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Investigation of the Aileron and tab of a spring-tab lateral-control system in the Langley 19-foot pressure tunnel

Description: Report presenting tests of a partial-span model of a large bomber-type airplane, which were conducted to provide data on the aerodynamic characteristics of the aileron-tab arrangement and of the wing. Testing occurred to determine the rolling-moment, yawing-moment, and hinge-moment characteristics of the aileron and tab and the effect of midchord wing slots on the characteristics of the wing and aileron and tab. Results regarding the aerodynamic and stalling characteristics of the wing and aero… more
Date: September 1947
Creator: Deters, Owen J. & Russell, Robert T.
Partner: UNT Libraries Government Documents Department
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100 Areas technical activities report: Engineering, August 1947

Description: There were seven charges of metal inspected during the month for corrosion and blistering studies. There were no unusual cases of blistering noted and the corrosion rates were normal for this time of year. Borescopic examination of the graphite packing around the ``B`` Hole in the F Pile revealed that the graphite is no more severely cracked than in the D Pile when it was inspected about a year ago. Examination of the graphite at the downstream and of Tube 1385-D did not indicate that any damag… more
Date: September 22, 1947
Creator: Woods, W. K.
Partner: UNT Libraries Government Documents Department
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Abstracts of Research and Development Reports

Description: This is a brief review of the status of the Redox Solvent Extraction Process. Two alternative flowsbeets are included. Planned and current operations are indicated.
Date: September 1, 1947
Creator: U.S. Atomic Energy Commission
Partner: UNT Libraries Government Documents Department
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Model Study of Wave and Surge Action, Naval Operating Base, Terminal Island, San Pedro, California

Description: The study reported herein was conducted in 1944 at the Waterways Experiment Station for the Bureau of Yards and Docks, U. S. Navy Department. Its purpose was to determine the best of several plans proposed for protecting the piers and dry docks at the Naval Operating Base, Terminal Island, San Pedro, California, from the effects of wave and surge action.
Date: September 1947
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department
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Progress Report for the Month of September, 1947 : Contract No. W-38-094-eng-27

Description: This report for September, 1947 describes progress regarding ore dressing and pyrometallurgical studies, chemical work, analytical work, identification work, and future work
Date: September 30, 1947
Creator: Bearse, A. E.; Center, E. J.; Igelsrud, Iver; Richardson, A. C. & Sullivan, J. D.
Partner: UNT Libraries Government Documents Department
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''Cutie Pie,'' A portable radiation instrument

Description: A portable beta and gamma radiation meter of exceedingly small dimensions and weight has been developed. User acceptance has been more enthusiastic than any previous instrument of its type. The circuit, using one Victoreen V-32 tube, is the simplest electronic circuit possible for radiation work and gives high sensitivity. Stability exceeds anything of comparable sensitivity which has come to our attention. The short term stability is due to a circuit which prevents emission before the cathode … more
Date: September 19, 1947
Creator: Ballou, C. O.
Partner: UNT Libraries Government Documents Department
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Icing Properties of Noncyclonic Winter Stratus Clouds

Description: Note presenting measurements of the vertical distribution of liquid water concentration and drop size made in winter stratus clouds in the absence of significant cyclonic or frontal activity. The observations indicate that the clouds are formed by turbulent mixing of the lower layers of the atmosphere, resulting in a region of constant specific humidity and adiabatic lapse rates.
Date: September 1947
Creator: Lewis, William
Partner: UNT Libraries Government Documents Department
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Comparison of the control-force characteristics of two types of lateral-control system for large airplanes

Description: Report presenting an analysis of wind-tunnel data for two types of lateral-control system for large airplanes in order to determine the control-force characteristics and rolling effectiveness of each system. The two types of control systems explored are a spring-tab aileron and a combination spoiler and guide or pilot-aileron arrangement.
Date: September 1947
Creator: Deters, Owen J.
Partner: UNT Libraries Government Documents Department
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Compressive strength of 24S-T aluminum-alloy flat panels with longitudinal formed hat-section stiffeners having a ratio of stiffener thickness to skin thickness equal to 1.00

Description: Report presenting results for a part of a test program on 24S-T aluminum-alloy flat compression panels with longitudinal formed hat-section stiffeners. This particular part of the program is concerned with panels in which the thickness of the stiffener material is equal to the thickness of the skin. Results regarding the hat-stiffened panels and a comparison of hat-stiffened and Z-stiffened panels are provided.
Date: September 1947
Creator: Hickman, William A. & Dow, Norris F.
Partner: UNT Libraries Government Documents Department
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A Study of Metal Transfer Between Sliding Surfaces

Description: Note presenting a study to determine the nature of the surfaces formed on hardened steel parts during rubbing, notably on piston rings and cylinders during run-in. The technique of measuring the small amounts of material transferred from one rubbing surface to another by making one radioactive is applied to hardened steel surfaces, both nitrided and non-nitrided, and to chromium-plated steel.
Date: September 1947
Creator: Sakmann, B. W.; Grossman, N. & Irvine, John W., Jr.
Partner: UNT Libraries Government Documents Department
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High-Speed Wind-Tunnel Tests of an NACA 0009-64 Airfoil Having a 33.4-Percent-Chord Flap With an Overhang 20.1 Percent of the Flap Chord

Description: Report presenting testing to investigate the effects of compressibility on a 5-inch-chord NACA 0009-64 airfoil section with a 33.4-percent-chord flap with a nose overhang and an unsealed gap. Flap effectiveness was generally found to increase with Mach number. Results regarding the lift, pitching moment, and hinge moment are provided.
Date: September 1947
Creator: Stevenson, David B. & Adler, Alfred A.
Partner: UNT Libraries Government Documents Department
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Investigation of the pressure-loss characteristics of a turbojet inlet screen

Description: Report presenting the results of an investigation to determine the static-pressure losses and total-pressure distributions of a turbojet inlet screen. The screen was tested in two configurations: one with the vane leading edges square and rough and the other with the vane leading edges rounded. Results regarding the static-pressure-loss coefficient, corrected static-pressure loss, and total-pressure distributions are provided.
Date: September 1947
Creator: Lankford, John L.
Partner: UNT Libraries Government Documents Department
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An application of lifting-surface theory to the prediction of angle-of-attack hinge-moment parameters for aspect ratio 4.5 wings

Description: Report presenting an investigation made of the angle-of-attack-type loading for an elliptical wing of aspect ratio 4.5 in an attempt to augment existing methods of prediction of finite span angle-of-attack hinge-moment parameters.
Date: September 1947
Creator: Jones, Arthur L.; Flanagan, Mildred G. & Sluder, Loma
Partner: UNT Libraries Government Documents Department
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Effect of variation in diameter and pitch of rivets on compressive strength of panels with Z-section stiffeners: Panels of various lengths with close stiffener spacing

Description: Report presenting an experimental investigation conducted to determine the effect of varying rivet diameter and pitch on the compressive strength of flat 24S-T aluminum-alloy panels with longitudinal Z-section stiffeners of the type for which design charts are available.
Date: September 1947
Creator: Dow, Norris F. & Hickman, William A.
Partner: UNT Libraries Government Documents Department
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The stability derivatives of low-aspect-ratio triangular wings at subsonic and supersonic speeds

Description: Report presenting low-aspect-ratio wings with triangular plan form, which are treated on the assumption that the flow potentials in planes at right angles to the long axis of the airfoils are similar to the corresponding two-dimensional potentials. Pressure distributions caused by downward acceleration, pitching, rolling, sideslipping, and yawing are obtained for wings with and without dihedral.
Date: September 1947
Creator: Ribner, Herbert S.
Partner: UNT Libraries Government Documents Department
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Method of designing vaneless diffusers and experimental investigation of certain undetermined parameters

Description: Report presenting a method of designing vaneless diffusers using data given for simple conical diffusers. A family of diffusers with three different cone angles and the same throat height was designed and experimentally studied. A second set of diffusers with varying throats with the best cone angle was also investigated.
Date: September 1947
Creator: Brown, W. Byron & Bradshaw, Guy R.
Partner: UNT Libraries Government Documents Department
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Laboratory Investigation of Ice Formation and Elimination in the Induction System of a Large Twin-Engine Cargo Aircraft

Description: "The icing characteristics, the de-icing rate with hot air, and the effect of impact ice on fuel metering and mixture distribution have been determined in a laboratory investigation of that part of the engine induction system consisting of a three-barrel injection-type carburetor and a supercharger housing with spinner-type fuel injection from an 18-cylinder radial engine used on a large twin-engine cargo airplane. The induction system remained ice-free at carburetor-air temperatures above 36 F… more
Date: September 1947
Creator: Coles, Willard D.
Partner: UNT Libraries Government Documents Department
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The effects of yawing thin pointed wings at supersonic speeds

Description: From Summary: "An approximate relation is derived for the surface velocity potential of thin pointed wings at supersonic speeds when they are contained within the Mach cone from the vertex. This relation is applied to obtain the pressure distributions, the lift and drag coefficients, the center of pressure, and the rolling moments as a function of angle of yaw for the delta wing. Theoretical curves are presented for a Mach number of the square root of 2 to illustrate the relations."
Date: September 1947
Creator: Evvard, John C.
Partner: UNT Libraries Government Documents Department
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Icing Properties of Noncyclonic Winter Stratus Clouds

Description: Note presenting measurements of the vertical distribution of liquid water concentration and drop size in winter stratus clouds in the absence of significant cyclonic or frontal activity. The observations indicate that the clouds are formed by turbulent mixing of the lower layers of the atmosphere, resulting in a region of constant specific humidity and adiabatic lapse rates. Calculations based on the observations were used to construct a graph that gives the liquid water concentration in terms … more
Date: September 1947
Creator: Lewis, William
Partner: UNT Libraries Government Documents Department
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Longitudinal Stability and Control of High-Speed Airplanes With Particular Reference to Dive Recovery

Description: "An analysis of the effects of compressibility on the longitudinal stability, control, and trim of airplanes flying at high subsonic speeds and a discussion of the causes of and the means for lessening or preventing the diving tendency are presented. Wind-tunnel results for Mach numbers up to 0.90 are included for purposes of illustration and cover several investigations of longitudinal stability and control, airfoil characteristics, dive-recovery aids, and elevator characteristics. Methods are… more
Date: September 4, 1947
Creator: Axelson, John A.
Partner: UNT Libraries Government Documents Department
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A summary and analysis of data on dive-recovery flaps

Description: From Summary: "The results of numerous unrelated tests of dive-recovery flaps are collected in this report and presented in a form suitable for use in the preliminary design of dive-recovery flap installations. Since the data were obtained for airplane models of quite widely varying configurations, and are limited largely to a Mach number of 0.80, it is recommended that each new installation be carefully flight-tested before final approval. A flight-test procedure is outlined which will insure … more
Date: September 9, 1947
Creator: Boddy, Lee E. & Williams, Walter C.
Partner: UNT Libraries Government Documents Department
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An analysis of longitudinal-control problems encountered in flight at transonic speeds with a jet-propelled airplane

Description: From Introduction: "This report presents an analysis based on flight and wind-tunnel test data directed toward the determination of the probable cause of the pitch-up. Wing pressure distribution and stability and control characteristics in the dive are also included."
Date: September 25, 1947
Creator: Brown, Harvey H.; Rolls, L. Stewart & Clousing, Lawrence A.
Partner: UNT Libraries Government Documents Department
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Flight investigation of the heat requirements for ice prevention on aircraft windshields

Description: Report presenting a flight investigation conducted to establish the heat requirements for ice prevention on aircraft windshields mounted on the forebody of an airplane at several angles. Electrically heated windshields were used in order to provide accurate measuring of heat input to the windshield. Results regarding the quantity of heat provided, amount of water collection, ideal windshield angle, ranges in airplane velocity, and icing conditions are provided.
Date: September 5, 1947
Creator: Kleinknecht, Kenneth S.
Partner: UNT Libraries Government Documents Department
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