Now showing items 1-20 of 231686

      • NACA-TN-84 : New data on the laws of fluid resistance 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: Thus far, all attempts at the quantitative determination of drag, on the basis of the theory of viscous fluids, have met with but slight success. For this reason, whenever a more accurate knowledge of the drag is desirable, ...
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      • NACA-TR-151 : General biplane theory 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report deals with the air forces on biplane cellule. The first part of the report deals with the two-dimensional problem neglecting viscosity. The variation of the section, chord, gap, stagger, and decalage are ...
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      • NASA-TR-D-121 : The minimum induced drag of aerofoils 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report helps explain the phenomenon of flight. It contains some theorems concerning the arrangement of airplane wings which are of considerable practical interest. In particular, it shows the theoretical reasons for ...
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      • NACA-TN-167 : Wind tunnel tests of five strut sections in yaw 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: In the first series of wind tunnel tests, the drag and cross wing force of all the struts were measured at a wind speed of 30 mph and at angles of yaw from 0 degrees to 20 degrees. To determine the magnitude of the VL ...
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      • NACA-TR-116 : Applications of modern hydrodynamics to aeronautics 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: The report gives, rather briefly, in part one an introduction to hydrodynamics which is designed to give those who have not yet been actively concerned with this science such a grasp of the theoretical underlying principles ...
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      • NACA-TR-147 : Standard atmosphere 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report was prepared at the request of the National Advisory Committee for Aeronautics and discusses the need of a standard set of values of pressure, temperature and density at various altitudes and points out the ...
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      • NACA-TR-184 : The aerodynamic forces on airship hulls 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report describes the new method for making computations in connection with the study of rigid airship, which was used in the investigation of the navy's ZR-1 by the special subcommittee of the National Advisory Committee ...
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      • NACA-TN-182 : Induced drag of multiplanes 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: 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 ...
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      • IEC 60028 : English -- International standard of resistance for copper - Edition 2 

        Organization: IEC - International Electrotechnical Commission;
        Abstract: PREFACE TO SECOND EDITION
        The purpose of this edition is not to change in any way the substance of the original recommendations but only to re-state them in a manner which renders them free from ambiguity ...
        Download English, French 1925
      • NACA-TR-210 : Inertia factors of ellipsoids for use in airship design 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report is based on a study made by the writer as a member of the Special Committee on Design of Army Semirigid Airship RS-1 appointed by the National Advisory Committee for Aeronautics. The increasing interest in ...
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      • NACA-TR-253 : Flow and drag formulas for simple quadrics 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report gives the pressure distribution and resistance found by theory and experiment for simple quadrics fixed in an infinite uniform stream of practically incompressible fluid. The experimental values pertain to air ...
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      • NACA-TM-490 : Structures of Thin Sheet Metal Their Design and Construction 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report presents a brief survey of the uses of sheet-metal coverings in conjunction with the inner structure. A method of construction is presented as well as a discussion on the strength of sheet metal.
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      • NACA-TR-267 : Drag of wings with end plates 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: In this report a formula for calculating the induced drag of multiplanes with end plates is derived. The frictional drag of the end plates are used, is sufficiently large to increase the efficiency of the wing. Curves ...
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      • NACA-TR-273 : Wind tunnel tests on autorotation and the "flat spin" 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report deals with the autorotational characteristics of certain differing wing systems as determined from wind tunnel tests made at the Langley Memorial Aeronautical Laboratory. The investigation was confined to ...
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      • NACA-TR-289 : Forces on elliptic cylinders in uniform air stream 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report presents the results of wind tunnel tests on four elliptic cylinders with various fineness ratios, conducted in the Navy Aerodynamic Laboratory, Washington. The object of the tests was to investigate the ...
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      • NACA-TR-317 : Wind tunnel tests on a series of wing models through a large angle of attack range. Part I : force tests 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This investigation covers force tests through a large range of angle of attack on a series of monoplane and biplane wing models. The tests were conducted in the atmospheric wind tunnel of the National Advisory Committee ...
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      • NACA-TM-606 : Flat Sheet Metal Girders With Very Thin Metal We 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: This report continues the work presented in NACA-TM 605 and expands the scope to include the change in specific number of wrinkles from direction x to z, so that b and f become variable in direction z. Moreover, it seems ...
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      • NACA-TM-605 : Flat Sheet Metal Girders With Very Thin Metal We 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: Noting that the stiffness of the girder increases very rapidly as Beta increases, the result can be summed up as follows: When the cross stress preponderates in one direction and when the web plate is to be given the ...
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      • NACA-TM-604 : Flat Sheet Metal Girdes With Very Thin Metal We 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: The object of this report was to develop the structural method of sheet metal girders and should for that reason be considered solely from this standpoint. The ensuing methods were based on the assumption of the infinitely ...
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      • NACA-TM-630 : The steady spin 

        Organization: NASA - National Aeronautics and Space Administration (NASA);
        Abstract: With the object of further clarifying the problem of spinning, the equilibrium of the forces and moments acting on an airplane is discussed in light of the most recent test data. Convinced that in a spin the flight attitude ...
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