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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
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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
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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
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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
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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
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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… more
Date: 1926
Creator: Tuckerman, L. B.
Partner: UNT Libraries Government Documents Department

[Blimp in the Sky]

Description: Photograph of the underside of a blimp flying in the sky. The corner of a building can be seen in the bottom left corner of the photograph. The word "tires" can be seen on the blimp.
Date: 193X
Creator: Williams, Byrd M. (Byrd Moore), III
Partner: UNT Libraries Special Collections
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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 forc… more
Date: 1933
Creator: Upson, Ralph H. & Klikoff, W. A.
Partner: UNT Libraries Government Documents Department
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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… more
Date: January 27, 1931
Creator: Abbott, Ira H.
Partner: UNT Libraries Government Documents Department
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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
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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
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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
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The Effect of Bow Stiffeners in Nonrigid Airships

Description: "It is now well known that all nonrigid airships constructed at the present time have bow stiffeners consisting of battens curved to the form of the envelope and designed to hold the nose of the ship in its true form despite the very large pressure which exists at the extreme forward point. The effect of the stiffeners is to reduce considerably the apparent pressure which has to be maintained inside the envelope in order to prevent the nose from caving in" (p. 1).
Date: August 1923
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department
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Traffic Airships With Special Reference to Economy

Description: 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
Partner: UNT Libraries Government Documents Department
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Hydrostatic Test of an Airship Model

Description: An airship model made by the Goodyear Rubber Company was filled with water and suspended from a beam. The deformations of the envelope were studied under the following conditions: 1) both ballonets empty; 2) forward ballonets filled with air; 3) rear ballonets filled with air; and 4) both ballonets filled with air. Photographs were taken to record the deflections under each of these conditions, and a study was made to determine the minimum head of water necessary to maintain the longitudinal ax… more
Date: March 1922
Partner: UNT Libraries Government Documents Department
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The Choice of the Speed of an Airship

Description: The favorable speed of an airship is chiefly determined by the condition of the consumption of the least amount of fuel per unit of traveled distance, although other conditions come into play. The resulting rules depend on the character of the wind and on the variability of the efficiency of the engine propeller units. This investigation resulted in the following rules. 1) Always keep the absolute course and steer at such an angle with reference to it as to neutralize the side wind. 2) In a str… more
Date: March 1922
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department
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The Dead Weight of the Airship and the Number of Passengers That Can Be Carried

Description: In order to determine an approximate formula giving the weight of a dead load as a function of the volume (V) of the envelope and of the maximum velocity (v), we will take the relative weight of the various parts of the airship (P(sub v), M, V, A, T(sup 34)), adopting a mean value of the coefficients determined. This formula may be adopted both for semi-rigid airships with suspended nacelle and non-rigid envelope, with or without internal suspensions. It may also be adapted to airships with rig… more
Date: January 1922
Creator: Crocco
Partner: UNT Libraries Government Documents Department
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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
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A method of determining the dimensions and horsepower of an airship for any given performance

Description: A simple and easily applied method of calculating the dimensions and horsepower necessary for an airship to have any given performance is described and illustrated by examples. The method includes means for estimating the changes in performance or in size when modifications or new features are introduced into a design, involving increase or saving in weights, or changes in resistance or propulsive efficiency.
Date: May 1924
Creator: Burgess, C. P.
Partner: UNT Libraries Government Documents Department
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