National Advisory Committee for Aeronautics (NACA) - 294 Matching Results

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Abnormal grain growth in nickel-base heat-resistant alloys

Description: From Introduction: "The data included in this report for Nimonic 80A alloy, for instance, represent experiments carried out to help clarify a production problem of grain-size control in an alloy which has been extensively used. The general procedure of the investigation was to carry out controlled laboratory experiments on samples of bar stock to find conditions of heating and hot-working which resulted in abnormal grain growth."
Date: December 1957
Creator: Decker, R. F.; Rush, A. I.; Dano, A. G. & Freeman, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of horizontal-tail loads in pitching maneuvers on a flexible swept-wing jet bomber

Description: From Introduction: "The analysis of flight data in the present report is, to a large extent, based on analyses and information contained in references 1 and 2 for wing deflections, reference 3 for horizontal-tail parameters, reference 4 for airplane lift-curve slopes and angles of zero lift, and reference 5 for wing centers of pressure."
Date: December 1957
Creator: Aiken, William S., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Approximate Calculation of the Compressible Turbulent Boundary Layer With Heat Transfer and Arbitrary Pressure Gradient

Description: Note presenting an approximate method for the calculation of compressible turbulent boundary layer with heat transfer and arbitrary pressure gradient. The method involves the momentum integral and moment-of-momentum equations as simplified by using Stewartson's transformation.
Date: December 1957
Creator: Reshotko, Eli & Tucker, Maurice
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Creep Deformation Patterns of Joints Under Bearing and Tensile Loads

Description: Note presenting an investigation to study the interaction of bearing and tensile loads on the creep behavior of joints. A simplified model was employed which contained many of the features found in riveted connections. Results regarding creep-rupture tests, plate subjected to tension, plate subjected to bearing loads, plate subjected to tensile and bearing loads, and index of joint behavior are provided.
Date: December 1957
Creator: Bodine, E. G.; Carlson, R. L. & Manning, G. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of overheating on creep-rupture properties of HS-31 alloy at 1,500 degrees F

Description: Report presenting an investigation of overheating HS-31 alloy to four different temperatures during the course of rupture tests at 1500 degrees Fahrenheit. The intent was to develop basic information on the effect of overheats on creep-rupture properties so as to assist in the evaluation of damage from overheating during gas-turbine operation. Results regarding the rupture properties of test material, overheating in the absence of stress, overheating in the presence of stress, microstructural e… more
Date: December 1957
Creator: Rowe, John P. & Freeman, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of overheating on creep-rupture properties of S-816 alloy at 1,500 degrees F

Description: The effects of overheats to temperatures of 1650, 1800, 1900, and 2000 F were evaluated in terms of the changes in creep-rupture characteristics at 1500 F of S-816 alloy under stresses within the range of rupture strengths of the alloy for 100 to 1000 hours. Overheat periods were predominantly of 2-minute duration and were applied cyclically at approximately 5- or 12-hour intervals. The possible damage from overheating was believed to include internal metal structure changes induced by exposure… more
Date: December 1957
Creator: Rowe, John P. & Freeman, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of leading-edge blunting on the local heat transfer and pressure distributions over flat plates in supersonic flow

Description: Report presenting an investigation of the effect of leading-edge thickness on the flow over flat plates with square and cylindrical blunting at Mach number 4 and free-stream Reynolds numbers per inch of 2380 and 6600. For test conditions, the bow shock wave was detached and leading-edge shape had no effect on surface pressures aft of two leading-edge thicknesses. Results regarding surface pressure, flow-field surveys, heat transfer, boundary-layer thickness, surface pressure distribution, local… more
Date: December 1957
Creator: Creager, Marcus O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Droplet Impingement on Four Bodies of Revolution

Description: An experiment was conducted to obtain the rate and area of cloud droplet impingement on four bodies of revolution was conducted in the icing tunnel with a dye-tracer technique. The study included several forebody shapes of different fineness ratios over a range of angles of attack and rotational speeds. Results regarding velocity distribution, local impingement characteristics, and correlation of impingement characteristics are provided.
Date: December 1957
Creator: Lewis, James P. & Ruggeri, Robert S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat transfer and recovery temperatures on a sphere with laminar, transitional, and turbulent boundary layers at Mach numbers of 2.00 and 4.15

Description: Report presenting an investigation of the pressure and equilibrium-temperature distributions on a sphere at Mach numbers of 2.00 and 4.15. The local aerodynamic heat transfer was measured on a sphere at Mach number 2.00 and on a hemisphere-cylinder at Mach number 4.15. Results regarding pressure distributions, equilibrium and recovery temperatures, heat-transfer coefficients, and effect of roughness on transition are provided.
Date: December 1957
Creator: Beckwith, Ivan E. & Gallagher, James J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the effects of propeller diameter on the ability of a flapped wing, with and without boundary-layer control, to deflect a propeller slipstream downward for vertical take-off

Description: Report presenting an investigation to study the effects of propeller diameter on the ability of a flapped wing, with and without boundary-layer control, to deflect propeller slipstreams downward for vertical take-off. The results indicated that without boundary-layer control, an increase in the ratio of flap chord to propeller diameter increases the turning angle but decreases the ratio of resultant force to thrust.
Date: December 1957
Creator: Spreemann, Kenneth P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laminar Boundary Layer With Heat Transfer on a Cone at Angle of Attack in a Supersonic Stream

Description: Note presenting the equations of the compressible laminar boundary layer for the windward streamline in the plane of symmetry of a yawed cone. Solutions are obtained for both insulated and cooled surfaces. The heat-transfer rate to this most windward streamline increases significantly with angle of attack.
Date: December 1957
Creator: Reshotko, Eli
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A reexamination of the use of simple concepts for predicting the shape and location of detached shock waves

Description: A reexamination has been made of the use of simple concepts for predicting the shape and location of detached shock waves. The results show that simple concepts and modifications of existing methods can yield good predictions for many nose shapes and for a wide range of Mach numbers.
Date: December 1957
Creator: Love, Eugene S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Thermocouple Subcarrier Oscillator for Telemetering Temperatures From Pilotless Aircraft

Description: Note presenting a subcarrier oscillator which, in conjuncting with a telemetering system, gives a satisfactory method for telemetering temperatures by means of thermocouples from pilotless aircraft. The method results in an oscillator having a small size, low microphonics, high input resistance, and satisfactory stability if a switch is used to commutate calibration voltages along with the pickups.
Date: December 1957
Creator: Fricke, Clifford L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Three-Degree-of Freedom Evaluation of the Longitudinal Transfer Functions of a Supersonic Canard Missile Configuration Including Changes in Forward Speed

Description: Note presenting a reevaluation of existing flight data obtained for a supersonic canard missile configuration of the boost-glide type to determine derivatives not previously evaluated. The derivatives are utilized to determine some typical airframe frequency responses based on the three-degree-of-freedom longitudinal equations of motion. Results regarding derivatives, frequency responses, and three-degree-of-freedom approach to future automatic-control studies are provided.
Date: December 1957
Creator: Seaberg, Ernest C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transition-flight investigation of a four-engine-transport vertical-take-off airplane model utilizing a large flap and extensible vanes for redirecting the propeller slipstream

Description: Report presenting an experimental investigation to determine the dynamic stability and control characteristics of a four-engine-transport vertical-take-off airplane model in the transition range from hovering to normal forward flight. Both flight and static-force tests were conducted and flight testing was carried out with a pitch damper installed. Results regarding longitudinal stability and control and lateral stability and control are provided.
Date: December 1957
Creator: Tosti, Louis P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Turbulence measurements in multiple interfering air jets

Description: Report presenting turbulent and mean-flow characteristics of several noise-suppression multiple-jet nozzles from hot-wire-anemometer measurements for the flow conditions at Mach number 0.3. The measurements show that turbulent mixing, as indicated by reduced intensity and scale of turbulence, occurs closer to the nozzle in interfering than in noninterfering jets. Results regarding mean flow, turbulent flow, and scale or eddy size are provided.
Date: December 1957
Creator: Laurence, James C. & Benninghoff, Jean M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Velocity and friction characteristics of laminar viscous boundary-layer and channel flow over surfaces with ejection or suction

Description: Report presenting some information on flow characteristics - velocity field, pressure drop, and friction - for steady, fully developed laminar flow through a duct consisting of two parallel walls, for flow throguh tubes with circular cross section, and for boundary-layer flow over infinite wedges. In order to determine the extent to which the boundary conditions imposed o the flow by the various geometries influence the flow characteristics, dimensionless parameters common to both channel and b… more
Date: December 1957
Creator: Eckert, E. R. G.; Donoughe, Patrick L. & Moore, Betty Jo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical determination of the natural coupled frequencies and mode shapes and the response to oscillating forcing functions of tandem helicopters

Description: Report presenting a method for the analytical determination of the natural coupled frequencies and mode shapes of vibrations in the vertical plane of tandem helicopters. That information is then used to calculate the response of the helicopter to applied oscillation forces. Calculated response curves show how the vibrations of the cockpit vary with frequency and method of application of oscillating forces applied at the hubs.
Date: December 1956
Creator: Brooks, George W. & Houbolt, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Average Properties of Compressible Laminar Boundary Layer on Flat Plate With Unsteady Flight Velocity

Description: Note presenting a determination of the time-average characteristics of boundary layers over a flat plate in nearly quasi-steady flow. The time averages were found without specifying the plate velocity explicitly except that it is positive and has an average value. Some remarks on the heat-transfer problem are also provided.
Date: December 1956
Creator: Moore, Franklin K. & Ostrach, Simon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Determination of the Structural Damping Coefficients of Six Full-Scale Helicopter Rotor Blades of Different Materials and Methods of Construction

Description: Results of an experimental investigation of the structural damping of six full-scale helicopter rotor blades, made to determine the variation of structural damping with materials and methods of construction, are presented. The damping of the blades was determined for the first three flapwise bending modes, first chordwise bending mode, and first torsion mode. The contribution of structural damping to the total damping of the blades is discussed for several aerodynamic conditions in order to poi… more
Date: December 1956
Creator: Gibson, Frederick W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Distribution of normal component of induced velocity in lateral plane of a lifting rotor

Description: From Summary: "Values of nondimensional normal component of induced velocity in the lateral plane of a uniformly loaded lifting rotor are given in the form of graphs and tables. The values were computed by use of the Biot-Savart relation using the assumption that the wake vortex distribution consists of a uniform, semi-infinite elliptic cylinder. The necessary auxiliary equations are given so that the graphs or tables of the induced velocity ratios nay be used to estimate numerical values of th… more
Date: December 1956
Creator: Castles, Walter, Jr. & Durham, Howard L., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Concentration on Ignition Delays for Various Fuel-Oxygen-Nitrogen Mixtures at Elevated Temperatures

Description: Note presenting measurements of ignition delays for mixtures of ethane, n-butane, isobutane, hydrogen, or propane with oxygen and nitrogen using a flow system with two experimental procedures. Delays were measured over a range of temperatures for each gas. Results regarding a comparison among fuels and effect of experimental procedure on absolute values of ignition delay are provided.
Date: December 1956
Creator: Anagnostou, E.; Brokaw, R. S. & Butler, J. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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