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Contribution to the Systematic Investigation on Joukowsky Profiles

Description: "This article resulted from the need of showing, in a simple way, how the aerodynamic properties of airfoils are affected by the shape of their profiles. No general solution of this problem could be found, since the profile shapes cannot ordinarily be expressed by simple mathematical formulas. This advantage is possessed only by the Joukowsky profiles and this discussion of the problem is therefore limited to them" (p. 1).
Date: April 1928
Creator: Loew, Gottfried
Partner: UNT Libraries Government Documents Department
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Steel Spars

Description: A history of English metal spar construction is presented in this paper. The way in which different spar designs or spar materials influence the aircraft wing loading and aerodynamics is described.
Date: April 1928
Creator: Martin, Brian L.
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin III: Effect of the Previous Treatment of Sheet Material on the Susceptibility to This Type of Corrosion

Description: As a result of testing, it was determined that control of the rate of quenching and the avoidance of accelerated aging by heating are the only means of modifying duralumin itself so as to minimize the intercrystalline form of corrosive attack. It is so simple a means that it should be adopted even though it may not completely prevent, but only reduce, this form of corrosive attack. By so doing, the need for protection of the surface is less urgent.
Date: April 1928
Creator: Rawdon, Henry S.
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin IV: The Use of Protective Coatings

Description: Although the corrosion resistance of sheet duralumin can be greatly improved by suitable heat treatment, protection of the surface is still necessary if long life under varied service conditions is to be insured. The coatings used for this purpose may be grouped into three classes: the varnish type of coating, the oxide type produced by a chemical treatment of the surface, and metallic coatings, of which aluminum appears to be the most promising. Since the necessary weather exposure tests are n… more
Date: April 1928
Creator: Rawdon, Henry S.
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin I: Practical Aspects of the Problem

Description: Since aircraft design is tending toward all-metal construction, the strong heat-treatable light aluminum alloy, duralumin (a generic name for a class of heat-treatable alloys containing Cu, Mg, Mn, and Si), is finding increasing application. Doubt has been expressed concerning the reliability and permanence of these materials. Information is given on the effect of corrosion on the tensile properties of 14-gauge sheet duralumin, heat treated by quenching in hot water after being heated for 15 mi… more
Date: April 1928
Creator: Rawdon, Henry S.
Partner: UNT Libraries Government Documents Department
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Corrosion Embrittlement of Duralumin II: Accelerated Corrosion Tests and the Behavior of High-Strength Aluminum Alloys of Different Compositions

Description: The permanence, with respect to corrosion, of light aluminum alloy sheets of the duralumin type, that is, heat-treatable alloys containing Cu, Mg, Mn, and Si is discussed. Alloys of this type are subject to surface corrosion and corrosion of the interior by intercrystalline paths. Results are given of accelerated corrosion tests, tensile tests, the effect on corrosion of various alloying elements and heat treatments, electrical resistance measurements, and X-ray examinations.
Date: April 1928
Creator: Rawdon, Henry S.
Partner: UNT Libraries Government Documents Department
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Variable Pitch Propellers

Description: It is proposed in this report to explain the Gloster Hele-Shaw Beacham variable pitch propeller. It is a variable pitch propeller, which has been theorized to greatly improve the performance of an airplane or airship. An explanation of the way the propeller works and some of the physics behind propeller operation are provided.
Date: April 1928
Creator: Milner, H. L.
Partner: UNT Libraries Government Documents Department
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Take-Off of Heavily Loaded Airplanes

Description: In the present article, several suggestions will be made for shortening the otherwise long take-off distance. For the numerical verification of the process, I will use a graphic method for determining the take-off distance of seaplanes.
Date: April 1928
Creator: Pröll, A.
Partner: UNT Libraries Government Documents Department
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The Avro "Avian III" Airplane (British)

Description: The Avro Avian has a lift capacity of 828 lbs (including pilot). It is equipped with the Mark II A.D.C. Cirrus engine. Details regarding the fuselage, cockpits, controls, landing gear, wings, engines, characteristics, drawings, and photographs are provided.
Date: April 1928
Partner: UNT Libraries Government Documents Department
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Aerodynamic Characteristics of Airfoils 5: Continuation of Reports Nos. 93, 124, 182, and 244

Description: "This collection of data on airfoils has been made from published reports of a number of the leading aerodynamic laboratories of this country and Europe. The information which was originally expressed according to the different customs of the several laboratories is here presented in a uniform series of charts and tables suitable for the use of designing engineers and for purposes of general reference. The authority for the results here presented is given as the name of the laboratory at which … more
Date: April 1928
Partner: UNT Libraries Government Documents Department
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Pressure Distribution Tests on PW-9 Wing Models From -18 Degree Through 90 Degree Angle of Attack

Description: "At the request of the Army Air Corps, an investigation of the pressure distribution over PW-9 wing models was conducted in the atmospheric wind tunnel of the National Advisory Committee for Aeronautics. The primary purpose of these tests was to obtain wind-tunnel data on the load distribution on the cellule to be correlated with similar information obtained in flight tests, both to be used for design purposes. Because of the importance of the conditions beyond the stall as affecting the contro… more
Date: April 9, 1928
Creator: Loeser, Oscar E., Jr.
Partner: UNT Libraries Government Documents Department
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The Gaseous Explosive Reaction: A Study of the Kinetics of Composite Fuels

Description: "This report deals with the results of a series of studies of the kinetics of gaseous explosive reactions where the fuel under observation, instead of being a simple gas, is a known mixture of simple gases. In the practical application of the gaseous explosive reaction as a source of power in the gas engine, the fuels employed are composite, with characteristics that are apt to be due to the characteristics of their components and hence may be somewhat complex" (p. 503).
Date: April 25, 1928
Creator: Stevens, F. W.
Partner: UNT Libraries Government Documents Department
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