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"Am" Gasoline Cock

Description: The "AM" cock was designed specially for gasoline pipes on vehicles using internal combustion engines (airplanes, airships, automobiles, tractors, battle "tanks", boats, etc.). The report descirbes the functioning and construction of the device.
Date: February 1923
open access

Fixed Air-Cooled Engines

Description: "It is proposed to analyze the advantages and disadvantages of large fixed air-cooled radial engines and to explain how the problems have been solved by the Bristol Aeroplane Company" (p. 1).
Date: February 1923
Creator: Fedden, A. H.
open access

Graetzin Special Carburetor

Description: Corresponding to practical requirements, this carburetor (especially the smaller sizes) may be regarded as the smallest form of a float carburetor and is adapted for use with all small engines, including auxiliary bicycle and similar engines.
Date: February 1923
open access

Longitudinal Balancing of Airplanes

Description: The object of the present communication is to determine the best method for locating the center of lift of an airplane and to provide a method for making corrections. The method employed is very simple, being based on the positions given the elevator during flights at different speeds.
Date: February 1923
Creator: Eteve, Albert
open access

Model Supports and Their Effects on the Results of Wind Tunnel Tests

Description: "The airflow about a model while being tested is often sufficiently affected by the model support to lead to erroneous conclusions unless appropriate corrections are used. In this paper some new material on the subject is presented, together with a review of the airfoil support corrections used in several other laboratories" (p. 1).
Date: February 1923
Creator: Bacon, David L.
open access

Soaring Without Rising Currents

Description: Memorandum describing the main problem of soaring flight, which is that it is difficult to maintain altitude and to engage in indefinite continuation of flight without dependence on rising currents from any source. The best chance of success involves utilizing energy stored in the air when the wind speed is constantly and rapidly varying.
Date: February 1923
Creator: Warner, Edward P.
open access

Tests on an Airplane Model, AEG D I of the Allgemeine Elektricitats Gesellschft, A-G, Airplane Construction Section Conducted at the Gottingen Model Testing Laboratory for Aerodynamics

Description: "Tests were carried out in the small wind tunnel of the Gottingen establishment on a complete model of the AEG D I airplane. The agreement between the model and the complete airplane applies particularly to the wings, which have ribs cut out of sheet metal and built up in exactly the same manner as in the actual airplane. Various series of tests were carried out with this model in which one or the other of the control surfaces were adjusted to various angles, while the others remained in their … more
Date: February 1923
Creator: Munk, Max & Molthan, Wilhelm
open access

Aeronautic Instruments

Description: "The development of aeronautic instruments. Vibrations, rapid changes of the conditions of flight and of atmospheric conditions, influence of the air stream all call for particular design and construction of the individual instruments. This is shown by certain examples of individual instruments and of various classes of instruments for measuring pressure, change of altitude, temperature, velocity, inclination and turning or combinations of these" (p. 1).
Date: February 1924
Creator: Everling, E. & Koppe, H.
open access

Increasing the Compression Pressure in an Engine by Using a Long Intake Pipe

Description: "During some tests of a one-cylinder engine, using gas oil (diesel engine oil, specific gravity 0.86 at 60 F) with solid injection and compression ignition, it was found to be necessary to increase either the jacket water temperature or the compression pressure in order to start the engine. It was found that a sufficient increase in compression pressure could be obtained simply by attaching a long pipe to the inlet flange of the cylinder. However, since no data were available giving the values … more
Date: February 1924
Creator: Matthews, Robertson & Gardiner, Arthur W.
open access

Induced Drag of Multiplanes

Description: "The most important part of the resistance or drag of a wing system, the induced drag, can be calculated theoretically, when the distribution of lift on the individual wings is known. The calculation is based upon the assumption that the lift on the wings is distributed along the wing in proportion to the ordinates of a semi-ellipse. Formulas and numerical tables are given for calculating the drag. In this connection, the most favorable arrangements of biplanes and triplanes are discussed and t… more
Date: February 1924
Creator: Prandtl, L.
open access

Interference of Multiplane Wings Having Elliptical Lift Distribution

Description: In calculating the self-induction of a wing surface, elliptical lift distribution is assumed, while in calculating the mutual induction or interference of two wing surfaces, a uniform distribution of the lift along the wing has hitherto been assumed. Whether the results of these calculations are substantially altered by assuming an elliptical lift distribution (which is just as probable as uniform distribution) is examined here.
Date: February 1924
Creator: von Sanden, H.
open access

Magnan Glider M-2

Description: The construction of the Magnan glider, M-2, is presented which is designed to fly in so-called horizontal winds. Details of the wings, fuselage, tail surfaces, controls, landing gear, characteristics, operation, photographs, and drawings are provided.
Date: February 1924
Creator: Lesage, M. André
open access

Practical Method for Balancing Airplane Moments

Description: "The present contribution is the sequel to a paper written by Messrs. R. Fuchs, L. Hopf, and H. Hamburger, and proposes to show that the methods therein contained can be practically utilized in computations. Furthermore, the calculations leading up to the diagram of moments for three airplanes, whose performance in war service gave reason for complaint, are analyzed. Finally, it is shown what conclusions can be drawn from the diagram of moments with regard to the defects in these planes and wha… more
Date: February 1924
Creator: Hamburger, H.
open access

Specializing for Record-Breaking

Description: This report seeks to determine what constitutes airplane performance and what line should be followed in seeking to break records if the designer is given a free hand. Some of the considerations for designers include the ratio of engine power to wing area, minor refinements, low wing loading, and duration.
Date: February 1924
Creator: Warner, Edward P.
open access

Triplane Tests

Description: "These experiments were carried out to determine the aerodynamic characteristics of various triplanes, which differed in the relative positions of the wings and, more especially, in the stagger, and in the shape of the wing sections. The tests were restricted to such dispositions as appeared constructively adapted to the plan form considered. Four different sets of wings were used in these tests, three of which had the same cross-section but differed in aspect ratio and in area" (p. 1).
Date: February 1924
Creator: Wieselsberger, C.
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