Technical Report Archive & Image Library (TRAIL) - 89 Matching Results

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Analytical studies of the estimation of beryllium oxide in beryllium metal

Description: From abstract: The estimation of beryllium oxide in beryllium metal depending on the differential solubilities of the two material in dilute hydrochloric acid is presented. The results compare favorably with the present beryllium chloride volatilization procedure. Alternate methods are described, and the limitations and possible errors are discussed.
Date: April 17, 1951
Creator: Rynasiewicz, Joseph
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Approximate Calculation of Turbulent Boundary-Layer Development in Compressible Flow

Description: Note presenting numerical solutions of quantities appearing in the Karman momentum equation for the development of a turbulent boundary layer in plane and in radial compressible flows along thermally insulted surfaces in tabular form for a rnage of Mach numbers from 0.100 to 10. Through use of the tables, approximate calculation of boundary-layer growth is reduced to routine arithmetic computation.
Date: April 1951
Creator: Tucker, Maurice
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation of the lateral control of swept and unswept flexible wings of arbitrary stiffness

Description: A method similar to that of NACA rep. 1000 is presented for calculating the effectiveness and the reversal speed of lateral-control devices on swept and unswept wings of arbitrary stiffness. Provision is made for using either stiffness curves and root-rotation constants or structural influence coefficients in the analysis. Computing forms and an illustrative example are included to facilitate calculations by means of the method. The effectiveness of conventional aileron configurations and the m… more
Date: April 5, 1951
Creator: Diederich, Franklin W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparisons of the Effectiveness and Hinge Moments of All-Movable Delta and Flap-Type Controls on Various Wings

Description: A comparative evaluation was made for all-movable delta and flap-type controls on several wing plan forms. Comparison of these experimental results from various test facilities shows the effectiveness on various wing plan forms and an evaluation of hinge-moment characteristics of all-movable delta controls, swept trailing-edge flap, and straight trailing-edge flap-type controls.
Date: April 19, 1951
Creator: Stone, David G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conditions of the Formation of Fluorite in Sedimentary Rocks (The Fluorite System)

Description: From translator's abstract: "The formation of fluorite in sedimentary rocks has been investigated by studies of fluorite equilibria in different solutions. Determinations at different temperatures were made on the solubility of crystalline CaF2 in chemically pure water, in aqueous solutions of components of seat water...at different concentrations, and in the sea water itself at degrees of salinity varying from normal to a 15-fold concentration."
Date: April 1951
Creator: Kazakov, A. V. & Sokolova, E. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Considerations on a Large Hydraulic Jet Catapult

Description: Report presenting a survey of various types of catapults in connection with the problem of accelerating a large car along a track to a speed of 150 miles per hour. A hydraulic jet catapult seems to be the best-suited for the purpose, and various types of design problems are examined.
Date: April 12, 1951
Creator: Joyner, Upshur T. & Horne, Walter B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design and performance of an experimental axial-discharge mixed-flow compressor 3: over-all performance of impeller and supersonic-diffuser combination

Description: Report presenting an investigation of an axial-discharge impeller in combination with a 16-vaned supersonic diffuser cascade over a range of flow conditions at equivalent tip speeds varying from 800 to 1600 feet per second. Results regarding the overall performance of the combination, starting of diffuser cascade, use of flow bleedoff to aid starting, radial distribution of flow angle, flow characteristics within diffuser, and efficiency of diffuser cascade are provided.
Date: April 30, 1951
Creator: Wilcox, Ward W. & Robbins, William H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Design of Variable Mach Number Asymmetric Super-Sonic Nozzles by Two Procedures Employing Inclined and Curved Sonic Lines

Description: "Two theoretical procedures are developed for designing asymmetric supersonic nozzles for which the calculated exit flow is nearly uniform over a range of Mach numbers. One procedure is applicable at Mach numbers less than approximately 3. This approach yields, without iteration, a nozzle for which the calculated exit flow is uniform at two Mach numbers and, with proper design, is nearly uniform at Mach numbers between, slightly above, and slightly below these two" (p. 1).
Date: April 11, 1951
Creator: Syvertson, Clarence A. & Savin, Raymond C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Domestic Resource of Uranium and Thorium : A Summary Based Upon Investigations by the u.s. Geological Survey

Description: From abstract: "This report summarizes our knowledge of the geology of radioactive raw materials and outlines the work done by the Geological Survey as well as that planned or recommended. An evaluation of uranium and thorium deposits is given in terms of known reserves and potential resources."
Date: April 1951
Creator: McKelvey, V. E.; Page, L. R.; Fischer, R. P. & Butler, A. P., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of a deflectable wing-tip control on the low-speed lateral and longitudinal characteristics of a large-scale wing with the leading edge swept back 47.5 degrees

Description: Report presenting an investigation of the effect of a 20-percent-semispan deflectable wing-tip control on the low-speed lateral and longitudinal characteristics of a wing with the leading edge swept back 47.5 degrees, an aspect ratio of 3.5, and circular-arc-airfoil sections. The results indicate that the 20-percent-semispan wing-tip control should provide adequate lateral control over the angle-of-attack range investigated. Results regarding the effect of tip control on lateral characteristics… more
Date: April 26, 1951
Creator: Lange, Roy H. & Fink, Marvin P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Effect of an Arbitrary Surface-Temperature Variation Along a Flat Plate on the Convective Heat Transfer in an Incompressible Turbulent Boundary Layer

Description: Note presenting an analysis performed to determine the effects on the rates of convective heat transfer produced by variations of the surface temperature with distance along a flat plate. The analysis is confined to the case of a low-speed turbulent boundary layer on a flat plate oriented parallel to the free-stream velocity.
Date: April 1951
Creator: Rubesin, Morris W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Blade-Surface Finish on Performance of a Single-Stage Axial-Flow Compressor

Description: A set of modified NACA 5509-34 rotor and stator blades was investigated with rough-machine, hand-filed, and highly polished surface finishes over a range of weight flows at six equivalent tip speeds from 672 to 1092 feet per second to determine the effect of blade-surface finish on the performance of a single-stage axial-flow compressor. Surface-finish effects decreased with increasing compressor speed and with decreasing flow at a given speed. In general, finishing blade surfaces below the rou… more
Date: April 16, 1951
Creator: Moses, Jason J. & Serovy, George K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of End Plates, End Struts, and Depth of Submergence on the Characteristics of a Hydrofoil

Description: Report presenting an investigation into the effect of end plates and end-mounted struts on the lift-drag ratios of a hydrofoil at several speeds and Reynolds numbers that were all above the limiting speed of wave propagation. Information about the lift-drag ratio, effective aspect ratio, and comparison of the results versus theoretical calculations is included.
Date: April 12, 1951
Creator: Wadlin, Kenneth L.; Fontana, Rudolph E. & Shuford, Charles L., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Fuel Volatility on Performance of Tail-Pipe Burner

Description: Fuels having Reid vapor pressures of 6.3 and 1.0 pounds per square inch were investigated in a tail-pipe burner on an axial-flow-type turbojet engine at a simulated flight Mach number of 0.6 and altitudes from 20,000 to 45,000 feet. With the burner configuration used in this investigation, having a mixing length of only 8 inches between the fuel manifold and the flame holder, the low-vapor-pressure fuel gave lower combustion efficiency at a given tail-pipe fuel-air ratio. Because the exhaust-no… more
Date: April 30, 1951
Creator: Barson, Zelmar & Sargent, Arthur F., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of tail surfaces on the base drag of a body of revolution at Mach numbers of 1.5 and 2.0

Description: "Wind-tunnel tests were performed at Mach numbers of 1.5 and 2.0 to investigate the influence of tail surfaces on the base drag of a body of revolution without boattailing and having a turbulent boundary layer. The tail surfaces were of rectangular plan form of aspect ratio 2.33 and has symmetrical, circular-arc airfoil section. The results of the investigation showed that the addition of these tail surfaces with the trailing edges at or near the body base incurred a large increase in the base-… more
Date: April 1951
Creator: Spahr, J. Richard & Dickey, Robert R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The effect of thickness ratio on section thrust distribution as determined from a study of wake surveys of the NACA 4-(0)(03)-045 and 4-(0)(08)-045 two-blade propellers up to forward Mach numbers of 0.925

Description: Report presenting testing of two two-blade propellers in the 8-foot high-speed tunnel for a range of blade angles and Mach numbers. The results show that changes in thrust loading due to compressibility effects were much smaller for the thin-blade propeller than for the thick-blade propeller.
Date: April 5, 1951
Creator: Harrison, Daniel E. & Milillo, Joseph R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effectiveness of Thermal-Pneumatic Airfoil-Ice-Protection System

Description: From Summary: "Icing and drag investigations were conducted in the NACA Lewis icing research tunnel employing a combination thermal-pneumatic de-icer mounted on a 42-inch-chord NACA 0018 airfoil. The de-icer consisted of a 3-inch-wide electrically heated strip symmetrically located about the leading edge with inflatable tubes on the upper and lower airfoil surfaces aft of the heated area. The entire de-icer extended to approximately 25 percent of chord. A maximum power density of 9.25 watts per… more
Date: April 13, 1951
Creator: Gowan, William H., Jr. & Mulholland, Donald R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrical Resistivity Investigations of Carnotite Deposits in the Colorado Plateau

Description: From abstract: An investigation of the use of geophysical methods in prospecting for carnotite deposits in the Colorado Plateau was made by the Geophysics Branch of the U. S. Geological Survey between April 21 and June 24, 1949. Results of this preliminary work indicated that electrical resistivity methods could be used successfully.
Date: April 1951
Creator: Davis, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Exhaust Turbine and Jet Propulsion Systems

Description: DVL experimental and analytical work on the cooling of turbine blades by using ram air as the working fluid over a sector or sectors of the turbine annulus area is summarized. The subsonic performance of ram-jet, turbo-jet, and turbine-propeller engines with both constant pressure and pulsating-flow combustion is investigated. Comparison is made with the performance of a reciprocating engine and the advantages of the gas turbine and jet-propulsion engines are analyzed. Nacelle installation meth… more
Date: April 1951
Creator: Leist, Karl & Knörnschild, Eugen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental downwash and wake characteristics at subsonic and supersonic Mach numbers behind an unswept, tapered wing, of aspect ratio 2.67 with leading-and trailing-edge flaps

Description: Report presenting the effect of Mach number on the characteristics of the downwash and wake behind an unswept, tapered wing of aspect ratio 2.67 with full-span, 25-percent-chord, leading- and trailing-edge flaps has been determined from wind-tunnel tests. Results regarding downwash characteristics and wake characteristics are provided.
Date: April 20, 1951
Creator: Stivers, Louis S., Jr.; Walker, Harold J. & Beard, Luther, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Investigation of Localized Regions of Laminar-Boundary-Layer Separation

Description: Report presenting an investigation of the localized region of laminar separation behind the position of minimum pressure on an NACA 663-018 airfoil at zero angle of attack. A description of the behavior of the boundary layer and the resulting turbulence occurring from transition are provided.
Date: April 1951
Creator: Bursnall, William J. & Loftin, Laurence K., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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