National Advisory Committee for Aeronautics (NACA) - 2,223 Matching Results

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Charts Relating the Compressive Buckling Stress of Longitudinally Supported Plates to the Effective Deflectional and Rotational Stiffness of the Supports

Description: Report presenting a stability analysis of a long flat rectangular plate subjected to uniform longitudinal compressive stress and support along its longitudinal edges and one or more other longitudinal lines by elastic line supports. This was performed in order to provide more information about stabilization methods for thin-wing construction. The effective stiffness of different supports and the buckling observed in different structures is provided.
Date: August 1953
Creator: Anderson, Roger A. & Semonian, Joseph W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design Data for Multipost-Stiffened Wings in Bending

Description: From Summary: "The results of a computational program are presented which give numerical values of the stiffnesses required of the various components of a multipost-stiffened wing to achieve desired buckling-stress values under bending loads. Two arrangements of the posts are considered, upright posts and posts used as diagonals of a Warren truss. This work extends and summarizes the calculations presented in NACA RM L52K10a."
Date: January 1954
Creator: Anderson, Roger A.; Johnson, Aldie E., Jr. & Wilder, Thomas W., III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of three design parameters on the operating characteristics of 75-millimeter-bore cylindrical roller bearings at high speeds

Description: Report presenting three experimental investigation conducted with 75-millimeter-bore cylindrical roller bearings to determine the effects of roller axial clearance ratio, cage diametral clearance ratio, and cage land width-diameter ratio on bearing operating temperatures, wear, cage slip, and high-speed operating characteristics.
Date: October 1956
Creator: Anderson, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Performance of 110-millimeter-bore M-1 tool steel ball bearings at high speeds, loads, and temperatures

Description: Report presenting eleven 110-millimeter-bore ball thrust bearings made of M-1 tool steel were operated over a range of DN values at mean outer-race temperatures to 678 degrees Fahrenheit. Testing occurred at a variety of thrust loads, radial loads, oil flows, and oil inlet temperatures. Results regarding the difference between tests without heat addition and tests with heat addition, fatigue failures, performance of cage materials, and oil-interruption tests are provided.
Date: January 1957
Creator: Anderson, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Turbulent Shearing Stress in the Boundary Layer of Yawed Flat Plates

Description: Note presenting hot-wire anemometer measurements of the turbulent shearing stress in a turbulent boundary layer on a yawed flat plate. The measured velocity profiles are used to calculate the shear distribution and the result is compared with the result of experimental shear measurements.
Date: April 1958
Creator: Ashkenas, Harry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the Turbulent Boundary Layer on a Yawed Flat Plate

Description: Note presenting the problem of the effect of yaw on the turbulent boundary layer and skin friction of infinite cylinders, which is reviewed and compared with the case of laminar flow. The conclusion indicates that present understanding of the mechanism of turbulent shear does not permit exhaustion of two-dimensional data even to this elementary case of three-dimensional flow. Results regarding pressure distributions, two-dimensionality and flow direction, velocity profiles, virtual origin, virt… more
Date: April 1955
Creator: Ashkenas, Harry & Riddell, Frederick R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Operating Characteristics of an Acceleration Restrictor as Determined by Means of a Simulator

Description: Note presenting the operating characteristics of an acceleration restrictor which limits the normal acceleration of an airplane in maneuvers determined from tests on a simulator. The simulator consisted of a control stick geared to a magnetic brake unit and an analog computer which simulated the dynamic characteristics of the airplane.
Date: December 1954
Creator: Assadourian, Arthur
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat-Capacity Measurements of Titanium and of a Hydride of Titanium for Temperatures From 4 to 15 K Including a Detailed Description of a Special Adiabatic Specific-Heat Calorimeter

Description: Note presenting a description of an adiabatic specific-heat calorimeter bridging the interval between 4 and 15 degrees Kelvin temperatures. The instrument uses a constant-volume helium gas thermometer as the working thermometer. The instrument is tested on an alloy and a sample of pure titanium and the results are described.
Date: October 1956
Creator: Aven, M. H.; Craig, R. S. & Wallace, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of a Slat in Several Different Positions on an NACA 64A010 Airfoil for a Wide Range of Subsonic Mach Numbers

Description: Report presenting the two-dimensional aerodynamic characteristics of an NACA 64A010 airfoil with a slat at a range of Mach numbers. Two types of slat positions were investigated, one with the slat leading edge extended forward along the airfoil chord line and one with the slat extended forward and displaced below the chord line. Results regarding lift, drag, pitching moment, and pressure distribution are provided.
Date: March 1954
Creator: Axelson, John A. & Stevens, George L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Stress-Solvent Crazing on Tensile Strength of Polymethyl Methacrylate

Description: Note presenting an investigation of the loss of strength of tensile specimens of polymethyl methacrylate as a result of stress-solvent crazing at 23 degrees Celsius and 50-percent relative humidity. the materials tested were commercial cast polymethyl-methacrylate sheets of both heat-resistant and ordinary grades from each of two manufacturers.
Date: August 1951
Creator: Axilrod, B. M. & Sherman, Martha A.
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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Measurement of the Effect of an Axial Magnetic Field on the Reynolds Number of Transition in Mercury Flowing Through a Glass Tube

Description: Note presenting experiments conducted to determine the effect of a strong axial magnetic field on the flow of mercury through a circular channel. The magnetic induction was 15,000 gauss, and the channel was a pyrex tube 17-1/4 inches long and 0.027 inch inside diameter. The results indicated that the stabilizing effect occurred only at Reynolds number above 5,000, so that the region of practical applicability seems to be at fairly high Reynolds numbers and when there are only slight disturbance… more
Date: May 1958
Creator: Bader, Michel & Carlson, William C. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coefficient of friction and damage to contact area during the early stages of fretting 2: steel, iron, iron oxide, and glass combinations

Description: Report presenting experiments to study the start of fretting and cause of damage during the early stages of fretting of steel-steel combinations at a frequency 5 cycles per minute, an amplitude of 0.006 inch, a load of 150 grams, in air with relative humidity of less than 10 percent. Pure iron, glass, and iron oxide powder compacts were used in supplementary experiments.
Date: April 1954
Creator: Bailey, John M. & Godfrey, Douglas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effects of various parameters, including Mach number, on propeller-blade flutter with emphasis on stall flutter

Description: Report presenting an investigation of the effects of many of the parameters significant to wing flutter on several untwisted rotating models to determine their significance with respect to stall flutter of propeller blades. The parameters included torsional stiffness, section thickness ratio, sweepback, length-chord ratio, section center-of-gravity location, blade taper, Mach number, and fluid density. Results regarding the considerations on method of presentation, experimental data and discuss… more
Date: January 1955
Creator: Baker, John E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wall interference in wind tunnels with slotted and porous boundaries at subsonic speeds

Description: From Summary: "Linearized compressible-flow analysis is applied to the study of wind-tunnel-wall interference for subsonic flow in either two-dimensional or circular test sections having slotted or porous walls. Expressions are developed for evaluating blockage and lift interference."
Date: May 1954
Creator: Baldwin, Barrett S., Jr.; Turner, John B. & Knechtel, Earl D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Slip-Flow Heat Transfer From Cylinders in Subsonic Airstreams

Description: Report presenting over 1000 measured convective heat-transfer coefficients for normal cylinders in subsonic slip flow that have been correlated by using Nusselt number as a function of Reynolds and Knudsen (or Mach) numbers. A complicated nonlinear dependence of the heat-transfer coefficient to the difference between cylinder and recovery temperature is reported. The application of these results to hot-wire anemometry is also discussed.
Date: September 1958
Creator: Baldwin, Lionel V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Survey of Propulsion Using Chemical Energy Stored in the Upper Atmosphere

Description: Ram-jet cycles that use the chemical energy of dissociated oxygen for propulsion in the ionosphere are presented. After a review of the properties and compositions of the upper atmosphere, the external drag, recombination kinetics, and aerodynamic-heating problems of an orbiting ram jet are analyzed. The study indicates that the recombination ram jet might be useful for sustaining a satellite at an altitude of about 60 miles. Atmospheric composition and recombination-rate coefficients were too … more
Date: May 1958
Creator: Baldwin, Lionel V. & Blackshear, Perry L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reflection and Transmission of Sound by a Slotted Wall Separating Two Moving Fluid Streams

Description: "The reflection and transmission coefficients have been determined for a plane sound wave incident on a slotted wall separating two moving fluid streams. This acoustics problem is related to the aerodynamic problem of determining the tunnel-wall interference on an oscillating airfoil in a slotted-throat wind tunnel in that the same boundary condition is involved with one of the two streams at the boundary having zero velocity. In the analysis the wall with discrete slots is replaced by an equiv… more
Date: June 1958
Creator: Barger, Raymond L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Open Circular Holes on Tensile Strength and Elongation of Sheet Specimens of a Magnesium Alloy

Description: Note presenting an investigation of the effect of open circular holes on the tensile strength and elongation of sheet specimens of magnesium alloy AM-C52S in both the annealed and hard-rolled condition. Tests were made to study the effect of variable ratio of hole diameter to total specimen width and the effect of spacing and arrangement of the holes.
Date: June 1952
Creator: Barker, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of effects of sweep on the flutter of cantilever wings

Description: Report presenting an experimental and analytical investigation of the flutter of sweptback cantilever wings. The experiment employed groups of wings swept back by rotating and by shearing, with a range of angles of sweep tested. Comparison with experimental results indicated that the analysis is generally satisfactory for the main effects of sweep.
Date: June 1950
Creator: Barmby, J. G.; Cunningham, H. J. & Garrick, I. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Properties of aircraft fuels

Description: Report presenting a combination of two previously published reports with an extension of the data to cover properties of fuels up to temperatures as high as 400 degrees Fahrenheit.
Date: August 1956
Creator: Barnett, Henry C. & Hibbard, Robert R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Compressive Properties of Titanium Sheet at Elevated Temperatures

Description: "Results are presented of compressive stress-strain tests of titanium sheet at temperatures from room temperature up to 800 degrees Fahrenheit, exposure times of 1/2 to 2 hours, and strain rates of 0.002 to 0.006 per minute. The results show that titanium has favorable compressive properties, comparable to those in tension, up through 800 degrees Fahrenheit. Marked anisotropy in compression was also noted" (p. 1).
Date: February 1950
Creator: Barrett, Paul F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Experimental Determination of the Critical Bending Moment of a Box Beam Stiffened by Posts

Description: "An experimental determination of the critical bending moment of a box beam stiffened by posts is described and discussed. The experimental buckling load is in good agreement with that given by theory. Since appreciable distortion of the beam cross section occurred before the buckling load was reached, modification of post construction by the use of several ribs may be necessary for maintenance of the rectangular shape of the cross section" (p. 1).
Date: July 1951
Creator: Barrett, Paul F. & Seide, Paul
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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