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Concrete Airship Sheds at Orly, France Part 2: Supporting Structure and Method of Moving, Mechanism for Moving the Centering, Apparatus for Handling the Materials, Remarks on Construction Details

Description: This report deals mainly with the methods of construction employed when after the plan had been approved. The foundation, side walls, doors and roof are all discussed and the economic savings resulting from this method of construction.
Date: October 1925
Creator: Freyssinet
Partner: UNT Libraries Government Documents Department
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Concrete Airship Sheds at Orly, France Part 1: General Aspect of the Problem, Basic Principles of the Final Project, Principal Structural Elements

Description: This report details the contest to design and build concrete airship hangers. The difficulty lies in the magnitude of the absolute dimensions. An airship shed must withstand two principal types of stresses: those resulting from its own weight and those due to the wind. This report discusses both problems in detail.
Date: October 1925
Creator: Freyssinet
Partner: UNT Libraries Government Documents Department
open access

Schütte-Lanz Airship Projects After the War

Description: The stressing of an airship depends on three nonuniformly distributed forces: air forces; the distribution of acceleration forces; and how the air pressure is distributed on the hull. This report examines the stresses and comes to conclusions on the size of airships.
Date: October 1925
Creator: Weiss, Georg
Partner: UNT Libraries Government Documents Department
open access

Pressure Distribution on Joukowski Wings

Description: 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.
Partner: UNT Libraries Government Documents Department
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The Flettner Rotor Ship in the Light of the Kutta-Joukowski Theory and of Experimental Results

Description: "In this paper the fundamental principles of the Flettner rotor ship (Reference I) are discussed in the light of the Kutta-Joukowski theory and available experimental information on the subject. A brief exposition of the Kutta-Joukowski theory is given and the speed of the rotor ship Buckau computed, first by using effective propulsive force obtained by the above theory, and then by direct application of wind tunnel data" (p. 1).
Date: October 1925
Creator: Rizzo, Frank
Partner: UNT Libraries Government Documents Department
open access

Radio-Frequency Resistance and Inductance of Coils Used in Broadcast Reception

Description: Technical paper issued by the Bureau of Standards over radio-frequency resistance in radio reception. As stated in the introduction, "the purpose of this paper is to present data on the radio-frequency resistance and inductance of coils within the range of frequencies used in radiotelephone broadcasting" (p. 651). This paper includes tables, and illustrations.
Date: October 22, 1925
Creator: Hund, August & De Groot, H. B.
Partner: UNT Libraries Government Documents Department
open access

Theory of Flapping Flight

Description: "Before attempting to construct a human-powered aircraft, the aviator will first try to post himself theoretically on the possible method of operating the flapping wings. This report will present a graphic and mathematical method, which renders it possible to determine the power required, so far as it can be done on the basis of the wing dimensions. We will first consider the form of the flight path through the air" (p. 1).
Date: October 1925
Creator: Lippisch, Alexander
Partner: UNT Libraries Government Documents Department
open access

[Memorandums on the Subject of Joukowski Wings]

Description: In the first article, in connection with a lecture on the hydrodynamic basis of flight and the potential flow about a Joukowski wing, the pressure distribution on several wings is computed and plotted. The diagrams of the pressure distributions are presented accompanied with a qualitative discussion of the pressure distribution. In the second article, the the cross-sectional outline (or profile) a Joukowski wing are plotted.
Date: October 1925
Creator: Blumenthal, Otto & Trefftz, E.
Partner: UNT Libraries Government Documents Department
open access

Patent of Invention--Gr 5--Cl.3--Bearing

Description: The object of this invention is a bearing: a thrust bearing. This bearing is one in which the bearing faces is a continuous annular surface and the other an annular surface divided into shoes having the form of sectors.
Date: October 28, 1925
Creator: Fulpius, Edward
Partner: UNT Libraries Government Documents Department
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