Technical Report Archive & Image Library (TRAIL) - 14 Matching Results

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Damping Coefficients Due to Tail Surfaces in Aircraft

Description: "The object of the investigation described in this report was to compare the damping coefficients of an airfoil as calculated from a knowledge of the static characteristics of the section with those obtained experimentally with an oscillation. The damping coefficients as obtained, according to the conventional notation, can be considered either as due to pitching or as due to yawing, the oscillation in these experiments being so arranged that the surfaces oscillate about a vertical axis. This i… more
Date: January 1, 1923
Creator: Chu, Lynn
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bending moments, envelope, and cable stresses in non-rigid airships

Description: This report describes the theory of calculating the principal stresses in the envelope of a nonrigid airship used by the Bureau of Aeronautics, United States Navy. The principal stresses are due to the gas pressure and the unequal distribution of weight and buoyancy, and the concentrated loads from the car suspension cables. The second part of the report deals with the variations of tensions in the car suspension cables of any type of airship, with special reference to the rigid type, due to th… more
Date: January 1923
Creator: Burgess, C. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible Improvements in Gasoline Engines

Description: High-compression engines are investigated with the three main objects being elimination of vibration, increase of maximum efficiency, and conservation of this efficiency at the highest possible speeds.
Date: January 1923
Creator: Ziembinski, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Marcel Besson Wing Sections

Description: Three different Marcel Besson airfoils are investigated in terms of maximum lift, maximum fineness, minimum required power, and wing section drag. Comparisons are then made between the three airfoils.
Date: January 1923
Creator: Delanghe, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Soaring flight and the Rhön contests

Description: Explanation of soaring flight. Static and dynamic soaring flight. Results of the Rhon contest. Description of the most important gliders. Notes on Soaring Flight Contests in France and England.
Date: January 1923
Creator: Hoff, Wilhelm
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Optical Altitude Indicator for Night Landing

Description: One of the most ingenious of the devices intended for use in night landing, especially emergency landing, is a very simple optical instrument known as the Jenkins night altitude indicator. The design and operation of this instrument, which allows a pilot to determine the altitude of the aircraft, is discussed. The author discusses various modifications and improvements that might be made to the instrument.
Date: January 1923
Creator: Warner, John A. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Downwash of Airplane Wings

Description: "The data for the calculation of the air forces acting on the elevators, obtained from previous model experiments are not immediately applicable in practice, as the angle at which the control surfaces meet the air stream is, in general, still unknown. The air stream, when it reaches the elevator has already been deflected by the wings and although the velocity imparted to the air current by the wings is of negligible amount compared with the speed of flight, the air behind the wings has been de… more
Date: January 1923
Creator: Munk, Max & Cario, Gunther
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Results of experimental flights at high altitudes with Daimler, Benz and Maybach engines to determine mixture formation and heat utilization of fuel

Description: The experimental flights described herein were made with the object of obtaining information regarding the following two questions, which as yet have not been sufficiently elucidated. These are: 1. What effect has altitude upon the formation of the mixture? 2. What alteration takes place, with increasing altitude, in the utilization of the heat contained in the fuel?.
Date: January 1923
Creator: Kutzbach, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Absolute Dimensions of Karman Vortex Motion

Description: Note presenting an investigation of the Karman vortex street, which is a flow arrangement occurring behind a plate. The equations governing the flow and some of the hypotheses behind it are provided.
Date: January 1923
Creator: Heisenberg, Werner
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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