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 Collection: National Advisory Committee for Aeronautics Collection
The airplane tensiometer

The airplane tensiometer

Date: January 1, 1920
Creator: Larson, L J
Description: Certain parts of an airplane are subjected not only to the stresses imposed by the aerodynamic or flying load, but also to the initial stresses, caused by the tension in the stay and drift wires. Report describes a tensiometer that measures such stresses which is simple in construction, accurate, and easily and quickly operated even by inexperienced persons. Two sizes of the instrument are available. One is suitable for wires up to one-fourth inch in diameter and the other for wires from one-fourth to three-eights inch in diameter.
Contributing Partner: UNT Libraries Government Documents Department
The altitude laboratory for the test of aircraft engines

The altitude laboratory for the test of aircraft engines

Date: January 1, 1920
Creator: Dickinson, H C & Boutell, H G
Description: Report presents descriptions, schematics, and photographs of the altitude laboratory for the testing of aircraft engines constructed at the Bureau of Standards for the National Advisory Committee for Aeronautics.
Contributing Partner: UNT Libraries Government Documents Department
Aluminum and its light alloys

Aluminum and its light alloys

Date: January 1, 1920
Creator: Merica, Paul D
Description: Report is a summary of research work which has been done here and abroad on the constitution and mechanical properties of the various alloy systems with aluminum. The mechanical properties and compositions of commercial light alloys for casting, forging, or rolling, obtainable in this country are described.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (4th).administrative report including Technical Reports nos. 24 to 50

Annual report of the National Advisory Committee for Aeronautics (4th).administrative report including Technical Reports nos. 24 to 50

Date: January 1, 1920
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, problems, recommendations, and a compilation of technical reports produced.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (5th).administrative report including Technical Reports nos. 51 to 82

Annual report of the National Advisory Committee for Aeronautics (5th).administrative report including Technical Reports nos. 51 to 82

Date: January 1, 1920
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, and a compilation of technical reports produced.
Contributing Partner: UNT Libraries Government Documents Department
Bomb trajectories

Bomb trajectories

Date: January 1, 1920
Creator: Wilson, Edwin Bidwell
Description: The report is a mathematical treatise dealing with the trajectories of bombs of high terminal velocity, dropped from a great altitude.
Contributing Partner: UNT Libraries Government Documents Department
Calculation of low-pressure indicator diagrams

Calculation of low-pressure indicator diagrams

Date: January 1, 1920
Creator: Kemble, E C
Description: Report develops a fundamental conception and partial application of a method for calculating the pressure-volume relationships to be expected for any given engine design. It outlines a method of computing and interpreting low-pressure indicator cards.
Contributing Partner: UNT Libraries Government Documents Department
Carbureting conditions characteristics of aircraft engines

Carbureting conditions characteristics of aircraft engines

Date: January 1, 1920
Creator: Tice, Percival S
Description: Tests were conducted at the altitude laboratory erected at the Bureau of Standards for the National Advisory Committee for Aeronautics to determine the changes in engine performance with changes in atmospheric temperature and pressure at various levels above the earth's surface, with special reference to (a) the variables affecting the functioning of the carburetor and (b) the changes in performance resulting from variables in the carburetor itself. This report constitutes a concise statement of the difficulties to be encountered in this branch of carburetion.
Contributing Partner: UNT Libraries Government Documents Department
Characteristics of high-tension magnetos

Characteristics of high-tension magnetos

Date: January 1, 1920
Creator: Silsbee, F. B.
Description: This report gives the results of an investigation made into the fundamental physical characteristics of high-tension ignition magnetos, and also describes the methods used for measuring the quantities involved.
Contributing Partner: UNT Libraries Government Documents Department
Comparison of United States and British standard pitot tubes

Comparison of United States and British standard pitot tubes

Date: January 1, 1920
Creator: Zahm, A. F. & Smith, R. H.
Description: The results shown in this report give a comprehensive comparison of the accuracy of United States and British standard pitot tubes.
Contributing Partner: UNT Libraries Government Documents Department
Construction of models for tests in wind tunnels

Construction of models for tests in wind tunnels

Date: January 1, 1920
Creator: Norton, F H
Description: Report deals with the methods of constructing aerofoils and all other parts of a model airplane, including discussion of the degree of accuracy.
Contributing Partner: UNT Libraries Government Documents Department
Development of air speed nozzles

Development of air speed nozzles

Date: January 1, 1920
Creator: Zahm, A F
Description: Report describes the development of a suitable speed nozzle for the first few thousand airplanes made by the United States during the recent war in Europe, and to furnish a basis for more mature instruments in the future. Requirements for the project were to provide a suitable pressure collector for aircraft speed meters and to develop a speed nozzle which would be waterproof, powerful, unaffected by slight pitch and yaw, rugged and easy to manufacture, and uniform in structure and reading, so as not to require individual calibration.
Contributing Partner: UNT Libraries Government Documents Department
Effect of altitude on radiator performance

Effect of altitude on radiator performance

Date: January 1, 1920
Creator: James, W S & Parsons, S R
Description: As an airplane rises to high altitudes the decrease in the density and the temperature of the air have important effects on the performance of the radiator. This report gives the results of a study of the effect of reduced pressure and temperature upon the capacity of airplane radiators. A method is presented by which the performance of a radiator at an altitude may be estimated for a particular speed of the airplane at a particular altitude.
Contributing Partner: UNT Libraries Government Documents Department
The effect of kiln drying on the strength of airplane woods

The effect of kiln drying on the strength of airplane woods

Date: January 1, 1920
Creator: Wilson, T R C
Description: This report is a very complete treatise on the comparative strength of air and kiln dried wood. The series of tests includes 26 species of wood, approximately 100 kiln runs, and over 10,000 mechanical tests.
Contributing Partner: UNT Libraries Government Documents Department
Effect of temperature and pressure on the sparking voltage

Effect of temperature and pressure on the sparking voltage

Date: January 1, 1920
Creator: Loeb, L B & Silsbee, F B
Description: This report presents the results of an investigation which was to determine how the voltage necessary to produce the proper spark discharge varies with the pressure and temperature of the gas in which the discharge takes place.
Contributing Partner: UNT Libraries Government Documents Department
Experimental research on air propellers II

Experimental research on air propellers II

Date: January 1, 1920
Creator: Durand, William F & Lesley, E P
Description: This report is a continuation of NACA Technical Report 14. It presents the results of an experimental investigation on the performance of air propellers which was divided into five parts, as follows: (1) Tests under conditions of flight on 16 model propellers of different forms, sections, or pitch ratios from those of Technical Report 14; (2) Tests under conditions of flight on one model propeller of variable pitch; (3) Tests under conditions of flight on three sets of right and left hand model propellers in series; (4) Tests on 12 model propellers to determine brake effect or negative thrust at negative slip; (5) Standing thrust and power tests of 67 model propellers.
Contributing Partner: UNT Libraries Government Documents Department
Experimental research on air propellers III

Experimental research on air propellers III

Date: January 1, 1920
Creator: Durand, W F & Lesley, E P
Description: Report presents the results of wind tunnel tests of propellers that examined the influence of the following characteristics: (1) nominal pitch ratio 1.3 combined with a certain number of the more common or standard forms and proportions; (2) driving face slightly rounded or convex; (3) change in the location of the maximum thickness ordinate of the blade section; (4) pushing forward the leading edge of the blade, thus giving a rounded convex surface on the leading side of the driving face. (5) a series of values for the constant "angle of attack" in forming propellers with radially increasing pitch. In accordance with these purposes tests were carried out on 28 propellers.
Contributing Partner: UNT Libraries Government Documents Department
Fabric fastenings

Fabric fastenings

Date: January 1, 1920
Creator: Walen, E D & Fisher, R T
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.
Contributing Partner: UNT Libraries Government Documents Department
The ferrosilicon process for the generation of hydrogen

The ferrosilicon process for the generation of hydrogen

Date: January 1, 1920
Creator: Weaver, E R; Berry, W M; Bohnson, V L & Gordon, B D
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.
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Fuselage stress analysis

Fuselage stress analysis

Date: January 1, 1920
Creator: Warner, Edward P & Miller, Roy G
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.
Contributing Partner: UNT Libraries Government Documents Department
The general theory of blade screws including propellers, fans, helicopter screws, helicoidal pumps, turbo-motors, and different kinds of helicoidal blades

The general theory of blade screws including propellers, fans, helicopter screws, helicoidal pumps, turbo-motors, and different kinds of helicoidal blades

Date: January 1, 1920
Creator: De Bothezat, George
Description: Report presents a theory which gives a complete picture and an exact quantitative analysis of the whole phenomenon of the working of blade screws, but also unites in a continuous whole the entire scale of states of work conceivable for a blade screw. Chapter 1 is devoted to the establishment of the system of fundamental equations relating to the blade screw. Chapter 2 contains the general discussion of the 16 states of work which may establish themselves for a blade screw. The existence of the vortex ring state and the whirling phenomenon are established. All the fundamental functions which enter the blade-screw theory are submitted to a general analytical discussion. The general outline of the curve of the specific function is examined. Two limited cases of the work of the screw, the screw with a zero constructive pitch and the screw with an infinite constructive pitch, are pointed out. Chapter 3 is devoted to the study of the propulsive screw or propeller. (author).
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Glues used in airplane parts

Glues used in airplane parts

Date: January 1, 1920
Creator: Allen, S W & Truax, T R
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.
Contributing Partner: UNT Libraries Government Documents Department
Head resistance due to radiators

Head resistance due to radiators

Date: January 1, 1920
Creator: Kleinschmidt, R V & Parsons, S R
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.
Contributing Partner: UNT Libraries Government Documents Department
Heat energy of various ignition sparks

Heat energy of various ignition sparks

Date: January 1, 1920
Creator: Silsbee, F B; Loeb, L B & Fonseca, E L
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department