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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Technical Reports
 Collection: Technical Report Archive and Image Library
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
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
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
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