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Principle of the Boerner Airship

Description: "The Boerner airship is built on entirely different principles from ordinary airships, of which the Zeppelin is the best known type. Mr. Boerner has abandoned the rigid body of the Zeppelin and has adopted a body with a double keel forming a rigid platform for attaching the gas ballonets, which must support the whole in the air" (p. 1).
Date: November 1922
Creator: Kapteyn, A.
Partner: UNT Libraries Government Documents Department

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

Large German airship stations

Description: "It is profitable to examine the organization and equipment of the German airship stations. The stations best adapted for serving as the basis of this study were chiefly constructed by the German Navy, during the war, for exclusively military purposes and do not therefore entirely satisfy the conditions of exploitation required for a civilian air service. The requisite modifications for satisfying the latter conditions may nevertheless be readily determined according to circumstances" (p. 1).
Date: August 1921
Creator: Sabatier, J.
Partner: UNT Libraries Government Documents Department

Mooring Airships

Description: The purpose of this paper is to summarize the present status of the problem of mooring airships. Mooring with one, two and even three cables are all discussed.
Date: October 1924
Creator: Crocco, G. A.
Partner: UNT Libraries Government Documents Department

Comparison of Nonrigid and Semirigid Airships

Description: "One of the main subjects of airship science consists in establishing cooperation between two vertical forces, the buoyancy of the air and the attraction of gravity. The mechanism for establishing this cooperation must have the minimum weight and offer the minimum head resistance. Starting with this principle, let us consider what improvements can be made in the present type of non-rigid airships" (p. 1).
Date: November 1922
Creator: Stapfer
Partner: UNT Libraries Government Documents Department

Airship Model Tests in the Variable Density Wind Tunnel

Description: This report presents the results of wind tunnel tests conducted to determine the aerodynamic characteristics of airship models. Eight Goodyear-Zeppelin airship models were tested in the original closed-throat tunnel. After the tunnel was rebuilt with an open throat a new model was tested, and one of the Goodyear-Zeppelin models was retested. The results indicate that much may be done to determine the drag of airships from evaluations of the pressure and skin-frictional drags on models tested at large Reynolds number.
Date: January 27, 1931
Creator: Abbott, Ira H.
Partner: UNT Libraries Government Documents Department

Application of Practical Hydrodynamics to Airship Design

Description: The purpose of the first two parts of this report is to present in concise format all the formulas required for computation of the hydrodynamic forces, so that they can be easily computed for either straight or curvilinear flight. Improved approximations are also introduced having a high degree of accuracy throughout the entire range of practical proportions. The remaining two parts of the report are devoted respectively to stability and skin friction, as functions of the same hydrodynamic forces.
Date: 1933
Creator: Upson, Ralph H. & Klikoff, W. A.
Partner: UNT Libraries Government Documents Department

Water Model Tests for Semirigid Airships

Description: The design of complicated structures often presents problems of extreme difficulty which are frequently insoluble. In many cases, however, the solution can be obtained by tests on suitable models. These model tests are becoming so important a part of the design of new engineering structures that their theory has become a necessary part of an engineer's knowledge. For balloons and airships water models are used. These are models about 1/30 the size of the airship hung upside down and filled with water under pressure.
Date: 1926
Creator: Tuckerman, L. B.
Partner: UNT Libraries Government Documents Department

Loss of the Dixmude

Description: The causes of the destruction of the Dixmude are discussed and some conclusions are drawn. The author believes a gasoline fire instead of a lightning strike was probably responsible, but the public believes otherwise.
Date: April 1924
Creator: Eckener, Hugo
Partner: UNT Libraries Government Documents Department

Method of Curved Models and Its Application to the Study of Curvilinear Flight of Airships: Part 1

Description: In the first part of this paper we shall present the theoretical side of the problem of constructing curved model forms and the method of testing the model. In the second part we shall present a detailed account of the first experiments according to the given method, carried out with a curved model of the nonrigid airship V-2, and a comparison of the experimental results with some data of full-scale tests made with this airship in 1933.
Date: June 1937
Creator: Gourjienko, G. A.
Partner: UNT Libraries Government Documents Department

Note on the Pressure Distribution Over the Hull of Elongated Airships With Circular Cross Section

Description: "This note, prepared for the National Advisory Committee for Aeronautics, contains the demonstration that the pressure around the circular cross section of an elongated airship, plotted against the diameter of symmetry, can be expected to be represented by a straight line" (p. 1).
Date: May 1924
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department

The Present Status of Airship Construction, Especially of Airship-Framing Construction

Description: "This work proposes to sketch, in broad outline, the status of airship construction in the various countries, at a time when commerce over great distances might be finally opened up to the airship through the performances of the "Graf Zeppelin." After a short historical review, a survey of the most important rigid and semirigid airships built since 1925, their differences and special problems, is made. In more detailed treatment, the framing construction of the more recent rigid airships and some especially interesting structural questions are investigated" (p. 1).
Date: July 1938
Creator: Ebner, Hans
Partner: UNT Libraries Government Documents Department

Replacing the Weight of Materials Consumed on Airships

Description: Two methods to replace the weight of gas lost on long airship flights are discussed: condensing the water of combustion and thermic sustentation. In the present article we will discuss the first method, leaving the second to be examined in a subsequent article.
Date: June 1923
Creator: Crocco, G. A.
Partner: UNT Libraries Government Documents Department

The Drag of Airships

Description: Report presenting an examination of the drag of airships in order to design more functional aircraft and to obtain information for future research.
Date: September 1926
Creator: Havill, Clinton H.
Partner: UNT Libraries Government Documents Department

The Drag of Zeppelin Airships

Description: This report is a discussion of the results of tests with Zeppelin airships, in which the propellers were stopped as quickly as possible while the airship was in full flight. In this paper the author refers to the theory involved in these tests and calls attention to one scientifically interesting fact which can be derived from the tests and which has not yet been noted. The most important question concerning the tests is: does the negative acceleration of an airship with stopped propellers supply proper data for determining the drag of the airship when in uniform flight?
Date: 1923
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department

Calculation of Potential Flow Past Airship Bodies in Yaw

Description: An outline of Von Karman's method of computing the potential flow of airships in yaw by means of partially constant dipolar superposition on the axis of the body is followed by several considerations for beginning and end of the superposition. Then this method is improved by postulating a continuous, in part linearly variable dipolar superposition on the axis. The second main part of the report brings the calculation of the potential flow by means of sources and sinks, arranged on the surface of the airship body.
Date: July 1932
Creator: Lotz, I.
Partner: UNT Libraries Government Documents Department

A Study of Static Stability of Airships

Description: The first section deals with the theoretical side of statical stability of airships in general. The second section deals with preliminary tests of the model and experiments for the determination of effects due to change of tail area, aspect ratio, tail form, and tail thickness.
Date: September 1924
Creator: Rizzo, Frank
Partner: UNT Libraries Government Documents Department