Technical Report Archive & Image Library (TRAIL) - 143 Matching Results

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On the Definition of the Standard Atmosphere

Description: "On April 15, 1920, the under Secretary of State for Aeronautics and Aerial Transport decided to adopt as Standard Atmosphere for official airplane tests in France, the atmosphere defined by the following law, known as the Law of the S.T.You.(Technical Section of Aeronautics): From 0 to 11,000 m. - 0=15-0.0065 Z and above 11,000 m. - 0= -56.5 degrees being the temperature in centigrade degrees at altitude Z expressed in meters. For altitude 0 the pressure is 760 mm of mercury. In the magazine "… more
Date: April 1921
Creator: Grimault, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tin Soldering of Aluminum and Its Alloys

Description: A method is presented for soldering aluminum to other metals. The method adopted consists of a galvanic application to the surface of the light-metal parts to be soldered, of a layer of another metal, which, without reacting electrolytically on the aluminum, adheres strongly to the surface to which it is applied, and is, on the other hand, adapted to receive the soft solder. The metal found to meet the criteria best was iron.
Date: October 1921
Creator: Gallo, Gino
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fire Tests of Building Columns

Description: Technical paper issued by the Bureau of Mines over studies conducted on fire resistance on building columns. As stated in the introduction, "the purpose of this investigation is to ascertain (1) the ultimate resistance against fire, of protected and unprotected columns as used in the interior of buildings; (2) their resistance against impact and sudden cooling from hose streams when in a highly heated condition" (p. 12). This paper includes tables, illustrations.
Date: April 21, 1921
Creator: Ingberg, S. H.; Griffin, H. K.; Robinson, W. C. & Wilson, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Gas Masks for Gases Met in Fighting Fires

Description: Technical paper issued by the Bureau of Mines over the development of gas masks designed for fighting fires. The characteristics of the different types of masks in development are presented. This paper includes tables, illustrations, and photographs.
Date: August 1921
Creator: Fieldner, Arno Carl; Katz, Sidney H. & Kinney, Selwyne P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Petroleum Laws of All America

Description: Report issued by the Bureau of Mines covering petroleum laws of the U.S. and surrounding oil producing countries. As stated in the preface, "this bulletin includes the petroleum laws of (1) United States; (2) the several oil-producing States; (3) Canada; (4) Mexico; (5) the Republics of Central and South America" (p. iv).
Date: March 1921
Creator: Thompson, Joseph Wesley
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Destructive Distillation of Mixtures of Oil and Coal

Description: Report issued by the U.S. Bureau of Mines on the characteristics and behavior of oil and coal distillation processes. The effectiveness of the distillation processes and the properties of the oil and coal mixtures are presented. This report includes tables, graphs, and illustrations.
Date: December 1921
Creator: Davis, Joseph D.; Place, Palmer B. & Scott, G. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Treatment of the Tungsten Ores of Boulder County, Colo.

Description: Report discussing the the development of milling practice in Boulder County, the ore-dressing methods in use, and the local manufacture of ferrotungsten and tungstic oxide. Figures giving the production of tungsten concentrates in the Boulder district, in the United States, and in the world; data on the buying of tungsten ores; costs of production; and the normal tungsten requirements in this country are presented.
Date: October 1921
Creator: Bonardi, J. P. & Williams, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Resistance of Spheres and Ellipsoids in Wind Tunnels

Description: Note presenting a study of the influence exercised on the results of measurements by the dimensions and type of the tunnels used in aerodynamic laboratories, and on the comparison of the results with observations made in motionless and unlimited air.
Date: January 1921
Creator: Riabouchinsky, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The pressure distribution over the horizontal tail surfaces of an airplane 2

Description: From Summary: "This investigation was undertaken to determine whether the results obtained upon model tail surfaces can be used to accurately predict loads upon the full-sized tail; and also to find the distribution of load when large elevator angles are used, as the loads from such angles can not be obtained readily in free flight. The method consisted in using a metal horizontal tail surface inside of which small air passages, connecting with a series of holes in the surface, led the pressure… more
Date: 1921
Creator: Norton, F. H. & Bacon, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary experiments to determine scale and slip-stream effects on a 1/24th size model of a JN4H biplane

Description: This work was undertaken to obtain results on a small model of a complete airplane which might be used for comparison with corresponding tests made in full flight. Somewhat similar tests have been previously made at various other laboratories; but as certain discrepancies exist between corresponding tests in different tunnels, it has been deemed advisable to obtain a direct comparison for this particular installation. The present work covers tests on a one-twenty-fourth scale model at speeds va… more
Date: 1921
Creator: Bacon, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Diagrams of Airplane Stability

Description: In this report a study is made of the effect on longitudinal and lateral oscillations of an airplane of simultaneous variations in two resistance derivatives while the remainder of the derivatives are constant. The results are represented by diagrams in which the two variable resistance derivatives are used as coordinates, and curves are plotted along which the modulus of decay of a long oscillation has a constant value. The same type of analysis is also carried out for the stability of the par… more
Date: 1921
Creator: Bateman, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Statical Longitudinal Stability of Airplanes

Description: This report, which is a continuation of the "Preliminary report on free flight testing" (report no. NACA-TR-70), presents a detailed theoretical analysis of statical stability with free and locked controls and also the results of many free flight test on several types of airplanes. In developing the theory of stability with locked controls an expression for pitching moment is derived in simple terms by considering the total moment as the sum of the moments due to wings and tail surface. This ex… more
Date: 1921
Creator: Warner, Edward P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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General Theory of the Steady Motion of an Airplane

Description: The writer points out briefly the history of the method proposed for the study of steady motion of an airplane, which is different from other methods now used. M. Paul Painleve has shown how convenient the drag-lift curve was for the study of airplane steady motion. The author later added to the drift-lift curve the curve called the "speed curve" which permits a direct checking of the speed of the airplane under all flying conditions. But the speed curve was plotted in the same quadrant as the … more
Date: 1921
Creator: de Bothezat, George
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design of Wind Tunnels and Wind Tunnel Propellers 2

Description: This report is a continuation of National Advisory Committee for Aeronautics report no. 73. The variations in velocity and direction of the wind stream were studied by means of a recording air speed meter and a recording yawmeter. The work was carried on both in a 1-foot diameter model tunnel and in a 5-foot full-size tunnel, and wherever possible comparison was made between them. It was found that placing radial vanes directly before the propeller in the exit cone increased the efficiency of t… more
Date: 1921
Creator: Norton, F. H. & Warner, Edward P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerations in flight

Description: This report deals with the accelerations obtained in flight on various airplanes at Langley Field for the purpose of obtaining the magnitude of the load factors in flight and to procure information on the behavior of an airplane in various maneuvers. The instrument used in these tests was a recording accelerometer of a new type designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists of a flat steel spring supported rigidly at one end so that t… more
Date: 1921
Creator: Norton, F. H. & Allen, E. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerometer design

Description: In connection with the development of an accelerometer for measuring the loads on airplanes in free flight a study of the theory of such instruments has been made, and the results of this study are summarized in this report. A portion of the analysis deals particularly with the sources of error and with the limitations placed on the location of the instrument in the airplane. The discussion of the dynamics of the accelerometer includes a study of its theoretical motions and of the way in which … more
Date: 1921%
Creator: Norton, F. H. & Warner, Edward P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Calculated Performance of Airplanes Equipped With Supercharging Engines

Description: In part one of this report are presented the theoretical performance curves of an airplane engine equipped with a supercharging compressor. In predicting the gross power of a supercharging engine, the writer uses temperature and pressure correction factors based on experiments made at the Bureau of Standards (NACA report nos. 45 and 46).. Part two of this report presents an estimation of the performance curves of an airplane fitted with a supercharging engine.
Date: 1921
Creator: Kemble, E. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Performance of a Liberty 12 airplane engine

Description: In cooperation with the Engineering Division of the Air Service of the United States Army, a Liberty-12 engine has been tested at the Bureau of Standards. The program of tests was planned to yield that information considered most important in determining the value of the engine for aviation. Full power runs were made at the ground, at 25,000 feet, and at several intermediate altitudes. To determine the mechanical efficiency of the engine, friction horsepower was measured at the ground and at 15… more
Date: 1921
Creator: Sparrow, S. W. & White, H. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Torsion of wing trusses at diving speeds

Description: The purpose of this report is to indicate what effect the distortion of a typical loaded wing truss will have upon the load distribution. The case of high angle of incidence may be dismissed immediately from consideration as the loads on the front and rear trusses are balanced, and consequently there will be little angular distortion. A given angular distortion will have the maximum effect upon load distribution in the region of the angle of no-lift, because the slope of the lift curve is highe… more
Date: 1921
Creator: Miller, Roy G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Angles of Attack and Air Speeds During Maneuvers

Description: From Introduction: "The following report was prepared at the Langley Memorial Aeronautical Laboratory of the National Advisory Committee for Aeronautics, as it seemed desirable that there should be some study of the attitude assumed by an airplane, and more particularly of its motion with respect to surrounding air when maneuvering, either in ordinary turns, spirals, climbs, and dives, or in those more spectacular feats commonly known as stunts. It is important to secure this information, among… more
Date: 1921~
Creator: Warner, E. P. & Norton, F. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A high-speed engine pressure indicator of the balanced diaphragm type

Description: This report describes a pressure-measuring device especially adapted for use in mapping indicator diagrams of high-speed internal combustion engines. The cards are obtained by a point-to-point method giving the average of a large number of engine cycles. The principle involved is the balancing of the engine cylinder pressure against a measured pressure on the opposite side of the metal a diaphragm of negligible stiffness.
Date: 1921
Creator: Dickinson, H. C. & Newell, F. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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