are given as well as devices to measure vibration.
Date:
January 1922
Creator:
Lagarde, C. Martinot
Object Type:
Report
System:
The UNT Digital Library
Aerial navigation : on the problem of guiding aircraft in a fog or by night when there is no visibility
Report discussing the use of magnetic fields and wire to navigate aircraft in conditions of poor visibility is presented. This field may be considered to be derived from a double lemniscate, considered in the particular case where the origin is a double point formed from the magnetic field of the slack wire, from the field produced by the return currents and from the field due to the currents induced in the conducting mass. These fields are dephased in two ways, one in the direction of the wire, the other in a direction perpendicular to it.
Date:
January 1922
Creator:
Loth, William
Object Type:
Report
System:
The UNT Digital Library
Pressure Measurements During Flight
The general idea was to record the air pressure on the spot, that is, without intervening tubes, by some simple automatic registering device. This was therefore made in such small dimensions that it could be inserted into the wing between the ribs and stand in direct connection with the pressure openings. The results of different experiments are presented along with the best locations for locating the instruments for recording the pressure.
Date:
November 1921
Creator:
Pröll, A.
Object Type:
Report
System:
The UNT Digital Library
The Aerodynamical Laboratory of the Vienna Technical High School
Report presenting a description of the aerodynamics laboratory of the Vienna Technical High School. The main focus of this report is detailing some of the accomplishments that the laboratory has made.
Date:
February 1922
Creator:
Katzmayr, R. & Kirste, L.
Object Type:
Report
System:
The UNT Digital Library
Marking Airdromes
Necessity of adopting for all aviation fields, civil or military, a single system of markers for giving the direction for starting and landing (with an automatic indicator of the direction of the wind) and of indicating the good part of the field.
Date:
February 1922
Creator:
James, P.
Object Type:
Report
System:
The UNT Digital Library
Deterioration of Airplane Fabrics
The observation that airplane fabrics, after long use, lose their original strength, caused the German Experimental Institute for Aviation to carry out a series of experiments on the effect of weathering on the cloth covering of airplane wings and fuselages.
Date:
February 1922
Creator:
Wendt, F.
Object Type:
Report
System:
The UNT Digital Library
Aerial Transportation
Report discussing the origin of air traffic dates from the war. The important development of aeronautic industries and the progress made in recent years, under the impelling force of circumstances, rendered it possible, after the close of hostilities, to consider the practical utilization of this new means of economic expansion.
Date:
February 1922
Creator:
Pierrot
Object Type:
Report
System:
The UNT Digital Library
The Efficiency of a Wind Tunnel
If, by some means, a steady state of motion of a perfect fluid were established in an ideal wind tunnel, there would be no losses, and the motion would persist indefinitely. In the actual tunnel, the function of the motor-fan group is overcome by the total loss of head in the tube due to friction and eddies.
Date:
February 1922
Creator:
Miller, William H.
Object Type:
Report
System:
The UNT Digital Library
High Efficiency of Seaplanes
A table is presented which includes data for calculating the index of efficiency. The author uses this data to conclude that seaplanes cannot be considered inferior to terrestrial airplanes.
Date:
August 1921
Creator:
Pegna, G.
Object Type:
Report
System:
The UNT Digital Library
Problem of Landing
The author discusses various aspects of landing aircraft such as the actual process of touchdown and the problems associated with the tail skid touching the ground before the landing gear.
Date:
August 1921
Creator:
Pistolesi, E.
Object Type:
Report
System:
The UNT Digital Library
Tests of Artificial Flight at High Altitudes
"If we wish to form an accurate idea of the extraordinary progress achieved in aeronautics, a comparison must be made of the latest altitude records and the figures regarded as highest attainable limit some ten years ago. It is desirable, for two reasons, that we should be able to define the limit of the altitudes that can be reached without artificial aid. First, to know to what extent the human body can endure the inhalation of rarified air. Second, the mental capacity of the aviator must be tested at high altitudes and the limit known below which he is able to make reliable observations without being artificially supplied with oxygen" (p. 1).
Date:
November 1920
Creator:
Gradenwitz, Arthur
Object Type:
Report
System:
The UNT Digital Library
Calculation of Wing Spars
A simplified formula for calculating wing spars is presented.
Date:
August 1921
Creator:
Ratzersdorfer, Julius
Object Type:
Report
System:
The UNT Digital Library
Calculation of Wing Spars
The author presents a comparison and combination of the numerical and geometrical determinations of the maximum M, when calculating the maximum bay moment.
Date:
August 1921
Creator:
Müller-Breslau, H.
Object Type:
Report
System:
The UNT Digital Library