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 Decade: 1920-1929
 Serial/Series Title: NACA Technical Memorandums
 Collection: Technical Report Archive and Image Library
The transformation of heat in an engine

The transformation of heat in an engine

Date: April 1, 1929
Creator: Neumann, Kurt
Description: This report presents a thermodynamic basis for rating heat engines. The production of work by a heat engine rests on the operation of supplying heat, under favorable conditions, to a working fluid and then taking it away.
Contributing Partner: UNT Libraries Government Documents Department
Effect of roughness on properties of airfoils

Effect of roughness on properties of airfoils

Date: August 1, 1926
Creator: Schrenk, O
Description: The first group of a large series of contemplated experiments on the effect of roughness was intended to show the effect of great roughness on airfoils of various sizes and attitudes.
Contributing Partner: UNT Libraries Government Documents Department
Lift theory of supporting surfaces : second article

Lift theory of supporting surfaces : second article

Date: September 1, 1921
Creator: Von Mises, R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Engines and fuels

Engines and fuels

Date: August 1, 1923
Creator: unknown
Description: The report considers the effect on engines of the varying types of fuels now in use. Different types of fuels are examined and the influence of physical characteristics are considered.
Contributing Partner: UNT Libraries Government Documents Department
Aviation spirit - past, present, and future

Aviation spirit - past, present, and future

Date: September 1, 1923
Creator: Dunstan, A E & Thole, F B
Description: The volatile fuel of the high-speed internal combustion engine has, in the past, consisted almost exclusively of the lighter distillates from crude petroleum. Alternative and supplementary fuels are discussed such as: tetraline, dekalin, alcohol, cyclo-hexenes.
Contributing Partner: UNT Libraries Government Documents Department
Lautal as a material for airplane construction

Lautal as a material for airplane construction

Date: August 1, 1929
Creator: Brenner, Paul
Description: Lautal is a refinable aluminum alloy which, unlike duralumin, contains no magnesium. According to the statements of the Lauta Works, lautal contains: aluminum, 94%; copper, 4%; silicon, 2%. The use of lautal as a construction material is discussed in relation to specific weight, production methods, and riveting tests.
Contributing Partner: UNT Libraries Government Documents Department
Mechanical control of airplanes

Mechanical control of airplanes

Date: March 1, 1929
Creator: Boykow, H
Description: Before undertaking a detailed description of an automatic-control mechanism, I will state briefly the fundamental conditions for such devices. These are: 1) it must be sensitive at one or more reference values; 2) it must stop the angular motions of the airplane not produced by the pilot; and 3) it must be possible to switch it off and on by a simple hand lever.
Contributing Partner: UNT Libraries Government Documents Department
Fire prevention on airplanes. Part I

Fire prevention on airplanes. Part I

Date: October 1, 1929
Creator: Sabatier, J
Description: Various methods for preventing fires in airplanes are presented with most efforts centering around prevention of backfires, new engine and carburetor designs, as well as investigations on different types of fuels.
Contributing Partner: UNT Libraries Government Documents Department
Remarks on building of low-powered airplanes

Remarks on building of low-powered airplanes

Date: January 1, 1924
Creator: Langsdorff, Werner V
Description: If the low-powered airplane is to be used advantageously by private individuals, the most important consideration is a smaller fuel consumption and, hence, a lower engine power. From experiments with gliders, it appears entirely possible, by utilizing ascending winds (on the weather side of mountains and those generated by the heat of the sun) and by employing engine flight intermittently, as required to fly long distances over land.
Contributing Partner: UNT Libraries Government Documents Department
Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part II

Experimental investigation of the physical properties of medium and heavy oils, their vaporization and use in explosion engines. Part II

Date: May 1, 1926
Creator: Heinlein, Fritz
Description: This report is an evaluation of the experiments on the use of heavy oils in explosion engines. A method for determining the heat of vaporization of these heavy oils is presented.
Contributing Partner: UNT Libraries Government Documents Department
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