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Considerations of the Total Drag of Supersonic Airfoil Sections

Description: The results of calculations of the viscous and pressure drags of some two-dimensional supersonic airfoils at zero lift are presented. The results indicate that inclusion of viscous drag alters many previous results regarding the desirability of certain airfoil shapes for securing low drags at supersonic speeds. At certain Reynolds and Mach numbers, for instance, a circular-arc airfoil may theoretically have less drag than the previously advocated symmetrical wedge-shape profile; although under … more
Date: July 1947
Creator: Ivey, H. Reese & Klunker, E. Bernard
Partner: UNT Libraries Government Documents Department
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Problems of Air-Borne Contamination in Handling of Pu F₄ Powders

Description: Abstract: Studies were made of the air-borne contamination present during the operation of reducing plutonium tetrafluoride powder to the metal. Equipment design changes were made and operation technique changes were made until the amount of contamination present during operations was well below tolerance levels.
Date: July 31, 1947
Creator: Kennedy, William R.; Dumrose, A. & Ludwig, A.
Partner: UNT Libraries Government Documents Department
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Beta-Counting Methods Applied to the Determination of Uranium in Low-Grade Ores

Description: The following report covers investigations on the application of the beta counter as an analytical tool for use in experiments on the extraction and concentration of uranium from low-grade (.005-.02 % uranium) shale and phosphate rock ores.
Date: July 1947
Creator: Doig, J. R.; Igelsrud, Iver; Nelson, H. R. & Schwartz, C. M.
Partner: UNT Libraries Government Documents Department
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Regional survey monthlies 1947

Description: This report provides the monthly radiation monitoring sampling surveys for 1947.
Date: July 30, 1947
Creator: Paas, H. J. & Berlin, W. C. Jr.
Partner: UNT Libraries Government Documents Department
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River water sampling Columbia and Yakima River water, T tests

Description: Data acquired form the sampling of Yakima River water-t Tests is presented. The sampling took place on June 24, 1947. The samples were analyzed for ph value, alkalinity, chlorine, harness, NH(sub 3), NO(sub 3), biological oxygen demand, dissolved oxygen, and turbidity.
Date: July 24, 1947
Creator: Butler, B. F.
Partner: UNT Libraries Government Documents Department
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River water sampling Yakima River water, work sheets

Description: Data acquired from the sampling of Yakima River water on June 24, 1947, is presented. The water was analyzed for temperature, hardness, turbidity, dissolved oxygen, chlorine, alkalinity, NO(sub 3), NH(sub 3), and ph value.
Date: July 24, 1947
Creator: Butler, B. F.
Partner: UNT Libraries Government Documents Department
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River water sampling

Description: This report contains a letter, written on July 25, 1947, concerning the sampling program at Columbia River. The author suggests reducing the sampling schedule. He states that chemical composition sampling should be reduced by one-fifth and radioactivity sampling be reduced by one-third. He suggests that only mid-channel samples are required for representative studies. He further states that weekly sampling should occur. By following these suggestions, the cost of the sampling program should be … more
Date: July 25, 1947
Creator: Lauder, D. H.
Partner: UNT Libraries Government Documents Department
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Waste disposal: Failure of T Plant underground metal waste line from Section 9

Description: On June 23, 1947, a hole was discovered in the earthen fill near the T Plant R-19 stairwell directly above the path followed by the underground waste lines from the canyon. Jetting of all canyon wastes to the 241 Buildings was stopped and the canyon process shut down. This report discusses repair and characterization procedures for the soils and waste line pipe.
Date: July 15, 1947
Creator: Chapman, V. R.
Partner: UNT Libraries Government Documents Department
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River water sampling, Yakima River water: Analysis of variance

Description: Data acquired form the sampling of Yakima River water July 24, 1947, is presented. The water was analyzed for hardness, turbidity, dissolved oxygen, ph value, alkalinity, chlorine, NH(sub 3), NO(sub 3), and total solids.
Date: July 24, 1947
Creator: Butler, B. F.
Partner: UNT Libraries Government Documents Department
open access

River water sampling Columbia River water: Analysis of variance

Description: Data acquired from the sampling of Columbia River water July 24, 1947, is presented. The water was analyzed for temperature, hardness, turbidity, dissolved oxygen, chlorine, ph value, NO{sub 3}, NH{sub 3}, total solids, and alkalinity.
Date: July 24, 1947
Creator: Butler, B. F.
Partner: UNT Libraries Government Documents Department
open access

Effect of exhaust pressure on the performance of a 12-cylinder liquid-cooled engine

Description: Report presenting a dynamometer-stand investigation to determine the effect of exhaust pressure on the performance of a 12-cylinder liquid-cooled aircraft engine equipped with a conventional exhaust collector. The results are presented in the form of curves that show the effect of exhaust pressure on engine power, charge-air flow, volumetric efficiency, inlet-manifold mixture temperature, exhaust-gas temperature, cylinder-head temperature, and heat rejected to the coolant.
Date: July 1947
Creator: Desmon, Leland G. & Doyle, Ronald B.
Partner: UNT Libraries Government Documents Department
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Theoretical and experimental data for a number of NACA 6A-series airfoil sections

Description: Report presenting theoretical and experimental data for NACA 6A-series basic thickness airfoils, which were designed to eliminate the trailing-edge cusp present in NACA 6-series sections. Results indicated that the section minimum-drag and maximum-lift characteristics of the 6-series and 6A-series airfoil sections are essentially the same. Drag, lift, pitching-moment characteristics, and aerodynamic center are also provided.
Date: July 1947
Creator: Loftin, Laurence K., Jr.
Partner: UNT Libraries Government Documents Department
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Effect of Geometric Dihedral on the Aerodynamic Characteristics of Two Isolated Vee-Tail Surfaces

Description: Note presenting force tests of two isolated vee-tail surfaces with various amounts of dihedral made to provide an experimental verification of a simplified vee-tail theory and the results are presented which were found to be in good agreement with calculations of previous reports. Plots of the basic test data and summaries of the data in the form of plots of the variation of static-stability derivatives and control-effectiveness parameters with dihedral angle are included.
Date: July 1947
Creator: Schade, Robert O.
Partner: UNT Libraries Government Documents Department
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Correlation of Experimental and Calculated Effects of Product of Inertia on Lateral Stability

Description: Report presenting a correlation of the experimental and calculated effects of the product of inertia on the stability of lateral oscillations of airplanes. The experimental and calculated boundaries were in good agreement with one another, but neglecting the product of inertia led to wide discrepancies. Results regarding stability and its influence on general flight behavior are provided.
Date: July 1947
Creator: McKinney, Marion O., Jr. & Drake, Hubert M.
Partner: UNT Libraries Government Documents Department
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Charts for the Determination of Supersonic Air Flow Against Inclined Planes and Axially Symmetric Cones

Description: Report presenting a set of charts for the convenient determination of flow conditions behind a shock wave and at the surface of inclined planes and axially symmetric cones located in a uniform frictionless supersonic air stream. Shock angle, static-pressure coefficient, static-pressure ratio, total-pressure ratio, Mach number ratio, and velocity ratio for two-dimensional and conical flow fields are plotted for a range of free-stream Mach numbers.
Date: July 1947
Creator: Moeckel, W. E. & Connors, J. F.
Partner: UNT Libraries Government Documents Department
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Experimental Studies of the Knock-Limited Blending Characteristics of Aviation Fuels 2: Investigation of Leaded Paraffinic Fuels in an Air-Cooled Cylinder

Description: Note presenting the relation between knock limit and blend composition of selected aviation fuel components individually blended with virgin base and with alkylate as determined in a full-scale air-cooled aircraft-engine cylinder. Results regarding mixture-response curves, relation of knock limit to blend composition, and correlation of knock ratings are provided.
Date: July 1947
Creator: Wear, Jerrold D. & Sanders, Newell D.
Partner: UNT Libraries Government Documents Department
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Comparisons of Theoretical and Experimental Lift and Pressure Distributions on Airfoils in Cascade

Description: Note presenting comparisons of theoretical and experimental airfoil lift coefficients and pressure distributions made for two cascades of entrance vanes and three cascades of blower blades with NACA 6-series airfoils, and for one cascade of turbine blades. Results regarding the entrance vanes, blower blades, turbine blades, and possibilities of three-dimensional effects are provided.
Date: July 1947
Creator: Katzoff, S.; Bogdonoff, Harriet E. & Boyet, Howard
Partner: UNT Libraries Government Documents Department
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A comparative study of weights and sizes of flat-plate exhaust-gas-to-air heat exchangers with and without fins

Description: Note presenting analytical comparisons of weights and volumes for flat-plate heat exchangers with the same calculated thermal output and friction pressure drop for three different fin configurations, including no fins, fins in both the air and exhaust gas passages, and fins in the air passages only. Two different heat exchangers were used and compared with predicted weights and volumes.
Date: July 1947
Creator: Tendeland, Thorval & Steinmetz, Charles P.
Partner: UNT Libraries Government Documents Department
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Icing Zones in a Warm Front System With General Precipitation

Description: Note presenting observation of the icing zones present in a warm front cloud system made during one of a series of flights designed to investigate the meteorological conditions conducive to the formation of ice on aircraft.
Date: July 1947
Creator: Lewis, William
Partner: UNT Libraries Government Documents Department
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Wind-tunnel investigation of the NACA 654-421 airfoil section with a double slotted flap and boundary layer control by suction

Description: Report presenting an investigation in the two-dimensional low-turbulence tunnel to find the effects of boundary-layer control on the aerodynamic characteristics of the NACA 65(sub 4)-421 airfoil section with a boundary-layer-control suction slot at 0.45 airfoil chord and a 0.32-airfoil-chord double slotted flap. The airfoil is designed primarily to obtain a high maximum lift coefficient. Results regarding lift and drag characteristics are provided.
Date: July 1947
Creator: Quinn, John H., Jr.
Partner: UNT Libraries Government Documents Department
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High-speed tests of an airfoil section cambered to have critical Mach numbers higher than those attainable with a uniform-load mean line

Description: Report presenting high-speed wind-tunnel tests to determine the aerodynamic characteristics of an NACA 6-series airfoil section cambered to have critical Mach numbers higher than those for an airfoil with the same design lift coefficient with a uniform-load type of mean camber line. Comparisons are made between the characteristics of the modified airfoil and those of the NACA 66-210 airfoil with a uniform-load type of mean camber line.
Date: July 1947
Creator: Graham, Donald J.
Partner: UNT Libraries Government Documents Department
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The Effects of Aerodynamic Heating and Heat Transfer on the Surface Temperature of a Body of Revolution in Steady Supersonic Flight

Description: Note presenting an approximate method for determining the convective cooling requirement in the laminar boundary layer region of a body of revolution in high-speed flight that was developed and applied to a sample body. The convective cooling requirements were found to be small for the range of Mach numbers considered, but increased rapidly with increasing Mach number.
Date: July 1947
Creator: Scherrer, Richard
Partner: UNT Libraries Government Documents Department
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A Method for Calculating the Heat Required for the Prevention of Fog Formations on the Inside Surfaces of Single-Panel Bullet-Resisting Windshields During Diving Flight

Description: Note presenting an investigation to provide a means for calculating the heat required for the prevention of fog formations on the inside surfaces of single-panel bullet-resisting windshields during diving flight. An analysis was made to provide relationships for the heat required considering the transient heating of the windshield during diving flight.
Date: July 1947
Creator: Selna, James & Zerbe, John E.
Partner: UNT Libraries Government Documents Department
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