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Distant-Compass

Description: Report presenting a description of fluid compasses that are being used in aircraft, including why magnetic compasses are not usable. Details of the distant compass are provided, which is an improved form of the compass that has a practical application in seaplanes.
Date: June 1921
Creator: Friedensburg, Walter & Miner, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Choice of Profile for the Wings of an Airplane Part 2

Description: This report gives a general method for drawing airplane profiles. This method is useful, but it leads to a somewhat laborious drawing which becomes quite complicated when we take a transformation function having terms of a high degree.
Date: June 1928
Creator: Toussaint, A. & Carafoli, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Frictionless Flow in the Region Around Two Circles

Description: This investigation attempts to surpass the boundaries of pure mathematical interest in that it possesses as an example, a flow investigation in a multiply-connected region. Then the results appear to be carried out by means of an appropriate conformal representation of the region around two chosen closed curves. Thus we have the basis of an exact plane theory of the biplane.
Date: June 1931
Creator: Lagally, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Report on Commercial Air Transportation Activities in England, France, Germany and Holland

Description: The following pages present a review of the air transportation activities of England, France, Germany and Holland, based on an inspection trip during the summer of 1924. The different components described include operating companies, nature of transportation services, air traffic, flying equipment, government relations, and general remarks.
Date: June 1925
Creator: Van Zandt, J. Parker
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wood Versus Metal in Airplane Construction

Description: The aim of this article is to present, in broad outline, a scientific method for solving the problem, "Wood or Metal." It will be shown that structural methods have by no means reached their final perfection. The strength of the different materials is discussed as well as different construction methods.
Date: June 1923
Creator: Seehase, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

"Gloster" Metal Construction

Description: This report details the methods of construction employed by the Gloster Company in their fabrication of metal aircraft parts. Ribs, spars, wings, and metal treatments to prevent oxidation are all discussed.
Date: June 1930
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Force Measurements on Airplanes

Description: The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
Date: June 1929
Creator: Seewald, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Trend to Be Given Aerodynamical Research and Experiment

Description: The causes of error in experiments conducted in wind tunnel tests are given and the value of in-flight tests are promoted. The four main causes explored include neglect of the laws of dynamic similitude, interference between the support and the model, nature of the air stream, and the influence of the walls of the tunnel.
Date: June 1923
Creator: Lèpere, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Airfoil Theory at Supersonic Speed

Description: From Summary: "A theory is developed for the airfoil of finite span at supersonic speed analogous to the Prandtl airfoil theory of 1918-1919 for incompressible flow. In addition to the profile and induced drags, account must be taken at supersonic flow of still another drag, namely, the wave drag, which is independent of the wing aspect ratio. Both wave and induced drags are proportional to the square of the lift and depend on the Mach number, that is, the ratio of flight to sound speed. In gen… more
Date: June 1939
Creator: Schlichting, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The "Turkey Buzzard" Glider

Description: The "Turkey Buzzard" is a semi-internally braced monoplane (Fig. 1). The wing is placed above the fuselage for two important aerodynamical reasons: first, because this position minimizes the mutual interference between the wing and the fuselage, and, second, useful lifting surface is utilized with the wing passing over the fuselage instead of through it.
Date: June 1923
Creator: Miller, Roy G. & Brown, B. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Velocity Wind Tunnels: Their Application to Ballistics, Aerodynamics, and Aeronautics

Description: "The object of this article is to set forth the particular properties of swiftly-moving air, how these affect the installation of a wind tunnel, the experimental results already obtained, the possible applications of such a tunnel, and what can be easily accomplished at the present time" (p. 1).
Date: June 1925
Creator: Huguenard, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Landing Impact of Seaplanes

Description: The theory of landing impact is briefly stated and the applicability of a previously suggested formula is extended. Theoretical considerations regarding impact measurements on models and actual seaplanes are followed by a brief description of the instruments used in actual flight tests. The report contains a description of the strength conditions and deals exhaustively with force measurements on the float gear of an "HE 9a" with flat-bottom and with V-bottom floats. The experimental data are gi… more
Date: June 1931
Creator: Pabst, Wilhelm
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

"Schneebeli" and "Birger" Silencers

Description: The Schneebeli silencer is made entirely of soft sheet steel. It is connected with the engine for receiving the exhaust gases, and consists of two parts: the silencer proper and a conical exit. The Birger silencer, made by the Ad Astra Company in Switzerland, is based on the principle of rapid cooling of the exhaust gases.
Date: June 1923
Creator: Dollfus, Charles
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Stabilizing Forces on Turbulence

Description: The appearance of expressed discontinuity layers in the free atmosphere, where a warm air mass flows over a cold mass without perceptible intermingling forms the basis of the present report. In these experiments an air stream is to be blown between a water-cooled and a vapor-heated plate. According to what preceded it is anticipated that the exchange will be enhanced.
Date: June 1931
Creator: Prandtl, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Possible Method for Preventing the Autorotation of Airplane Wings

Description: "At the suggestion of Professor Betz, the following device was tested with the object of reducing the autorotational speed of airplane wings. The model of a normal wing with the Gottigen profile 420, 1 meter span and 0.2 meter chord was provided with a pair of symmetrical slots on the suction side, connected with each other inside the wing. The arrangement of the testing equipment and models are given and the effect of the slots can be seen in the experimental curves that are included" (p. 1).
Date: June 1930
Creator: Schrenk, Oskar
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wood Versus Metal in Airplane Construction

Description: The aim of this article is to present, in broad outline, a scientific method for solving the problem, "Wood or Metal." It will be shown that structural methods have by no means reached their final perfection. The strength of the different materials is discussed as well as different construction methods.
Date: June 1923
Creator: Seehase, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Controls of an Airplane

Description: The control of an airplane is discussed beginning with sideways motion and following up with control by weight shifting and by swinging wing tips.
Date: June 1923
Creator: Warner, Edward P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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