National Advisory Committee for Aeronautics (NACA) - 54 Matching Results

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Bending of Thin Plates With Compound Curvature

Description: Report presenting an analysis for the deformation of a doubly curved thin plate under edge loads or surface loads for small deflections. The method is particularly useful for a plate whose radius of curvature in one direction is large compared with its length and width dimensions.
Date: October 1952
Creator: Lew, H. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bonding of molybdenum disulfide to various materials to form a solid lubricating film 2: friction and endurance characteristics of films bonded by practical methods

Description: Report exploring the use of molybdenum disulfide as a solid-film lubricant, especially in applications where designs or higher temperatures preclude liquid lubricants, because of its good frictional and thermal properties. An investigation was conducted to determine practical methods of bonding MoS2 to materials to form solid-film lubricants and friction and endurance characteristics of films so formed.
Date: October 1952
Creator: Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparison of two- and three-dimensional potential-flow solutions in a rotating impeller passage

Description: Report presenting a solution for three-dimensional, incompressible, non-viscous, potential flow in a rotating impeller passage with zero through flow. The solution is obtained for a conventional impeller with straight blades but with the inducer vanes removed and the impeller blades extended upstream parallel to the axis of the impeller.
Date: October 1952
Creator: Ellis, Gaylord O. & Stanitz, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of Cyclic Loading on Mechanical Behavior of 24S-T4 and 75S-T6 Aluminum Alloys and SAE 4130 Steel

Description: "An investigation was conducted to determine the effects of cyclic loading on the mechanical behavior of 24S-T4 and 75S-T6 aluminum alloys and SAE 4130 steel. Specimens of the three materials were subjected to various numbers of prior fatigue cycles both below and above the fatigue limits. Special slow-bend tests were employed to show the effects of prior cycles of fatigue stressing on the transition temperature to brittle fracture for SAE 4130 steel and on the energy-absorption capacity of the… more
Date: October 1952
Creator: MacGregor, C. W. & Grossman, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of moderate biaxial stretch-forming on tensile and crazing properties of acrylic plastic glazing

Description: Report presenting the effects of approximately 50-percent biaxial stretch-forming on the tensile and crazing properties of polymethyl methacrylate. Results indicated that biaxially stretch-forming polymethyl methacrylate approximately 50 percent does not affect its tensile strength of secant modulus of elasticity in tension. Results regarding standard tensile tests, stress-solvent crazing tests, long-time tensile tests, discussion of mechanism of crazing, accelerated weathering tests, additiona… more
Date: October 1952
Creator: Axilrod, B. M.; Sherman, M. A.; Cohen, V. & Wolock, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An engineering method for estimating notch-size effect in fatigue tests on steel

Description: Neuber's proposed method of calculating a practical factor of stress concentration for parts containing notches of arbitrary size depends on the knowledge of a "new material constant" which can be established only indirectly. In this paper, the new constant has been evaluated for a large variety of steels from fatigue tests reported in the literature, attention being confined to stresses near the endurance limit. Reasonably satisfactory results were obtained with the assumption that the constan… more
Date: October 1952
Creator: Kuhn, Paul & Hardrath, Herbert F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An experimental investigation of the behavior of 24S-T4 aluminum alloy subjected to repeated stresses of constant and varying amplitudes

Description: Report presenting a description of a device for adapting rotating-beam fatigue testing machines for tests in which the amplitude of stress is continuously varied. Testing was conducted on 24S-T aluminum-alloy specimens subjected to stresses with amplitudes varying according to sinusoidal and exponential functions.
Date: October 1952
Creator: Hardrath, Herbert F. & Utley, Elmer C., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental study of the effects of finite surface disturbances and angle of attack on the laminar boundary layer of an NACA 64A010 airfoil with area suction

Description: From Summary: "A Langley low-turbulence wind-tunnel investigation of a porous NACA 64A010 airfoil section has been made to determine the effectiveness of area suction in maintaining full-chord laminar flow behind finite disturbances and at angles of attacks other than 0 degrees. Aero suction resulted in only a small increase in the size of a finite disturbance required to cause premature boundary-layer transition as compared with that for the airfoil without suction. Combined wake and suction d… more
Date: October 1952
Creator: Schwartzberg, Milton A. & Braslow, Albert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Study of the Effects of Finite Surface Disturbances and Angle of Attack on the Laminar Boundary Layer of an NACA 64A010 Airfoil With Area Suction

Description: Note presenting a low-turbulence wind-tunnel investigation of an NACA 64A010 airfoil section with continuous suction through its porous surfaces to determine its ability to maintain extensive laminar flow behind finite surface disturbances and at angles of attack other than 0 degrees. Generally, application of area suction permitted only a small increase in the size of a finite disturbance required to cause premature boundary-layer transition as compared with the nonsuction airfoil.
Date: October 1952
Creator: Schwartzberg, Milton A. & Braslow, Albert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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First Landing of Bell X-2 Research Airplane

Description: Report presenting testing regarding the Bell X-2 supersonic research airplane, which is equipped with a skid main landing gear and nose wheel, to determine the low-speed handling qualities and landing characteristics. Results regarding the landing approach pattern, time histories, and final resting position of the airplane at landing are provided.
Date: October 1, 1952
Creator: Day, Richard E. & Stillwell, Wendell H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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First Landing of Bell X-2 Research Airplane

Description: "The Bell X-2 supersonic research airplane is equipped with a skid main landing gear and a nose wheel. Pending completion of the rocket engine, glide flights are being performed to determine low-speed handling qualities of the airplane and the landing characteristics with the skid-type landing gear. The present paper presents data obtained during the approach and landing of the X-2 airplane on its first flight" (p. 1).
Date: October 1952
Creator: Day, Richard E. & Stillwell, Wendell H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Investigation at Transonic Speeds of the Aerodynamic Characteristics of an Air Inlet Installed in the Root of a 45 Degree Sweptback Wing

Description: Report presenting an investigation in the transonic blowdown tunnel from Mach numbers 0.80 to 1.41 to determine the increments in lift and drag due to installation of a triangular-shaped air inlet in the root of a 45 degree sweptback wing and to determine the internal flow characteristics of the inlet. Results regarding pressure measurements of the inlet model, force measurements of basic and inlet models, and effect of boundary-layer bypass scoop and fuselage nose configuration on characterist… more
Date: October 1, 1952
Creator: Howell, Robert R. & Keith, Arvid L., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation with an interferometer of the flow around a circular-arc airfoil at mach numbers between 0.6 and 0.9

Description: From Summary: "The flow around a 12-percent-thick circular-arc airfoil at zero incidence was observed with an interferometer for small increments of free-stream Mach number from 0.609 to 0.896 with laminar and turbulent boundary layers. Mach number contours in the flow field and Mach number and pressure distributions on the airfoil were obtained. Conditions were determined along and at the bases of the shock waves that interacted with the turbulent boundary layer on the airfoil."
Date: October 1952
Creator: Wood, George P. & Gooderum, Paul B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Landing-Gear Impact

Description: Report deals with the impact forces in landing gears. Both the landing impact and the taxiing impact have been considered, but drag forces have so far been excluded. The differential equations are developed and their numerical integration is shown, considering the nonlinear properties of the oleo shock strut. A way is shown for determining the dimensions of the metering pin from a given load-time diagram. A review of German literature on landing-gear impact is also presented.
Date: October 1952
Creator: Flügge, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurements of temperature variations in the atmosphere near the tropopause with reference to airspeed calibration by the temperature method

Description: Measurements of temperature variations in the atmosphere near the tropopause over land in the vicinity of Langley Field, Va., are presented. This investigation was made for the purpose of obtaining information on the accuracy of the temperature method(NACA TN 2046) of airspeed calibration over the range of Mach number from 0.6 to .08. The temperature surveys and the description of a specially designed thermometer are also presented.
Date: October 1952
Creator: Lina, Lindsay J. & Ricker, Harry H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the calculation of flow about objects traveling at high supersonic speeds

Description: A procedure for calculating three-dimensional steady and nonsteady supersonic flows with the method of characteristics is developed and discussed. An approximate method is deduced from the characteristics method and shown to be of practical value at high supersonic speeds.
Date: October 1952
Creator: Eggers, A. J., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the Design of Airfoils in Which the Transition of the Boundary Layer Is Delayed

Description: Memorandum examining the phenomenon of airfoil drag, which is related almost exclusively to skin friction at high speed flight conditions. The primary way to reduce drag is to delay the transition from laminar to turbulent flow in the boundary layer along the surface. A particular airflow design that may delay transition and therefore have fewer problems related to drag are provided.
Date: October 1952
Creator: Tani, Itiro
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Planing Characteristics of a Surface Having a Basic Angle of Dead Rise of 20 Degrees and Horizontal Chine Flare

Description: Note presenting a study of the hydrodynamic characteristics obtained for a planing surface with a basic angle of dead rise of 20 degrees at the keel and horizontal chine flare. The wetted lengths, resistances, center-of-pressure locations, and drafts were determined at a range of speed coefficients, with the majority of the data obtained at Froude numbers in excess of 7.0.
Date: October 1952
Creator: Kapryan, Walter J. & Weinstein, Irving
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Relation Between Roughness of Interface and Adherence of Porcelain Enamel to Steel

Description: "Porcelain-enamel ground coats were prepared and applied under conditions that gave various degrees of adherence between enamel and a low-carbon steel (enameling iron). The variations in adherence were produced by (a) varying the amount of cobalt-oxide addition in the frit, (b) varying the type of metallic-oxide addition in the frit, keeping the amount constant at 0.8 weight percent, (c) varying the surface treatment of the metal before application of the enamel, by pickling, sandblasting, and … more
Date: October 1, 1952
Creator: Richmond, J. C.; Moore, D. G.; Kirkpatrick, H. B. & Harrison, W. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Short-Bearing Approximation for Full Journal Bearings

Description: A short-bearing approximation of pressure distribution in the oil film is presented which is an extension of the pressure-distribution function of Michell and Cardullo and includes end-leakage effects. Equations giving applied load, attitude angle, location and magnitude of peak film pressure, friction, and required oil flow rate as functions of the eccentricity ratio are also given. The capacity number, a basic non dimensional quantity resulting from this analysis is the product of the Sommerf… more
Date: October 1952
Creator: Ocvirk, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simple graphical solution of heat transfer and evaporation from surface heated to prevent icing

Description: "Equations expressing the heat transfer and evaporation from wetted surfaces during ice prevention have been simplified and regrouped to permit solutions by simple graphical means. Working charts for quick and accurate anti-icing calculations are also included" (p. 1).
Date: October 1952
Creator: Gray, Vernon H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simple Graphical Solution of Heat Transfer and Evaporation From Surface Heated to Prevent Icing

Description: "Equations expressing the heat transfer and evaporation from wetted surfaces during ice prevention have been simplified and regrouped to permit solutions by simple graphical means. Working charts for quick and accurate anti-icing calculations are also included" (p. 1).
Date: October 1952
Creator: Gray, Vernon H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stability and Control Flight Tests of a 0.13-Scale Model of the Consolidated-Vultee XFY-1 Airplane in Take-Offs, Landings, and Hovering Flight: TED No. NACA DE 368

Description: Report presenting an investigation to determine the dynamic stability and control characteristics of a scale flying model of the Consolidated-Vultee XFY-1 vertically rising airplane. It includes the results of flight tests to determine the stability and control characteristics of the model in hovering, take-offs, and landings.
Date: October 1, 1952
Creator: Lovell, Powell M., Jr.; Smith, Charles C., Jr. & Kirby, Robert H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A study of the transient behavior of shock waves in transonic channels flows

Description: Report presenting an investigation of the accuracy of the result obtained in a fundamental paper by Kantrowitz that a small short-time lowering of the back pressure in steady, shock-free, transonic diffuser flow causes a stationary or trapped shock to form near the critical shock channel throat.
Date: October 1952
Creator: Hess, Robert V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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