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Cooperative Investigation of Relationship Between Static and Fatigue Properties of Wrought N-155 Alloy at Elevated Temperatures

Description: Note presenting extensive data relating properties of wrought N-155 alloy under static, combined static and dynamic, and completed reversed dynamic stress conditions. Time periods for fracture ranged from 50 to 500 hours at room temperatrue, 1000, 1200, 1350, and 1500 degrees Fahrenheit. Results regarding the rupture and fatigue strengths, fatigue strengths based on cycles to failure, influence of superimposed fatigue loads on creep, influence on superimposed fatigue stress on elongation in the… more
Date: April 1955
Creator: NACA Subcommittee on Heat-Resisting Materials
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Theory of the Jet Syphon

Description: Note presenting a new approach to the theory of the mixing of two currents in an injector which deals with an incompressible ideal fluid. The theory shows new potentialities in an appropriate shaping of the form of the walls of the mixing zone so as to improve the jet-syphon efficiency beyond the heretofore theoretically predicted. A few examples of ways to improve jet-syphon efficiency are indicated.
Date: May 1955
Creator: Szczeniowski, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure Waves Generated by Addition of Heat in a Gaseous Medium

Description: Note presenting the approximate formula of a linearized solution for the pressure field generated by a moderate rate of heat release. The analogies between the pressure waves generated by heat release and those generated by (1) mass release, (2) piston motion, or (3) a two-dimensional body in a supersonic stream are established analytically.
Date: June 1955
Creator: Chu, Boa-Teh
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Grain-Boundary Behavior in Creep of Aluminum Bicrystals

Description: Note presenting a study of the gliding of one metal crystal with respect to another parallel to their mutual grain boundary in pure aluminum bicrystals during isothermal creep at a range of temperatures and static stresses. Results regarding induction period, cyclic motion, influence of time on rate of grain-boundary displacement, influence of temperature on rate of grain-boundary displacement, influence of stress on rate of grain-boundary displacement, influence of relative crystal orientation… more
Date: December 1955
Creator: Rhines, F. N.; Bond, W. E. & Kissel, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Acoustic radiation from two-dimensional rectangular cutouts in aerodynamic surfaces

Description: From Introduction: "The experiments in high-speed flow showed that an intense, high-frequency acoustic radiation is an essential feature of the problem. Consequently, a study of the acoustic field (involving schlieren observations and frequency and intensity measurements) was undertaken. This report presents the salient features of the study, which was mainly exploratory."
Date: August 1955
Creator: Krishnamurty, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Universal Column Formula for Load at Which Yielding Starts

Description: "An analysis is presented of the load at which yielding first occurs in actual columns, taking adequately into account all the factors which have an important effect upon this load. These factors include initial defects and the yielding limit of materials. Extensive tests were made to verify the assumed relation between the magnitudes of the defects and the known properties of columns. The results are expressed as a formula or chart applicable to all situations" (p. 1).
Date: October 1955
Creator: Donnell, L. H. & Tsien, V. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of non-afterburning turbojets to supersonic flight

Description: Report presenting a paper to consider the feasibility of attaining, through the use of non-afterburning engines, essentially the same range with an all-supersonic mission as the range currently obtained with a mission incorporating subsonic cruise and supersonic dash.
Date: November 18, 1955
Creator: Cesaro, Richard S. & Walker, Curtis L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Meteorological Problems Associated With Commercial Turbojet-Aircraft Operation

Description: Memorandum presenting an analysis and evaluation of the meteorological requirements and problems anticipated with the operation of commercial turbojet aircraft. Discussions concerning problems of temperature, wind, pressure, ceiling, visibility, cloud and clear-air turbulence, icing, and communication are included in this study.
Date: June 21, 1955
Creator: Working Group of the NACA Subcommittee on Meteorological Problems
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some Results of Flight Testing of Ski-Equipped Aircraft at the Naval Air Test Center

Description: Memorandum presenting the results of flight testing of four different ski-equipped airplanes. Two types of skis were tested: hydro-skis designed to operate under or on the water surface and general-purpose skis designed to operate on a variety of surfaces but not underwater. A breakdown of the ski performance for each plane and ski combination is provided.
Date: February 4, 1955
Creator: Beck, Preston E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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From Linear Mechanics to Nonlinear Mechanics

Description: Consideration is given to the techniques used in telecommunication where a nonlinear system (the modulator) results in a linear transposition of a signal. It is then shown that a similar method permits linearization of electromechanical devices or nonlinear mechanical devices. A sweep function plays the same role as the carrier wave in radio-electricity. The linearizations of certain nonlinear functionals are presented.
Date: October 1955
Creator: Loeb, Julien
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reduction of the Shimmy Tendency of Tail and Nose-Wheel Landing Gears by Installation of Specially Designed Tires

Description: Shimmy of tail and nose wheels may be eliminated by installation of dampers and use of large trail; however, this produces construction and operational disadvantages. It is more favorable to employ, instead of the customary tail-wheel tires, tires with lesser shimmy tendency. A description of the best possible form for these tires follows: furthermore, a few general concepts regarding the effects of the condition of the tire, of the type of rolling motion, and of the landing, are discussed.
Date: July 1955
Creator: Schrode, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Mechanism of Buckling of a Circular Cylindrical Shell Under Axial Compression

Description: The present paper deals with the buckling of a circular cylindrical shell under axial compression from the viewpoint of energy and the characteristics of deformation. It is shown first, both theoretically and experimentally, that the reason why the buckling of a cylindrical shell is quite different from that of a flat plate is attributable to the existence of a nearly developable surface far apart from the original cylindrical surface. Based upon this result, the experimental fact that the buck… more
Date: July 1955
Creator: Yoshimura, Yoshimaru
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optimum Flight Paths of Turbojet Aircraft

Description: "The climb of turbojet aircraft is analyzed and discussed including the accelerations. Three particular flight performances are examined: minimum time of climb, climb with minimum fuel consumption, and steepest climb. The theoretical results obtained from a previous study are put in a form that is suitable for application on the following simplifying assumptions: the Mach number is considered an independent variable instead of the velocity; the variations of the airplane mass due to fuel consum… more
Date: September 1955
Creator: Miele, Angelo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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General Solutions of Optimum Problems in Nonstationary Flight

Description: "A general method concerning optimum problems in nonstationary flight is developed and discussed. Best flight techniques are determined for the following conditions: climb with minimum time, climb with minimum fuel consumption, steepest climb, descending and gliding flight with maximum time or with maximum distance. Optimum distributions of speed with altitude are derived assuming constant airplane weight and neglecting curvatures and squares of path inclination in the projection of the equatio… more
Date: October 1955
Creator: Miele, Angelo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Theory of Reversible and Nonreversible Cracks in Solids

Description: The Griffith crack theory is reviewed and certain shortcomings of this theory are discussed. A new description for the shape of a crack is given which takes into account the atomic structure of material. Through consideration of the total energy of the system and the shape of the crack, expressions for crack behavior are derived which are considered to remedy the defects of the Griffith theory.
Date: April 1955
Creator: Frenkel, Y. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Metallography of Aluminum and Its Alloys: Use of Electrolytic Polishing

Description: Recent methods are described for electropolishing aluminum and aluminum alloys. Numerous references are included of electrolytic micrographic investigations carried out during the period 1948 to 1952. A detailed description of a commercial electrolytic polishing unit, suitable for micrographic examination of aluminum and its alloys, is included.
Date: November 1955
Creator: Jacquet, Pierre A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Steady Properly-Banked Turns of Turbojet-Propelled Airplanes

Description: "The problem of a jet-propelled airplane held in a steady turn is treated both in the very general case and also in the particular case when the polar curve can be approximated by a parabola. Once the general solution has been obtained, some typical maneuvers are next studied such as, the turn of maximum bank, of maximum angular velocity, and of minimum radius of curvature. After a brief comparison is made between the turning characteristics of conventional airplanes and jet airplanes, and afte… more
Date: March 1955
Creator: Miele, Angelo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Method of Quadrature for Calculation of the Laminar and Turbulent Boundary Layer in Case of Plane and Rotationally Symmetrical Flow

Description: "For calculation of the characteristic parameters of the boundary layer (momentum-loss thickness and form parameter for the velocity profile), two quadrature formulas are given which are valid for the laminar as well as for the turbulent state of flow. These formulas cover both the two-dimensional and the rotationally symmetrical case. The calculation of the momentum-loss thickness is carried out by a simple integration of the energy theorem" (p. 1).
Date: May 1955
Creator: Truckenbrodt, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Description and bibliography of NACA research on wing controls: January 1946 - February 1955

Description: Report presenting some accompanying tables and bibliography for experimental aerodynamic studies in the field of wing controls during the period between January 1946 and February 1955. The tables are grouped according to the following major classifications: trailing-edge flap controls, leading-edge flap controls, and spoiler controls.
Date: March 24, 1955
Creator: Brewer, Jack D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thirty-Ninth Annual Report of the National Advisory Committee for Aeronautics: Administrative Report Including Technical Reports Nos. 1111 to 1157

Description: Report presenting the technical reports of the National Advisory Committee for Aeronautics from 1953. The report is divided into the technical activities of NACA, the committee organization and membership, and the financial report. The technical reports are divided into a general overview of NACA, unitary wind tunnels, aerodynamic research, power plants for aircraft, aircraft construction, operating problems, and reserch publications.
Date: 1955
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NACA Conference on Aerodynamics of High-Speed Aircraft

Description: "This document contains unedited reproductions of the technical papers presented by staff members of the NACA Laboratories at the NACA Conference on Aerodynamics of High-Speed Aircraft held at the Langley Aeronautical Laboratory November 1,2, and 3, 1955. The primary purpose of this conference was to convey to contractors of the military services and others concerned with the design of aircraft these recent research results and to provide those attending an opportunity to discuss the results. T… more
Date: 1955-11-01/1955-11-03
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Turbojet Propulsion-System Research and the Resulting Effects on Airplane Performance

Description: "For a period of ten to fifteen years intensive research and development has been conducted on turbojet propulsion systems for aircraft. During this period much has been learned about the system both from the standpoint of current usage and of future development possibilities. It is the purpose of this report to discuss the current status of the turbojet engine as produced in the United States and to discuss the future possibilities for improvement in the engine and in the fuel. The engine and … more
Date: March 17, 1955
Creator: Rothrock, Addison M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift on a Bent, Flat Plate

Description: The lift on a bent, flat plate is calculated exactly by the use of conformal mapping. Results are presented in terms permitting direct determination of the angle of zero lift, the lift coefficient, and the lift-curve slope for any flap-chord ratio, flap-deflection angle, and angle of attack.
Date: February 1955
Creator: Keune, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theory of Dynamic Creep

Description: An analysis is given of the causes of the increase in the creep of a material under dynamic loads. A theory of dynamic creep is proposed based on the after-effect theory of Becker. Three circumstances that must be taken into account when theoretically treating dynamic creep are provided.
Date: September 1955
Creator: Predvoditelev, A. A. & Smirnov, B. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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