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Structural Methods Employed by the Schutte-Lanz Airship Company
"This article is based on the experience of the Schute-Lanz Airship Company in light construction. The object is to stimulate the employment of these methods in other fields of industry" (p. 1).
Date:
May 1925
Creator:
Gentzcke
System:
The UNT Digital Library
Experimental Investigation of the Physical Properties of Medium and Heavy Oils, Their Vaporization and Use in Explosion Engines Part 1
While little has been accomplished in obtaining an abundant supply of light oils from coal and heavy oils, progress has been made on engine design to make use of the heavier oils. Progress has been made in two different directions which are outlined in this paper: the group of engines with medium and high-pressure carburetion in the cylinder; and the group of engines with low-pressure carburetion of the heavy oils before reaching the cylinder.
Date:
May 1926
Creator:
Heinlein, Fritz
System:
The UNT Digital Library
Experimental Investigation of the Physical Properties of Medium and Heavy Oils, Their Vaporization and Use in Explosion Engines Part 2
This report is an evaluation of the experiments on the use of heavy oils in explosion engines. A method for determining the heat of vaporization of these heavy oils is presented.
Date:
May 1926
Creator:
Heinlein, Fritz
System:
The UNT Digital Library
Kinetographic Flow Pictures
A method is presented for photographing the flow of fluids with a kinetograph.
Date:
May 1926
Creator:
Prandtl, L. & Tietjens, O.
System:
The UNT Digital Library
Metal Airplane Construction
It has long been thought that metal construction of airplanes would involve an increase in weight as compared with wood construction. Recent experience has shown that such is not the case. This report describes the materials used, treatment of, and characteristics of metal airplane construction.
Date:
May 1926
Creator:
unknown
System:
The UNT Digital Library
Air Cooling: An Experimental Method of Evaluating the Cooling Effect of Air Streams on Air-Cooled Cylinders
In this report is described an experimental method which the writer has evolved for dealing with air-cooled engines, and some of the data obtained by its means. Methods of temperature measurement and cooling are provided.
Date:
May 1927
Creator:
Alcock, J. F.
System:
The UNT Digital Library
Determining the Velocity Distribution in the Boundary Layer of an Airfoil Fitted With a Rotary Cylinder
In the closer investigation of the results obtained from a wing model with a rotary cylinder mounted in its leading edge (NACA TM's 307 and 354), the velocity distribution in the vicinity of the surface of the model was determined by a hot-wire anemometer. The results confirmed the belief that the rotary cylinder had considerable effect on the air flow, but demonstrated the fact that the direct influence of the cylinder is confined to a very thin layer in immediate proximity to the surface.
Date:
May 1927
Creator:
Van der Hegge Zijnen, B. G.
System:
The UNT Digital Library
High-Speed Oil Engines for Vehicles Part 3
Ignition-chamber engines and their fuel injection systems are investigated. Specific details are provided for fuel-injection nozzles and fuel pumps are provided.
Date:
May 1927
Creator:
Hausfelder, Ludwig
System:
The UNT Digital Library
Multiplicity of Solutions in Aerodynamics
"One of the most striking phenomena which accompany the flow of fluids such as air and water about bodies, is that of changes in character. This phenomena is still very little understood. We will first discuss the nature of these changes and then show that pure theory leads to a multiplicity of characters of flow, among which we will endeavor to indicate those bearing some analogy to experimental results" (p. 1).
Date:
May 1927
Creator:
Dupont, M.
System:
The UNT Digital Library
Comments on Crankless Engine Types
This report describes the leading crankless engine types, which have appeared in recent years. These types include: the Mitchell crankless motor car engine and the German Michel engine.
Date:
May 1928
Creator:
unknown
System:
The UNT Digital Library
Discussion of problems relating to the safety of aviation. Part 1
The object of the present treatise is to examine the present status of aerial safety and to review the efforts of various commissions to promote safety.
Date:
May 1928
Creator:
Sabatier, J.
System:
The UNT Digital Library
Discussion of problems relating to the safety of aviation. Part 2
This report focuses on structural strength and engine design in building and designing safer aircraft.
Date:
May 1928
Creator:
Sabatier, J.
System:
The UNT Digital Library
Prospective Development of Giant Airplanes
This report presents a survey of the latest German giant airplane projects. A description of the physical form of the airplanes, their performance, and some possible applications are provided.
Date:
May 1928
Creator:
Von Römer, B.
System:
The UNT Digital Library
Wheel Brakes and Their Application to Aircraft
"The advantages to be gained from braking have not been ignored, and in the search for a suitable method many schemes have been suggested and tried. Some of the methods discussed in this paper include: 1) increasing the height of the landing gear; 2) air brakes of various forms; 3) sprags on tail skid and axle; and 4) wheel brakes. This report focuses on the design of wheel brakes and wheel brake controls" (p. 1).
Date:
May 1928
Creator:
Dowty, G. H.
System:
The UNT Digital Library
Contribution to the Technique of Landing Large Airships: Part 1
Many treatises in regard to construction of airship sheds are lacking in data on air currents, for which reason this phase of the problem will be here thoroughly discussed in connection with the accompanying photographs of currents.
Date:
May 1929
Creator:
Krell, O.
System:
The UNT Digital Library
Contribution to the Technique of Landing Large Airships: Part 2
Memorandum presenting a description of the development of the mooring mast and how it contributes to the technique of landing large airships. Some of its fundamental requirements and how it can factor into safe landings are provided.
Date:
May 1929
Creator:
Krell, O.
System:
The UNT Digital Library
Materials and Methods of Construction in Light Structures
Different methods of constructing light airplanes are presented with a view toward increasing production and efficiency.
Date:
May 1929
Creator:
Rohrbach, Adolf
System:
The UNT Digital Library
On the Strength of Box Type Fuselages
The present investigation relates to a box-type fuselage with sides consisting of thin smooth sheet metal, stiffened by longitudinal members riveted to the flanged channel-section bulkheads or transverse frames and to the semicircular corrugated corner stiffenings. The results obtained in this particular case can be applied to a great number of similar structures.
Date:
May 1929
Creator:
Mathar, J.
System:
The UNT Digital Library
Technical report of the 1928 Rhon soaring-flight contest
Report presenting some information on the gliders that participated in the 1928 Rhön soaring flight contest. Almost all of the gliders represented an improvement over gliders used in the previous years. A great increase in the skill of the glider pilots is also noted.
Date:
May 1929
Creator:
Lippisch, A.
System:
The UNT Digital Library
Balanced and Servo Control Surfaces
"Many reports on various control systems are available, but the results cannot be generally applied since the effect of particular changes of surface-form and mounting are subject to variations depending upon airfoil section and influences of airplane layout. This report presents a simple analysis of several control systems in more general use. Elevators, ailerons, and rudders are all discussed" (p. 1).
Date:
May 1930
Creator:
unknown
System:
The UNT Digital Library
Development of the Junkers-Diesel Aircraft Engine
The working process of the Junkers engine has resulted from a series of attempts to attain high performance and to control the necessarily rapid and complete combustion at extremely high speeds. The two main problems of Diesel engines in aircraft are addressed; namely, incomplete combustion and the greater weight of Diesel engine parts compared to gasoline engines.
Date:
May 1930
Creator:
Gasterstädt
System:
The UNT Digital Library
Experimental Research on the Friction of Pivots
In horology the friction between solids is of the greatest importance; one limited, however, to the application of the laws of Coulomb which, do not at all correspond with reality. This report presents a review of the subject and some general conclusions. The choice of lubricant is discussed as well as the pressure between frictional surfaces. The gears in a watch are used extensively as examples.
Date:
May 1930
Creator:
Jaquerod, A.; Defossez, L. & Mügeli, H
System:
The UNT Digital Library
The Magnus Effect in Theory and in Reality
A discussion of the Flettner rotor is presented from a nautical and economic viewpoint, and although it was a failure, the experimental and theoretical inventions cannot be disregarded. The following critical and experimental investigation will show the relations and applicability of the theories and practical applications. The Magnus effect is described in detail and a discussion and critical review of the Magnus effect is included.
Date:
May 1930
Creator:
Ahlborn, F.
System:
The UNT Digital Library
Recent Tests of Tailless Airplanes
This report details the advantages and construction of tailless airplanes. Both a glider and a powered model were built and the specifications of both airplanes are listed.
Date:
May 1930
Creator:
Lippisch, Alexander
System:
The UNT Digital Library