National Advisory Committee for Aeronautics (NACA) - 13,806 Matching Results

Search Results

Fabric fastenings

Description: The study of aeronautical fabrics has led to a consideration of the best methods of attaching and fastening together such materials. This report presents the results of an investigation upon the proper methods of attaching fabrics to airplane wings. The methods recommended in this report have been adopted by the military services.
Date: 1920
Creator: Walen, E. D. & Fisher, R. T.
Partner: UNT Libraries Government Documents Department

The ferrosilicon process for the generation of hydrogen

Description: Report describes the generation of hydrogen by the reaction between ferrosilicon, sodium hydroxide, and water. This method known as the ferrosilicon method is especially adapted for use in the military field because of the relatively small size and low cost of the generator required to produce hydrogen at a rapid rate, the small operating force required, and the fact that no power is used except the small amount required to operate the stirring and pumping machinery. These advantages make it possible to quickly generate sufficient hydrogen to fill a balloon with a generator which can be transported on a motor truck. This report gives a summary of the details of the ferrosilicon process and a critical examination of the means which are necessary in order to make the process successful.
Date: 1920
Creator: Weaver, E. R.; Berry, W. M.; Bohnson, B. L. & Gordon, B. D.
Partner: UNT Libraries Government Documents Department

Fuselage stress analysis

Description: Report analyzes the stresses in a fuselage of the built-up type in which the shear is taken by diagonal bracing wires. Tests are conducted for landing, flying, and thrust loads.
Date: 1920
Creator: Warner, Edward P. & Miller, Roy G.
Partner: UNT Libraries Government Documents Department

Glues used in airplane parts

Description: This report was prepared for the National Advisory Committee for Aeronautics and presents the results of investigations conducted by the Forest Products Laboratory of the United States Forest Service on the manufacture, preparation, application, testing and physical properties of the different types of glues used in wood airplane parts.
Date: 1920
Creator: Allen, S. W. & Truax, T. R.
Partner: UNT Libraries Government Documents Department

Head resistance due to radiators

Description: Part 1 deals with the head resistance of a number of common types of radiator cores at different speeds in free air, as measured in the wind tunnel at the bureau of standards. This work was undertaken to determine the characteristics of various types of radiator cores, and in particular to develop the best type of radiator for airplanes. Some 25 specimens of core were tested, including practically all the general types now in use, except the flat plate type. Part 2 gives the results of wind tunnel tests of resistance on a model fuselage with a nose radiator. Part 3 presents the results of preliminary tests of head resistance of a radiator enclosed in a streamlined casing. Special attention is given to the value of wing radiator and of the radiator located in the open, especially when it is provided with a properly designed streamlined casing.
Date: 1920
Creator: Kleinschmidt, R. V. & Parsons, S. R.
Partner: UNT Libraries Government Documents Department

Heat energy of various ignition sparks

Description: From Resume: "This report describes a method developed at the Bureau of Standards for measuring the total energy liberated as heat in a spark gap by an ignition system. Since this heat energy is obtained from the electromagnetic energy stored in the windings of the magneto or coil, it is a measure of the effectiveness of the device as an electric generator." Part 2 gives the results of measurements in absolute units of the total heat supplied to a spark gap by ignition systems of different types operating at various speeds, under conditions substantially equivalent to those in the cylinder of a high-compression aviation engine.
Date: 1920
Creator: Silsbee, F. B.; Loeb, L. B. & Fonseca, E. L.
Partner: UNT Libraries Government Documents Department

Investigation of the muffling problem for airplane engines

Description: The experimentation presented in this report falls in two divisions: first, the determination of the relation between back pressure in the exhaust line and consequent power loss, for various combinations of speed and throttle positions of the engine; second, the construction and trial of muffler designs covering both type and size. Report deals with experiments in the development of a muffler designed on the principle which will give the maximum muffling effect with a minimum loss of power. The main body of the work has been done on a Curtiss OX eight-cylinder airplane engine, 4 by 5 inches, rated 70 horsepower at 1,200 revolutions per minute. For estimation of the muffling ability and suppression of "bark" of individual exhausts, the "Ingeco" stationary, single cylinder, 5 1/2 by 10 inch, throttling governed gasoline engine, and occasionally other engines were used.
Date: 1920
Creator: Upton, G. B. & Gage, V. R.
Partner: UNT Libraries Government Documents Department

Nomenclature for aeronautics

Description: Report defines the principal terms which have come into use in the development of aeronautics. It was prepared in cooperation with a committee engaged upon a similar undertaking in Great Britain. As a result this nomenclature is in substantial agreement with the one which has been adopted by the aeronautical authorities of Great Britain.
Date: 1920
Partner: UNT Libraries Government Documents Department

On the elementary relation between pitch, slip, and propulsive efficiency

Description: The author examines the current theory on the importance of reducing slip in airplane propellers. The author feels an exaggerated importance is attached to this supposition and feels that the increase in friction by an increase in propeller area or number of revolutions can't be discounted.
Date: 1920
Creator: Froude, W.
Partner: UNT Libraries Government Documents Department

The Parker variable camber wing

Description: This report deals with the problem of increasing the speed range of an airplane by varying the camber of a wing surface. The variable camber wing offers many advantages over the variable incidence type of speed range.
Date: 1920
Creator: Parker, H. F.
Partner: UNT Libraries Government Documents Department

Power characteristics of fuels for aircraft engines

Description: Report presents the summation of results obtained in the testing of fuels of various compositions and characteristics in the altitude laboratory. The data upon which this report is based has had an important influence upon the writing of specifications for the various grades of aviation fuels.
Date: 1920
Creator: Dickinson, H. C.; James, W. S.; Roberts, E. W.; Gage, V. R. & Harper, D. R. III
Partner: UNT Libraries Government Documents Department

Preliminary report on free flight tests

Description: Results are presented for a series of tests made by the Advisory Committee's staff at Langley Field during the summer of 1919 with the objectives of determining the characteristics of airplanes in flight and the extent to which the actual characteristics differ from those predicted from tests on models in the wind tunnel, and of studying the balance of the machines and the forces which must be applied to the controls in order to maintain longitudinal equilibrium.
Date: 1920
Creator: Warner, E. P. & Norton, F. H.
Partner: UNT Libraries Government Documents Department

Properties and preparation of ceramic insulators for spark plugs

Description: Report describes in detail the preliminary experiments which were made on the conductivity of spark-plug insulators in order to develop a satisfactory comparative method for testing various spark-plug materials. Materials tested were cements, porcelain, feldspar, and quartz.
Date: 1920
Creator: Silsbee, F. B.; Honaman, R. K.; Fonseca, E. L.; Bleininger, A. V. & Staley, H.F.
Partner: UNT Libraries Government Documents Department

Results of tests on radiators for aircraft engines

Description: Part 1 is to present the results of tests on 56 types of core in a form convenient for use in the study of the performance of and possible improvements in existing designs. Working rules are given by which the data contained in the report may be used, and the most obvious conclusions as to the behavior of cores are summarized. Part 2 presents the results of tests made to determine the pressure necessary to produce water flows up to 50 gallons per minute through an 8-inch square section of radiator core. These data are of special value in evaluating the hydraulic head against which the circulating pump is required to operate.
Date: 1920
Creator: Dickinson, H. C.; James, W. S. & Kleinschmidt, R. V.
Partner: UNT Libraries Government Documents Department

Self-luminous materials

Description: Report outlines specifications for the preparation and application of self-luminous materials to be used for the illumination of various instruments, especially those used for aeronautics.
Date: 1920
Creator: Dorsey, N. E.
Partner: UNT Libraries Government Documents Department

Spark plug defects and tests

Description: The successful operation of the spark plug depends to a large extent on the gas tightness of the plug. Part 1 of this report describes the method used for measuring the gas tightness of aviation spark plugs. Part 2 describes the methods used in testing the electrical conductivity of the insulation material when hot. Part 3 describes the testing of the cold dielectric strength of the insulation material, the resistance to mechanical shock, and the final engine test.
Date: 1920
Creator: Silsbee, F. B.; Loeb, L. B.; Sawyer, L. G.; Fonseca, E. L.; Dickinson, H. C. & Agnew, P. G.
Partner: UNT Libraries Government Documents Department

The strength of one-piece solid, build-up and laminated wood airplane wing beams

Description: The purpose of this report is to summarize the results of all wood airplane wing beams tested to date in the Bureau of Standards Laboratory in order that the various kinds of wood and methods of construction may be compared. All beams tested were of an I section and the majority were somewhat similar in size and cross section to the front wing beam of the Curtiss JN-4 machine. Construction methods may be classed as (1) solid beams cut from solid stock; (2) three-piece beams, built up of three pieces, web and flanges glued together by a tongue-and-groove joint and (3) laminated beams built up of thin laminations of wood glued together.
Date: 1920
Creator: Nelson, John H.
Partner: UNT Libraries Government Documents Department

The structure of airplane fabrics

Description: This report prepared by the Bureau of Standards for the National Advisory Committee for Aeronautics supplies the necessary information regarding the apparatus and methods of testing and inspecting airplane fabrics.
Date: 1920
Creator: Walen, E. Dean
Partner: UNT Libraries Government Documents Department

A study of airplane engine tests

Description: This report is a study of the results obtained from a large number of test of an Hispano-Suiza airplane engine in the altitude laboratory of the Bureau of Standards. It was originally undertaken to determine the heat distribution in such an engine, but many other factors are also considered as bearing on this matter.
Date: 1920
Creator: Gage, Victor R.
Partner: UNT Libraries Government Documents Department

A study of airplane ranges and useful loads

Description: This report is an analysis of the maximum flight radii of typical large airplanes and a discussion of the way in which the possible length of flight is affected by the change of weight by consumption of fuel during the flight.
Date: 1920
Creator: Coffin, J. G.
Partner: UNT Libraries Government Documents Department

The subsidiary gap as a means for improving ignition

Description: This report presents the results of an investigation into the utility, action, and design of the auxiliary spark gap as a means for insuring freedom from spark plug failure due to fouling, and also to enable the restarting of fouled plugs. A brief account is given of the use of this gap up to the present time and also of the statements concerning it which have gained some currency, most of which are shown to be erroneous. The simple theory of the action of the series gap is discussed and a detailed account given of the effect upon the sparking ability of the plug produced by changes in the values of the electrical resistance of the fouling and of the capacities in parallel with the plug and with the magneto or coil.
Date: 1920
Creator: Gorton, W. S.
Partner: UNT Libraries Government Documents Department