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Duralumin
Various properties of duralumin as used in aircraft construction are discussed, including the effects of temperature, working, tempering, and strength.
Date:
July 1920
Creator:
Unger, E. & Schmidt, E.
System:
The UNT Digital Library
Notes on the Design of Supercharged and Over-dimensioned Aircraft Engines
The author discusses the limited benefits of supercharging motors and some of the factors that make supercharging less beneficial than it initially appears.
Date:
July 1920
Creator:
Schwager, [Otto]
System:
The UNT Digital Library
Static Testing and Proposed Standard Specifications
Static tests fall into two groups, the first of which is designed to load all members of the structure approximately in accordance with the worst loads which they carry in flight, while the second is directed to the testing of specific members which are suspected of weakness and which are difficult to analyze mathematically. The nature of the loading in the second type is different for every different test, but the purpose of the first is defined clearly enough to permit the adoption of some standard set of loading specifications, at least for airplanes of normal design. Here, an attempt is made to carry through an analysis leading to such a standard, the goal being the determination of a load which will simultaneously impose on every member of the airplane structure a stress equal to the worst it will carry in flight.
Date:
July 1920
Creator:
Warner, E. P.
System:
The UNT Digital Library
Theory of Lifting Surfaces
The general basis of the theory of lifting surfaces is discussed. The problem of the flow of a fluid about a lifting surface of infinite span is examined in terms of the existence of vortexes in the current. A general theory of permanent flow is discussed. Formulas for determining the influence of aspect ratio that may be applied to all wings, whatever their plane form, are given.
Date:
July 1920
Creator:
Prandtl, L.
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
System:
The UNT Digital Library
The Caproni Seaplane
The Caproni Company recently built a seaplane of unusual design. The main supporting surfaces consisted of three triplanes in tandem, the lower wings being attached to the hull, which was described as providing accommodation for a hundred passengers. On one of the first flights, the seaplane fell into a lake, nose down, and was destroyed. The authors wish to show that this failure could have been predicted.
Date:
July 1921
Creator:
Munk, Max
System:
The UNT Digital Library
The Drawing of Experimental Curves
This report presents a discussion of how to determine the location of a line or surface from experimental data. What we desire to know practically is the number of ordinates required to obtain a certain probable precision in drawing a line or surface.
Date:
July 1921
Creator:
Norton, F. H.
System:
The UNT Digital Library
The Dynamometer Hub for the Testing Propellers and Engines During Flight
The need for a device to measure flight resistance, engine and propeller power, and efficiency during flight grew in proportion to the demand for increased flying capacity in military types of aircraft. Here, a dynamometer hub was inserted between the engine and the propeller. Taken as a whole, the tests that were conducted show that though the dynamometer is a sensitive instrument liable to numerous derangements, it is undeniably useful even in its present form, when handled with care and skill.
Date:
July 1921
Creator:
Enoch, O.
System:
The UNT Digital Library
Flexible Petrol Pipe
Report presenting an examination of flexible piping and some of the difficulties involved in creating satisfactory flexible pipe. The joint used to assist in the flexibility of the pipe is illustrated and described.
Date:
July 1921
Creator:
unknown
System:
The UNT Digital Library
The Problem of Fuel for Aviation Engines
Note presenting the physical properties which may be demanded of fuels for aviation use and the means that may be adopted by the engine manufacturers to properly meet the demands necessitated by the use of the fuel. Some of the factors that must be considered include its composition, the quantity available, the price per heat unit, and the possibility of keeping stocks in aerial ports both at home and abroad.
Date:
July 1921
Creator:
Kutzbach & James, W. S.
System:
The UNT Digital Library
Theory of the ideal windmill
Report presenting the theory of the ideal propeller, which is important for solving the problem of the action of propellers. Several different theories of propeller action are described and compared to determine which ones seem to be the most accurate.
Date:
July 1921
Creator:
Hoff, Wilhelm
System:
The UNT Digital Library
Aerial navigation by dead reckoning
Report discussing the problem to be solved, as presented to the pilot or observer of an aircraft, is as follows: The aircraft starting from A must land at B, the only data being the speed of the airplane, the altitude and the orientation D of the course. The above data would be amply sufficient, were it not for the fact that the airplane is constantly subjected to a wind of variable direction and strength.
Date:
July 1922
Creator:
Maffert, Pierre
System:
The UNT Digital Library
Aerodynamics and Ballistics
Ballistics is a science hundreds of years old and this report is an attempt to show how these older principles can be used in the newer science of aerodynamics.
Date:
July 1922
Creator:
Burzio, Filippo
System:
The UNT Digital Library
Airplane Stability Calculations and Their Verification by Flight Tests
For some time, the designers of airplanes have begun to occupy themselves with the question of longitudinal stability. In their quest to simplify calculation and data collection, the designers have attached the greatest importance to the coefficient of initial longitudinal stability. In this study a diagram was constructed from the data of the tunnel tests, which depends neither on the position of the center of gravity nor of the angle of deflection of the elevators. This diagram is constructed by means of straight lines drawn through the metacenters of the complete airplane, in a direction parallel to the tangents to the polar of the airplane relative to a system of axes fixed with reference to the airplane.
Date:
July 1922
Creator:
Rota, Augusto
System:
The UNT Digital Library
Aviation in the Belgian Congo
The establishment of air service in the Belgian Congo is detailed in this report. The airplanes, landing fields, and air routes are all discussed.
Date:
July 1922
Creator:
van Crombrugge, A.
System:
The UNT Digital Library
Beacon Lights for Air Traffic
A beacon light manufactured by the Julius Pintsch Company is described and the arrangement of these lights on a landing field is discussed.
Date:
July 1922
Creator:
unknown
System:
The UNT Digital Library
European Air Travel in 1922
This article discusses the different passenger air transport services offered in Europe. The author deals mainly with the service offered between different cities, in terms of time and cost.
Date:
July 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
The Future of the Airship
The author discusses the safety record of airships in light of the accidents with the Roma and the ZR2.
Date:
July 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
General Problem of the Airplane
A series of equations relating to airplanes are given and examples listed. Some of the equations listed include: the speed, altitude and carrying capacity of various airplanes; weight of an airplane; weight of various parts of an airplane; the polars of the wings; speeds of airplanes; radius of action.
Date:
July 1922
Creator:
Richard, Maurice & Richard, Paul
System:
The UNT Digital Library
Laying out of a practical air route
Unfortunately the problem of laying out an air route has been approached by all who give it consideration as one of the hardest tasks in the world. Whereas, as a matter of fact, a very serviceable air route can be laid out with an absolute minimum of ground work.
Date:
July 1922
Creator:
Miner, V. S. & Carroll, T.
System:
The UNT Digital Library
Maritime Aviation
This report presents some studies of maritime aviation which cover the following principal points: employment of landplanes on maritime aerial warfare; their adaption to peculiar requirements of the Navy; and the establishment of a method of aerial pursuit and bombardment, likewise adapted to military aviation over land.
Date:
July 1922
Creator:
Ravennes, Jean
System:
The UNT Digital Library
Notes on Aerodynamic Forces 2: Curvilinear Motion
"The laws of curvilinear motion are established and the transverse forces on elongated airship hulls along a curved path are investigated" (p. 1).
Date:
July 1922
Creator:
Munk, Max M.
System:
The UNT Digital Library
Notes on Aerodynamic Forces 3: The Aerodynamic Forces on Airships
"The results of the two preceding notes are applied to airships and checked with wind tunnel tests" (p. 1).
Date:
July 1922
Creator:
Munk, Max M.
System:
The UNT Digital Library
Notes on Aerodynamic Forces I: Rectilinear Motion
"The study of the motion of perfect fluids is of paramount importance for the understanding of the chief phenomena occurring in the air surrounding an aircraft, and for the numerical determination of their effects. The author recently successfully employed some simple methods for the investigation of the flow of a perfect fluid that have never been mentioned in connection with aeronautical problems. These methods appeal particularly to the engineer who is untrained in performing laborious mathematical computations, as they do away with these and allow one to obtain many interesting results by the mere application of some general and well-known principles of mechanics" (p. 1-2).
Date:
July 1922
Creator:
Munk, Max M.
System:
The UNT Digital Library