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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Testing airplanes in flight: determining position of resultant of action of air and longitudinal stability of an airplane at different angles of attack

Testing airplanes in flight: determining position of resultant of action of air and longitudinal stability of an airplane at different angles of attack

Date: April 1, 1922
Creator: Senouque, A
Description: Measurements made during flight with the triple recording device which gives the horizontal and vertical speeds of an airplane and the angle it makes with the horizon, render it possible to calculate its lift, its drag, and R the resultant of the action of the air both in magnitude and direction, but with these data alone, it is impossible to determine the position of this resultant in the plane of symmetry of the airplane. We will also see how we may determine the position of R during flight and then calculate the variations in the stability of an airplane.
Contributing Partner: UNT Libraries Government Documents Department
Testing balloon gas

Testing balloon gas

Date: January 1, 1920
Creator: Edwards, Junius David
Description: In the generation, storage, and use of hydrogen for balloon purposes it is necessary to be able to determine, first, its lifting power, and, secondly, its purity. The lifting power may be determined directly from the specific gravity. Contamination by other gases may be determined by analysis for oxygen, carbon dioxide, etc., by the usual methods of gas analysis. The determination of oxygen is important, since the presence of oxygen in amounts beyond certain limits will make the compressing, handling, and use of the gas hazardous. If the specific gravity of the gas is known, however, it may not be necessary to analyze the gas for oxygen and other gases, because the specific gravity in itself is a delicate criterion of the purity of hydrogen. Report describes a simple, portable apparatus for testing hydrogen, with special reference to its use in balloons.
Contributing Partner: UNT Libraries Government Documents Department
The testing of airplane fabrics

The testing of airplane fabrics

Date: November 1, 1932
Creator: Schraivogel, Karl
Description: This report considers the determining factors in the choice of airplane fabrics, describes the customary methods of testing and reports some of the experimental results. To sum up briefly the results obtained with the different fabrics, it may be said that increasing the strength of covering fabrics by using coarser yarns ordinarily offers no difficulty, because the weight increment from doping is relatively smaller.
Contributing Partner: UNT Libraries Government Documents Department
The testing of aviation engines

The testing of aviation engines

Date: December 1, 1924
Creator: Dubois, R N
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The testing of balloon fabrics

The testing of balloon fabrics

Date: January 1, 1920
Creator: Edwards, Junius David & Moore, Irwin L
Description: Report describes methods and materials used in waterproofing and fireproofing airplane fabrics using dopes. The determination of the probable life of a balloon fabric in service by experimental means is of great value in choosing the most suitable fabrics for a given purpose and in pointing the way to improvements in compounding and construction. The usefulness of exposure to the weather for this purpose has been amply demonstrated. Various attempts have been made to reproduce by artificial means the conditions promoting deterioration in service, but without marked success. Exposure to the weather remains the most satisfactory method for this purpose, and a consideration of the characteristics of such tests is therefore important. This report presents the results of a typical series of exposure tests made in 1917.
Contributing Partner: UNT Libraries Government Documents Department
Testing of Containment Capabilities of Reinforced Concrete-Shielded Enclosures

Testing of Containment Capabilities of Reinforced Concrete-Shielded Enclosures

Date: March 1963
Creator: Fistedis, S. H.; Heineman, A. H. & Janicke, M. J.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Testing of Fire-Clay Brick with Special Reference to their Use in Coal-Fired Boiler Settings

Testing of Fire-Clay Brick with Special Reference to their Use in Coal-Fired Boiler Settings

Date: February 13, 1925
Creator: Geller, R. F.
Description: Technical paper issued by the Bureau of Standards over studies conducted on fire-clay bricks. The results of the studies are discussed. This paper includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
The Testing of Glass Volumetric Apparatus

The Testing of Glass Volumetric Apparatus

Date: 1908
Creator: Osborne, N. S. & Veazey, B. H.
Description: Report issued by the Bureau of Standards over testing conducted on volumetric glass apparatus. Types of glass apparatus being tested are presented and discussed. The results of the testing are also discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Testing of high-octane fuels in the single-cylinder airplane engine

Testing of high-octane fuels in the single-cylinder airplane engine

Date: February 1, 1940
Creator: Seeber, Fritz
Description: One of the most important properties of aviation fuels for spark-ignition engines is their knock rating. The CFR engine tests of fuels of 87 octane and above does not always correspond entirely to the actual behavior of these fuels in the airplane engine. A method is therefore developed which, in contrast to the octane number determination, permits a testing of the fuel under various temperatures and fuel mixture conditions. The following reference fuels were employed: 1) Primary fuels; isooctane and n-heptane; 2) Secondary fuels; pure benzene and synthetic benzine.
Contributing Partner: UNT Libraries Government Documents Department
Testing of Metal Volumetric Standards

Testing of Metal Volumetric Standards

Date: April 1, 1963
Creator: Hughes, J. C. & Keysar, B. C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department