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Selling Air Transport
The marketing and advertising of air transport is discussed in this article.
Date:
November 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Type of Engine to Employ
The engine of a commercial airplane must, above all, be sure and durable. It seems therefore, that we must use engines with vertical cylinders or in the V form with quite a small angle.
Date:
November 1922
Creator:
Hamel, M.
System:
The UNT Digital Library
The "Universal" Adjustable and Reversible Propeller Built by Paragon Engineers, Inc., Baltimore, MD
"A device which does for the aircraft what change speed gears do for the automobile is the invention of Spencer Heath. It comprises a system of special blades and a mechanism for varying the pitch of the blades from zero to 360 degrees, while in flight or otherwise. By adjusting the pitch, either before starting or while the engine is running, to a less than normal angle, the engine is allowed to pick up speed and deliver its maximum power which is necessary in taking-off with a heavier load than the same airplane could otherwise normally carry" (p. 1).
Date:
November 1922
Creator:
Bacon, David L.
System:
The UNT Digital Library
The Usefulness of Stunting
Stunting is an important part of the training of a military pilot, and the knowledge gained in passing through the "acrobatic course" is put to constant use in service, especially with fighting aircraft.
Date:
November 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Air Resistance Measurements on Actual Airplane Parts
"For the calculation of the parasite resistance of an airplane, a knowledge of the resistance of the individual structural and accessory parts is necessary. The most reliable basis for this is given by tests with actual airplane parts at airspeeds which occur in practice. The data given here relate to the landing gear of a Siemanms-Schuckert DI airplane; the landing gear of a 'Luftfahrzeug-Gesellschaft' airplane (type Roland Dlla); landing gear of a 'Flugzeugbau Friedrichshafen' G airplane; a machine gun, and the exhaust manifold of a 269 HP engine" (p. 1).
Date:
November 1923
Creator:
Weiselsberger, C.
System:
The UNT Digital Library
Determination of Climbing Ability
"The vertical distribution of the pressure, temperature, and density of the atmosphere varies from day to day. Thus, rates of climb on different days cannot be compared directly, but must be corrected with reference to a standard rate of diminution of air density with increasing altitude. The following problem, therefore, has to be solved" (p. 1).
Date:
November 1923
Creator:
Blasius, H.
System:
The UNT Digital Library
Monoplanes or Biplanes?
This article presents a discussion of the relative merits between monoplanes and biplanes. A comparison of the aerodynamic qualities and advantages of both types are provided.
Date:
November 1923
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Note on a New and Simple Method of Dead Reckoning in Aerial Navigation
Memorandum presenting a method of calculating the dead reckoning in aerial navigation.
Date:
November 1923
Creator:
Constantin, Louis
System:
The UNT Digital Library
Possibility of Profitable Air Traffic Between Lisbon and Rio De Janeiro
Different aspects of an airship line between Lisbon and Rio de Janeiro are presented. Some of the factors discussed are: the number of passengers, fuel consumption, design, itinerary, airports, flight times, and income.
Date:
November 1923
Creator:
Sherz, Walter
System:
The UNT Digital Library
Rigid Airships
Memorandum presenting the history and development of airships. Tables containing information and statistics regarding some of the current airships are provided.
Date:
November 1923
Creator:
Stahl, Friedrich
System:
The UNT Digital Library
Rules and Regulations for Endurance Contest of Aviation Engines: Under the Auspices of the Aero Club of France
Memorandum presenting the rules and regulations of the Endurance Contest of Aviation Engines, which was put on by the Aero Club of France. A description of the rules regarding the aircraft in competition, the characteristics of the tests that were conducted, and information regarding classification of the aircraft is provided.
Date:
November 1923
Creator:
unknown
System:
The UNT Digital Library
Static Soaring Flight Over Flat Sea Coasts
Static soaring flight has hitherto been accomplished by means of two sources of energy: ascending air currents in the vicinity of obstacles and those produced by unequal heating. The latter has not yet been practically tested in soaring flight.
Date:
November 1923
Creator:
Georgii, W.
System:
The UNT Digital Library
Tests on Riveted Joints in Sheet Duralumin
In making tension tests, the slippage of the joints was noted at three points across each joint. In addition, stress strain curves were obtained for plain tension specimens, and a chemical analysis was made of the sheet.
Date:
November 1923
Creator:
Rettew, H. F. & Thumin, G.
System:
The UNT Digital Library
Wind Tunnel Tests of Five Strut Sections in Yaw
In the first series of wind tunnel tests, the drag and cross wing force of all the struts were measured at a wind speed of 30 mph and at angles of yaw from 0 degrees to 20 degrees. To determine the magnitude of the VL effect, each strut was tested at zero yaw and at a series of speeds ranging from 15 to 38 mph. Although designed as fairings for cables, part of these sections gave such high crosswind forces that they seemed to have possibilities as airfoils.
Date:
November 1923
Creator:
Warner, Edward P.
System:
The UNT Digital Library
The American Airship ZR-3
This airship was built by the Zeppelin Airship Company at Friedrichshafen in 1923-4, for the United States Navy, as the reparations service of the German Government in fulfillment of the treaty of peace. A description of the design, components, flight characteristics, blueprints, and photographs are provided.
Date:
November 1924
Creator:
Dürr, L.
System:
The UNT Digital Library
Effect of Altitude on Power of Aviation Engines
"These notes are intended to furnish practical and general data on the effect of altitude on engine power. The effective horsepower of an engine is a function of the mean pressure of the fluid acting on the pistons, of the R.P.M. of the engine and of the mechanical efficiency" (p. 1).
Date:
November 1924
Creator:
Raffaelli, Italo
System:
The UNT Digital Library
The Simplifying Assumptions, Reducing the Strict Application of Classical Hydrodynamics to Practical Aeronautical Computations
Note presenting a general method followed to simplify the numerical work in hydrodynamics, which consists of neglecting quantities of a lower order of magnitude. Four of the solutions covered in this report include the theory of the lateral air forces on airship hulls, theory of wing sections in a two-dimensional flow, theory of wings with a finite span, and propeller theory.
Date:
November 1924
Creator:
Munk, Max M.
System:
The UNT Digital Library
Stieber Dynamometer Hub for Aircraft Propellers
The knowledge gained from previous experiments and reports was utilized for the construction of a dynamometer hub for 200 mkg (134.4 ft.-lb.) and 1200 kg (2646 lb.) thrust suited for a Liberty "12" engine. A reversing device is also described.
Date:
November 1924
Creator:
Stieber, W.
System:
The UNT Digital Library
Structural Weight of Aircraft as Affected by the System of Design
Various details of design or arrangement of the parts of airplane structures are shown and discussed, the use of these devices having resulted in the production of structures of adequate strength, yet of a weight less than one-half of the usual construction.
Date:
November 1924
Creator:
Hall, Charles Ward
System:
The UNT Digital Library
Tests on Duralumin Columns for Aircraft Construction
The following paper is based on the results of tests, upon duralumin columns, contained in two theses presented to the Department of Civil and Sanitary Engineering of the Massachusetts Institute of Technology.
Date:
November 1924
Creator:
Lee, John G.
System:
The UNT Digital Library
Two-Seat Light Airplanes Which Participated in Contest Held at Lympne, England, Week of September 29 to October 4, 1924
Memorandum presenting a description of a competition to produce an airplane suitable for school work. The characteristics evaluated included the speed range, take off, landing, reliability, and high and low speed are provided. A variety of monoplanes and biplanes were entered and a description of each and their blueprints are provided.
Date:
November 1924
Creator:
unknown
System:
The UNT Digital Library
An Altitude Chamber for the Study and Calibration of Aeronautical Instruments
"The design and construction of an altitude chamber, in which both pressure and temperature can be varied independently, was carried out by the NACA at the Langley Memorial Aeronautical Laboratory for the purpose of studying the effects of temperature and pressure on aeronautical research instruments. Temperatures from +20c to -50c are obtained by the expansion of CO2from standard containers. The chamber can be used for the calibration of research instruments under altitude conditions simulating those up to 45,000 feet" (p. 1).
Date:
November 1925
Creator:
Reid, H. J. E. & Kirchner, Otto E.
System:
The UNT Digital Library
A Method for the Direct Determination of Wing-Section Drag
In order that the method may be more easily understood, we will first consider the simpler case when there is no lift, but only drag, and when the streamlines at the measuring point behind the obstacle are nearly parallel. Moreover, the flow is assumed not to deviate much from the two-dimensional flow.
Date:
November 1925
Creator:
Betz, A.
System:
The UNT Digital Library
Recent Progress in the Theoretical Deduction of Airplane Wings
The designing of an airplane requires an accurate knowledge of the aerodynamic properties of its wings, as expressed in the polar diagram. It is important to continue the theoretical researches on the aerodynamic phenomena of wings, in order to determine by calculation, their fundamental characteristics and to increase and formulate our knowledge in this field.
Date:
November 1925
Creator:
Panetti, M.
System:
The UNT Digital Library