National Advisory Committee for Aeronautics (NACA) - 74 Matching Results

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Interference of Wing and Fuselage From Tests of 30 Combinations With Triangular and Elliptical Fuselages in the NACA Variable-Density Tunnel

Description: Note presenting tests of 12 wing-fuselage combinations employing triangular and 18 employing elliptical fuselages made in the NACA variable-density tunnel as part of a program to investigate at large values of Reynolds number the aerodynamic effects of wing-fuselage interference. The parameters of combination covered in the investigation were the vertical position of the wing with respect to the fuselage axis, wing shape, and wing-fuselage juncture shape.
Date: May 1947
Creator: Sherman, Albert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation at low speed of the longitudinal stability characteristics of a 60 degree swept-back tapered low-drag wing

Description: Report presenting an investigation made in the 300 mph 7- by 10-foot tunnel to determine at low speed in the longitudinal stability characteristics of a 60 degree sweptback, tapered, low-drag wing of aspect ratio 2.55. The results show undesirably large changes in the longitudinal stability characteristics of the 60 degree sweptback wings.
Date: May 1947
Creator: Lowry, John G. & Schneiter, Leslie E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Axial-Flow Fan and Compressor Rotors Designed for Three-Dimensional Flow

Description: "An investigation has been conducted to determine whether three-dimensional flows may be utilized in axial-flow fan and compressor rotors so that the spanwise load distribution may be varied to obtain high pressure rise. Two rotors, one with approximately uniform and one with solid-body downstream tangential-velocity distributions, were designed and tested at the design blade angle" (p. 1).
Date: May 2, 1947
Creator: Kahane, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Effect of Span, Spanwise Location, and Chordwise Location of Spoilers on Lateral Control Characteristics of a Tapered Wing

Description: Note presenting a wind-tunnel investigation of the effect of span, spanwise location, and chordwise location of spoilers on the lateral control characteristics of an unflapped semispan wing equipped with a simple spoiler with a projection 5 percent of the chord. The chordwise investigation involved moving a 50-percent-semispan spoiler from the 50-percent-chord station to the 80-percent-chord station. Results regarding the plain-wing characteristics, spanwise investigation, and chordwise investi… more
Date: May 1947
Creator: Fischel, Jack & Tamburello, Vito
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Stability and Control Characteristics of an Airplane Model With Skewed Wing in the Langley Free-Flight Tunnel

Description: Note presenting an investigation to determine the stability and control characteristics of an airplane model with a skewed wing in the free-flight tunnel. Flight tests, force tests, and damping-in-roll tests were made on the model with the wing set at angles of skew from 0 to 60 degrees. The investigation was of an exploratory nature and was intended to provide only a preliminary and qualitative indication of whether such a design could be flown.
Date: May 1947
Creator: Campbell, John A. & Drake, Hubert M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Investigation of the Effect of Blade Curvature on Centrifugal-Impeller Performance

Description: Note presenting an investigation of three centrifugal impellers, the same except for angular blade curvature, to determine the effect of the distribution of blade loading on impeller performance. Results regarding impeller efficiency, energy addition and pressure ratio, flow characteristics, and operating range are provided.
Date: May 1947
Creator: Anderson, Robert J.; Ritter, William K. & Dildine, Dean M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An investigation of the high-temperature properties of chromium-base alloys at 1350 F

Description: Report presenting data for alloys that can resist temperatures up to 1350 degrees Fahrenheit so that they can be used in gas turbines. The chromium-base alloys currently have certain severe limitations in their present state of development. However, considerable progress has been made in overcoming these difficulties and further improvement seems possible.
Date: May 1947
Creator: Freeman, J. W.; Reynolds, E. E. & White, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Iterative Interference Methods in the Design of Thin Cascade Blades

Description: Note presenting an application of the iterative interference method to three problems concerning the design of cascades. The three problems considered include the determination of the shape and setting of thin blades with a prescribed type of vortex distribution, determination of the shape and setting of thin blades with certain prescribed types of pressure distributions, and determination of the blade setting for a cascade of given airfoil shape and solidity.
Date: May 1947
Creator: Diesendruck, Leo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Landing Characteristics in Waves of Three Dynamic Models of Flying Boats

Description: Powered models of three different flying boats were landed in oncoming wave of various heights and lengths. The resulting motions and acceleration were recorded to survey the effects of varying the trim at landing, the deceleration after landing, and the size of the waves. One of the models had an unusually long afterbody. The data for landing with normal rates of deceleration indicated that the most severe motions and accelerations were likely to occur at some period of the landing run subsequ… more
Date: May 7, 1947
Creator: Benson, James M.; Havens, Robert F. & Woodward, David R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Langley Two-Dimensional Low-Turbulence Pressure Tunnel

Description: "A description is presented of the Langley two-dimensional low-turbulence pressure tunnel and a history is given of the work done at the Langley Memorial Aeronautical Laboratory which led to the achievement of a remarkably low level of turbulence in the air stream of this wind tunnel. The types of investigations to which the tunnel is suited and the methods of obtaining and correcting data are also discussed" (p. 1).
Date: May 1947
Creator: von Doenhoff, Albert E. & Abbott, Frank T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Lifting-Surface-Theory Solution and Tests of an Elliptic Tail Surface of Aspect Ratio 3 with a 0.5-Chord 0.85-Span Elevator

Description: Note presenting an electromagnetic-analogy model of the vortex load, estimated from lifting-line theory with an arbitrary fairing near the elevator tip, on a thin elliptic horizontal tail surface of aspect ratio 3 with a 0.5-chord 0.85-span plain elevator was constructed and tested. A comparison of the aspect-ratio corrections for the partial-span elevators was made with those previously presented for full-span elevators. Wind-tunnel results for a tail surface of the some plan form are presente… more
Date: May 1947
Creator: Swanson, Robert S.; Crandall, Stewart M. & Miller, Sadie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Location of Detached Shock Wave in Front of a Body Moving at Supersonic Speeds

Description: "It is shown that for velocities slightly in excess of sonic, the position of detached shock wave located in front of a given body at zero angle of attack may be estimated theoretically to a reasonable degree of accuracy. In case of bodies of revolution the result was simple, but for two-dimensional bodies, pressure coefficient varies with Mach number, and slight difficulty appears. Theory developed compares favorably with available experimental data" (p. 1).
Date: May 6, 1947
Creator: Laitone, Edmund V. & Pardee, Otway O'M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-speed stability and damping-in-roll characteristics of some highly swept wings

Description: Report presenting tests to determine the low-speed stability, damping-in-roll, and stall characteristics of five wings, three wings with 42 degrees sweepback and aspect ratio 5.9, 3, and 2, and tow wings with 33 degrees sweepforward and aspect ratios of 5.9 and 3. The results showed that the wings of aspect ratio 5.9 were longitudinally unstable at the stall but that reducing the aspect ratio tended to eliminate the instability.
Date: May 1947
Creator: Maggin, Bernard & Bennett, Charles V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-speed tests of five NACA 66-series airfoils having mean lines designed to give high critical Mach numbers

Description: Report presenting an investigation of the possibility of developing an airfoil to carry lift without decreasing the critical Mach number below that of the basic thickness form at zero lift. Low-speed testing of five NACA 66-series airfoil sections with a thickness-chord ratio of 0.16 was carried out in the two-dimensional low-turbulence pressure tunnel. Results regarding the design lift coefficient, maximum lift coefficient, low-drag range, and pitching-moment coefficients are provided.
Date: May 1947
Creator: von Doenhoff, Albert E.; Stivers, Louis S., Jr. & O'Connor, James M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurements of the Pressure Distribution on the Horizontal Tail Surface of a Typical Propeller-Driven Pursuit Airplane in Flight 2: The Effect of Angle of Sideslip and Propeller Operation

Description: Report presenting measurements in sideslipping flight of the pressure distribution over the horizontal tail surface of a tractor-propeller-driven pursuit airplane to determine the effects of angle of sideslip and propeller operation on the tail-load distribution. Results regarding the reduction of data, effect of sideslip and power on tail loads, effect of sideslip and power on tail moments, and a comparison of the calculated loading with experimental results.
Date: May 1947
Creator: Sadoff, Melvin & Clousing, Lawrence A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Performance of Compressor of XJ-41-V Turbojet Engine 2 - Static-Pressure Ratios and Limitation of Maximum Flow at Equivalent Compressor Speed of 8000 RPM

Description: "At the request of the Air Material Command, Army Air Forces, an investigation was conducted by the NACA Cleveland laboratory to determine the performance characteristics of the compressor of the XJ-41-V turbojet engine. This report is the second in a series presenting the compressor performance and analysis of flow conditions in the compressor. The static-pressure variation in the direction of flow through the compressor and the location and the cause of the maximum flow restriction at an equi… more
Date: May 6, 1947
Creator: Dildine, Dean M. & Arthur, W. Lewis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Investigation of Two Full-Scale Propellers to Determine the Effect of Swept-Back Blade Tips on Propeller Aerodynamic Characteristics

Description: Report presenting an investigation of two 10-foot-diameter three-blade propellers to determine the effect of swept-back blade tips on propeller aerodynamic characteristics. Results regarding the effect of swept-back tips on maximum efficiency and constant-power propeller operation are provided.
Date: May 12, 1947
Creator: Evans, Albert J. & Klunker, E. Bernard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Preparation and Physical Properties of Several Aliphatic Hydrocarbons and Intermediates

Description: Note presenting an investigation of the knock ratings of aliphatic hydrocarbons, pure paraffins and olefins prepared in quantities sufficient for engine tests. The report describes the methods of preparation and purification of three pentanes, four hexanes, three heptanes, four octanes, eight nonanes, seven decanes, four hexenes, five octenes, six nonenes, six decenes, and a number of alcohols, ketones, esters, and alkyl halides.
Date: May 1947
Creator: Howard, Frank L.; Mears, Thomas W.; Fookson, A.; Pomerantz, Philip & Brooks, Donald B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rocket Power Plants Based on Nitric Acid and their Specific Propulsive Weights

Description: "Two fields are reserved for the application of rocket power plants. The first field is determined by the fact that the rocket power plant is the only type of power plant that can produce thrust without dependence upon environment. The second field is that in which the rocket power plant proves itself the most suitable as a high-power drive in free competition with other types of power plants" (p. 1).
Date: May 1947
Creator: Zborowski, Helmut
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some Considerations of the Lateral Stability of High-Speed Aircraft

Description: Note presenting an investigation to determine the effect of variations in the lateral-stability derivatives, wing loading, altitude, and radii of gyration on the combination of directional stability and effective dihedral required for lateral stability at the landing and cruising condition. The results of the investigation showed that an airplane with a high wing loading designed for high-speed and high-altitude flight would be laterally stable if the moments of inertia, the location of the pri… more
Date: May 1947
Creator: Sternfield, Leonard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Some Investigations of the General Instability of Stiffened Metal Cylinders 8: Stiffened Metal Cylinders Subjected to Pure Torsion

Description: "An experimental investigation of the general instability of reinforced thin-walled metal cylinders was carried out at the California Institute of Technology. The basic parameters involved were the spacing and sectional properties of the stiffening elements, the wall thickness, and the diameter of the cylinder. An analysis of the experimental data led to a suitable parameter for estimating the general instability stress of reinforced metal cylinders when subjected to pure torsion loading" (p. 1… more
Date: May 1947
Creator: Dunn, Louis G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spin and Recovery Characteristics of the Curtiss-Wright XP-87 Airplane

Description: "The spin and recovery characteristics of the Curtiss-Wright XP-87 airplane, as well as the spin-recovery parachute requirements, the control forces that would be encountered in the spin, and the best method for the crew to attempt an emergency escape, are presented in this report. The characteristics were estimated rather than determined by model tests because the XP-87 dimensional and mass characteristics were considered to be noncritical and because data were available from model tests of se… more
Date: May 26, 1947
Creator: Berman, Theodore
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stresses in and general instability of monocoque cylinders with cutouts 3: calculation of the buckling load of cylinders with symmetric cutout subjected to pure bending

Description: Report presenting a strain-energy theory for the calculation of the buckling load in pure bending of reinforced monocoque cylinders with a symmetric cutout on the compression side and buckle according to the general instability pattern.
Date: May 1947
Creator: Hoff, N. J.; Boley, Bruno A. & Klein, Bertram
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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