Technical Report Archive & Image Library (TRAIL) - 1,438 Matching Results

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Tin Soldering of Aluminum and Its Alloys

Description: A method is presented for soldering aluminum to other metals. The method adopted consists of a galvanic application to the surface of the light-metal parts to be soldered, of a layer of another metal, which, without reacting electrolytically on the aluminum, adheres strongly to the surface to which it is applied, and is, on the other hand, adapted to receive the soft solder. The metal found to meet the criteria best was iron.
Date: October 1921
Creator: Gallo, Gino
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Establishment of Aviation Schools

Description: Report presenting a discussion of the creation of a suitable aviation school and some of the characteristics that should be considered in terms of hiring personnel, creating a curriculum, and obtaining equipment.
Date: November 1921
Creator: Kempe, Erich
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure Measurements During Flight

Description: The general idea was to record the air pressure on the spot, that is, without intervening tubes, by some simple automatic registering device. This was therefore made in such small dimensions that it could be inserted into the wing between the ribs and stand in direct connection with the pressure openings. The results of different experiments are presented along with the best locations for locating the instruments for recording the pressure.
Date: November 1921
Creator: Pröll, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Traffic Airships With Special Reference to Economy

Description: The first part of this report details the efficiency and economy of airship travel, while the second part presents methods of economic efficiency with regards to construction, cost of upkeep and operation, and the establishment of airship lines.
Date: November 1921
Creator: Leyensetter, Walther
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dependence of Propeller Efficiency on Angle of Attack of Propeller Blade

Description: In order to determine the maximum and the most favorable pitch for a propeller, it was found desirable to investigate the dependence of propeller efficiency on the angle of attack of the propeller blade. The results of a few experiments are given to show that propeller blades conduct themselves just like airplane wings with reference to the dependence of their efficiency on their angle of attack.
Date: December 1921
Creator: Borck, Hermann
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aerial navigation : on the problem of guiding aircraft in a fog or by night when there is no visibility

Description: Report discussing the use of magnetic fields and wire to navigate aircraft in conditions of poor visibility is presented. This field may be considered to be derived from a double lemniscate, considered in the particular case where the origin is a double point formed from the magnetic field of the slack wire, from the field produced by the return currents and from the field due to the currents induced in the conducting mass. These fields are dephased in two ways, one in the direction of the wire… more
Date: January 1922
Creator: Loth, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Glider of the College Aviation Group of the Technical High School, Hanover

Description: This report presents the results of testing on a glider designed and built by the College Aviation Group. The design and construction were based on the following principles: 1) the glider will be made to descend as slowly as possible; 2) rigidity and resistance were arranged to meet the conditions of varied loads; 3) construction is as simple as possible; 4) and great ease in assembling and dismounting have been sought.
Date: January 1922
Creator: Blume, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aerial Transportation

Description: Report discussing the origin of air traffic dates from the war. The important development of aeronautic industries and the progress made in recent years, under the impelling force of circumstances, rendered it possible, after the close of hostilities, to consider the practical utilization of this new means of economic expansion.
Date: February 1922
Creator: Pierrot
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deterioration of Airplane Fabrics

Description: The observation that airplane fabrics, after long use, lose their original strength, caused the German Experimental Institute for Aviation to carry out a series of experiments on the effect of weathering on the cloth covering of airplane wings and fuselages.
Date: February 1922
Creator: Wendt, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Efficiency of a Wind Tunnel

Description: If, by some means, a steady state of motion of a perfect fluid were established in an ideal wind tunnel, there would be no losses, and the motion would persist indefinitely. In the actual tunnel, the function of the motor-fan group is overcome by the total loss of head in the tube due to friction and eddies.
Date: February 1922
Creator: Miller, William H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Manometer for Recording Air Speed

Description: If it is desired to record the pressure difference given a gauge, the manometer must answer the following conditions: 1) It must respond quickly so that all speed variations will be correctly recorded; 2) It must not be affected by rectilinear or curvelinear accelerations. Hence, movable parts must be counterbalanced. An instrument which met these criteria is discussed as well as details of construction.
Date: February 1922
Creator: Wieselsberger, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Marking Airdromes

Description: Necessity of adopting for all aviation fields, civil or military, a single system of markers for giving the direction for starting and landing (with an automatic indicator of the direction of the wind) and of indicating the good part of the field.
Date: February 1922
Creator: James, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aeronautic Insurance

Description: The problem of insuring the emerging commercial aeronautic industry is detailed. The author also motes that a complete solution cannot be obtained until the necessary statistics are compiled.
Date: March 1922
Creator: Neal, Erik
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bagnulo Heavy Fuel Internal Combustion Engine and Its Employment in Aviation

Description: We see with great satisfaction that Bagnulo's studies and experiments on his high-speed, heavy-fuel engines, promise to solve not only the general problem of economical power and hence of thermal efficiency, but also all other special problems, of weight and space, and, what is still more important, range of error.
Date: March 1922
Creator: Fiore, Amedeo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Differential Equations in Airplane Mechanics

Description: In the following report, we will first draw some conclusions of purely theoretical interest, from the general equations of motion. At the end, we will consider the motion of an airplane, with the engine dead and with the assumption that the angle of attack remains constant. Thus we arrive at a simple result, which can be rendered practically utilizable for determining the trajectory of an airplane descending at a constant steering angle.
Date: March 1922
Creator: Carleman, M. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Maps and Navigation Methods

Description: Different maps and scales are discussed with particular emphasis on their use in aviation. The author makes the observation that current navigation methods are slow and dangerous and should be replaced by scientific methods of navigation based on loxodromy and the use of the compass.
Date: March 1922
Creator: Duval, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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