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The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number

Description: This report contains the aerodynamic properties of the wing sections U.S.A. 5, U.S.A. 27, U.S.A. 35 A, U.S.A. 35 B, Clark Y, R.A.F. 15, and Gottingen 387, as determined at various Reynolds numbers up to an approximately full scale value in the variable density wind tunnel of the National Advisory Committee for Aeronautics. It is shown that the characteristics of the wings investigated are affected greatly and in a somewhat erratic manner by variation of the Reynolds number. In general there is … more
Date: 1927~
Creator: Munk, Max M. & Miller, Elton W.
Partner: UNT Libraries Government Documents Department
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Annual Report for the National Advisory Committee for Aeronautics (12th). Administrative Report Including Technical Reports Nos. 233 to 256

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, bibliographies, and financial report.
Date: 1927
Partner: UNT Libraries Government Documents Department
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Approximations for Column Effect in Airplane Wing Spars

Description: "The significance attaching to "column effect" in airplane wing spars has been increasingly realized with the passage of time, but exact computations of the corrections to bending moment curves resulting from the existence of end loads are frequently omitted because of the additional labor involved in an analysis by rigorously correct methods. The present report represents an attempt to provide for approximate column effect corrections that can be graphically or otherwise expressed so as to be … more
Date: 1927
Creator: Warner, Edward P. & Short, Mac
Partner: UNT Libraries Government Documents Department
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Characteristics of a twin-float seaplane during take-off

Description: This report presents the results of an investigation of the planing and get-away characteristics of three representative types of seaplanes, namely, single float, boat, and twin float. The experiments carried out on the single float and boat types have been reported on previously. This report covers the investigation conducted on the twin-float seaplane, the DT-2, and includes as an appendix, a brief summary of the results obtained on all three tests. At low-water speeds, 20 to 30 miles per hou… more
Date: January 1927
Creator: Crowley, John W., Jr. & Ronan, K. M.
Partner: UNT Libraries Government Documents Department
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A Comparison of the Take-Off and Landing Characteristics of a Number of Service Airplane

Description: "This investigation, which is a continuation of Technical Report 154, follows very closely the earlier methods and covers a number of service airplanes, whereas the previous report covered but one, the JN-4H. In addition to the air speed, acceleration, and control positions as given in report no. 154, information is here given regarding the distance run and the ground speed for the various airplanes during the two maneuvers" (p. 457).
Date: 1927
Creator: Carroll, Thomas
Partner: UNT Libraries Government Documents Department
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The Corrosion of Magnesium and of the Magnesium Aluminum Alloys Containing Manganese

Description: "The extensive use of magnesium and its alloys in aircraft has been seriously handicapped by the uncertainties surrounding their resistance to corrosion. This problem has been given intense study by the American Magnesium Corporation and at the request of the Subcommittee on Materials for Aircraft of the National Advisory Committee for Aeronautics this report was prepared on the corrosion of magnesium" (p. 419).
Date: 1927
Creator: Boyer, J. A.
Partner: UNT Libraries Government Documents Department
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Description of the NACA Universal Test Engine and Some Test Results

Description: "This report describes the 5-inch bore by 7-inch stroke single cylinder test engine used at the Langley Field Laboratory of the National Advisory Committee for Aeronautics in laboratory research on internal-combustion engine problems and presents some results of tests made therewith. The engine is arranged for variation over wide ranges, of the compression ratio and lift and timing of both inlet and exhaust valves while the engine is in operation. Provision is also made for the connection of a … more
Date: 1927
Creator: Ware, Marsden
Partner: UNT Libraries Government Documents Department
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The Direct Measurement of Engine Power on an Airplane in Flight With a Hub Type Dynamometer

Description: "This report describes tests made to obtain direct measurements of engine power in flight. Tests were made with a Bendemann hub dynamometer installed on a modified DH-4 Airplane, Liberty 12 Engine, to determine the suitability of this apparatus. This dynamometer unit, which was designed specially for use with a liberty 12 engine, is a special propeller hub in which is incorporated a system of pistons and cylinders interposed between the propeller and the engine crankshaft. The torque and thrust… more
Date: 1927
Creator: Gove, W. D. & Green, M. W.
Partner: UNT Libraries Government Documents Department
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Distribution of Pressure Over Model of the Upper Wing and Aileron of a Fokker D-VII Airplane

Description: "This report describes tests made for the purpose of determining the distribution of pressure over a model of the tapered portion of the upper wing and the aileron of a Fokker D-VII Airplane. Normal pressures were measured simultaneously at 74 points distributed over the wing and aileron. Tests were made throughout the useful range of angles of attack with aileron setting ranging from -20 degrees to +20 degrees. The results are presented graphically" (p. 541).
Date: 1927
Creator: Fairbanks, A. J.
Partner: UNT Libraries Government Documents Department
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Dyle and Bacalan Metal Monoplane, D.B. 10: Night Bomber - Equipped with Two 420 HP. Jupiter Engines

Description: The D.B. 10 is manufactured of duraluminum and special high resistance steel. It can be used as a passenger aircraft or as a bomber. Details of the design, wings, fuselage, empennage, engines, landing gear, characteristics, performances, drawings, and photographs are provided.
Date: January 1927
Creator: Serryer, J.
Partner: UNT Libraries Government Documents Department
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The effect of flight path inclination on airplane velocity

Description: This report was prepared at the request of the National Advisory Committee for Aeronautics in order to supply a systematic study of the relations between the flight velocity V and its horizontal component V subscript H, in power glides. Curves of V and V subscript H plotted against the inclination of the flight path 0 are given, together with curves which show the maximum values of V subscript H and the corresponding values of 0. Curves are also given showing the effect of small departures from… more
Date: January 1927
Creator: Diehl, Walter S.
Partner: UNT Libraries Government Documents Department
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Electrical characteristics of spark generators for automotive ignition

Description: From Summary: "This paper reports the results of an extensive program of measurements on 11 ignition systems differing widely in type. The results serve primarily to give representative data on the electric and magnetic constants of such systems, and on the secondary voltage produced by them under various conditions of speed, timing, shunting resistance, etc. They also serve to confirm certain of the theoretical formulas which have been proposed to connect the performance of such systems with t… more
Date: 1927
Creator: Brode, R. B.; Randolph, D. W. & Silsbee, F. B.
Partner: UNT Libraries Government Documents Department
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Flow and Drag Formulas for Simple Quadrics

Description: This report gives the pressure distribution and resistance found by theory and experiment for simple quadrics fixed in an infinite uniform stream of practically incompressible fluid. The experimental values pertain to air and some liquids, especially water; the theoretical refer sometimes to perfect, again to viscid fluids. For the cases treated the concordance of theory and measurement is so close as to make a resume of results desirable. Incidentally formulas for the velocity at all points of… more
Date: 1927
Creator: Zahm, A. F.
Partner: UNT Libraries Government Documents Department
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Interaction between air propellers and airplane structures

Description: From Summary: "The purpose of this investigation was the determination of the character and amount of interaction between air propellers as usually mounted on airplanes and the adjacent parts of the airplane structure - or, more specifically, those parts of the airplane structure within the wash of the propeller, and capable of producing any significant effect on propeller performance. In report no. 177 such interaction between air propellers and certain simple geometrical forms was made the su… more
Date: 1927
Creator: Durand, W. F.
Partner: UNT Libraries Government Documents Department
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Meteorological Conditions Along Airways

Description: This report is an attempt to show the kind of meteorological information that is needed, and is in part available, for the purpose of determining operating conditions along airways. In general, the same factors affect these operating conditions along all airways though in varying degree, depending upon their topographic, geographic, and other characteristics; but in order to bring out as clearly as possible the nature of the data available, a specific example is taken, that of the Chicago-Dalla… more
Date: 1927
Creator: Gregg, W. R.
Partner: UNT Libraries Government Documents Department
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Method of correcting wind tunnel data for omitted parts of airplane models

Description: Wind tunnel models do not have complete similarity to the full scale airplane. Part of the dissimilarity is due to the difference between the stationary model in the artificial wind stream of the tunnel and the moving airplane in still air. There are a number of other reasons for departing from exact geometrical similitude. For reasons of accuracy and economy, all minor parts of the full scale airplane, such as struts, wires, fittings, control horns and other parts whose scale corrections are l… more
Date: January 1927
Creator: Smith, R. H.
Partner: UNT Libraries Government Documents Department
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Nomenclature for Aeronautics

Description: "This nomenclature for aeronautics was prepared by a Special Conference on Aeronautical Nomenclature by the executive committee of the National Advisory Committee for Aeronautics at a meeting held on August 19, 1924, at which meeting Dr. Joseph S. Ames was appointed chairman of the conference. The conference was composed of representatives of the National Advisory Committee for Aeronautics and specially appointed representatives officially designated by the Army Air Service, the Bureau of Aeron… more
Date: 1927
Partner: UNT Libraries Government Documents Department
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Power Output and Air Requirements of a Two-Stroke Cycle Engine for Aeronautical Use

Description: This investigation was undertaken to determine the pressure and amount of air necessary for satisfactory high-speed, two-stroke cycle operation and thus permit the power requirements of the air pump or blower to be determined. Based on power output and air requirement here obtained the two-stroke cycle engine would seem to be favorable for aeronautical use. No attempts were made to secure satisfactory operation at idling speeds.
Date: 1927
Creator: Paton, C. R. & Kemper, Carlton
Partner: UNT Libraries Government Documents Department
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Precision of Wing Sections and Consequent Aerodynamic Effects

Description: Note presenting an investigation to determine the precision of wing sections of wood fabric construction used on a number of airplanes. All of the wing sections were found to deviate more or less from their respective prototypes. The aerodynamic effects resulting from consideration of thickness variation are then estimated from existing empirical information.
Date: January 1927
Creator: Rizzo, Frank
Partner: UNT Libraries Government Documents Department
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A preliminary study of fuel injection and compression ignition as applied to an aircraft engine cylinder

Description: "This report summarizes some results obtained with a single cylinder test engine at the Langley Field Laboratory during a preliminary investigation of the problem of applying fuel injection and compression ignition to aircraft engines. For this work a standard Liberty Engine cylinder was fitted with a high compression, 11.4 : 1 compression ratio, piston, and equipped with an airless injection system, including a primary fuel pump, an injection pump, and an automatic injection valve. The results… more
Date: 1927
Creator: Gardiner, Arthur W.
Partner: UNT Libraries Government Documents Department
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