Technical Report Archive & Image Library (TRAIL) - 32,776 Matching Results

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Experimental investigation of acceleration characteristics of a turbojet engine including regions of surge and stall for control applications

Description: The acceleration characteristics, in the region of maximum acceleration and compressor stall and surge, of an axial-flow turbojet engine with a fixed-area exhaust nozzle were determined by subjecting the engine to fuel flow steps, ramps, and ramps with a sine wave superimposed. From the data obtained, the effectiveness of an optimalizer type of control for this engine was evaluated. At all speeds above 40 percent of rated, a maximum acceleration was not obtained until the engine reached the poi… more
Date: December 20, 1954
Creator: Stiglic, Paul M.; Schmidt, Ross D. & Delio, Gene J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of Control Signals and the Nature of Stall and Surge Behavior in a Turbojet Engine

Description: Memorandum presenting an axial-flow turbojet engine operated on a sea-level static test stand to determine whether or not detectable signals were present in pressures and blade stresses that are usable as stall warnings in control applications. Surge and stall behavior were closely examined for the unique characteristics that could be used to control engine behavior in the vicinity of surge and stall. Results regarding a steady-state survey, acceleration study, investigation of an optimalizing … more
Date: December 20, 1954
Creator: Delio, G. J. & Stiglic, P. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of Stage Performance of J71 Three-Stage Turbine

Description: "An experimental investigation of the stage performance of the J71 three-stage turbine at design speed and pressure ratio was conducted as part of a program involving research on the design and operational characteristics of high-work-output multistage axial-flow turbines. The investigation indicated that the over-all work output of the turbine based on temperature measurements at design speed and pressure ratio was 95 percent of the design value, with the greatest loss in work output and effic… more
Date: December 20, 1954
Creator: Forrette, Robert E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Formulas Pertaining to Weak-Shocks

Description: Certain solutions of the cylindrical wave-equation, such as the Possio integral, which are needed in the investigation of 2-dimensional weak-shocks are are determined in this paper.
Date: December 20, 1954
Creator: Owens, O. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation to Mach number 2.0 of shock-positioning control systems for a variable-geometry inlet in combination with a J34 turbojet engine

Description: Report presenting shock-position controls designed to actuate the translating spike and variable bypass of a variable-geometry inlet in the 8- by 6-foot supersonic tunnel. The operation of the inlet was observed in combination with a J34 turbojet engine at a range of Mach numbers. Results regarding terminal-shock-positioning control systems and combination control are provided.
Date: December 20, 1954
Creator: Leissler, L. Abbott & Nettles, J. Cary
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Second Report on Liquid Metal Level Instrument

Description: The liquid metal level instrument will operate at tank temperatures up to 1000 F. Overall system accuracy depends on operating conditions, as described in the report. Test accuracies from 2 to 8% have been obtained from full to empty tank. The primary detector unit successfully passed navy HI shock test.
Date: December 21, 1954
Creator: Droma, Clarence R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Air Sample Activity vs Flow Rate

Description: A bibliography on the subject of air sample activity vs flow rate has been prepared. The findings in two documents reviewed have been applied directly to this problem. It is concluded that air sample activity is not dependent on flow rate when sampling particles whose average diameter in 0.06 micron or greater.
Date: December 27, 1954
Creator: Clark, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparison of low-speed rotor and cascade performance for medium-camber NACA 65-(C(sub lo)A(sub 10) 10 compressor-blade sections over a wide range of rotor blade-setting angles at solidities. of 1.0 and 0.5

Description: Report presenting testing of a medium-camber compressor rotor with particular NACA blades in a low-speed 28-inch test blower. Testing was made at solidities of 1.0 and 0.5 without guide vanes or stators over a wide range of blade-setting angles and quantity flow rates. Results regarding overall rotor performance, comparison between measured and estimated section efficiencies near design angle of attack, comparison between low-speed rotor and cascade turning angles, and detailed blade section pe… more
Date: December 27, 1954
Creator: Ashby, George C., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-Speed Measurements of Rolling and Yawing Stability Derivatives of a 60 Degree Delta-Wing Model

Description: Memorandum presenting an investigation in the free-flight tunnel to determine the low-speed rolling and yawing stability derivatives of a 60 degree delta-wing model from 0 to 30 degrees angle of attack. The derivatives were measured by the free-to-damp oscillation technique and by the steady-roll technique.
Date: December 27, 1954
Creator: Johnson, Joseph L., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Low-Speed Wind-Tunnel Investigation of Some Aspects of the Aerodynamic Problems Associated with Missiles Carried Externally in Positions Near Airplane Wings

Description: A low-speed wind-tunnel investigation has been made of some aspects of the aerodynamic problems associated with the use of air-to-air missiles when carried externally on aircraft. Measurements of the forces and moments on a missile model for a range of positions under the mid-semispan location of a 45deg sweptback wing indicated longitudinal and lateral forces with regard to both carriage and release of the missiles. Surveys of the characteristics of the flow field in the region likely to be tr… more
Date: December 27, 1954
Creator: Alford, William J., Jr.; Silvers, H. Norman & King, Thomas J., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Determination of Product Variability

Description: One of the distinguishing features of many chemical production processes is that the process variation is obscured by measurement errors which are of the same order of magnitude or greater. This paper will discuss some elementary means of estimating true product variability under these conditions.
Date: December 30, 1954
Creator: Bennett, Carl A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report on Interpretation and Evaluation of the Uranium Occurrences Near Goodsprings, Nevada

Description: From introduction: This report is based on the field and laboratory studies of the uranium mineralization in the vicinity of Goodsprings, Clark Co., Nevada. The location of the region is shown in figure 1.
Date: December 31, 1954
Creator: Barton, Paul B., Jr. & Behre, Charles H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interim Report on Free-Spinning-Tunnel Investigation of a 1/25-Scale Model of the McDonnell F3H-1N Airplane, TED No. NACA AD 3100

Description: "An investigation was conducted in the Langley 20-foot free-spinning tunnel on a 1/23-scale model of the McDonnell F3H-1N airplane. The effects of control settings and movements upon the erect and inverted spin and recovery characteristics of the model were determined for the clean condition. Spin-recovery parachute tests were also performed. The results indicated that erect spins obtained on the airplane for the take-off or combat loadings should be satisfactorily terminated if full rudder rev… more
Date: December 31, 1954
Creator: Lee, Henry A. & Wilkes, L. Faye
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interpretation and Evaluation of the Uranium Occurences Near Goodsprings, Nevada: Final Report

Description: Abstract: The uranium occurrences near Goodsprings, Clark Co., Nevada, are divided into two distinct types which differ from each other in geographic distribution, localization of mineralization, mineralogy and origin. None of the known deposits is of present commercial significance and therefore this study emphasizes the genetic rather than the economic aspects.
Date: December 31, 1954
Creator: Barton, Paul B., Jr. & Behre, Charles H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aerodynamic characteristics of NACA 0012 airfoil section at angles of attack from 0 degrees to 180 degrees

Description: Report presenting the aerodynamic characteristics of the NACA 0012 airfoil section at a range of angles of attack from 0 to 180 degrees. Data were obtained at two different Reynolds numbers depending on whether the airfoil surfaces were smooth or had roughness applied at the leading and trailing edges. After the stall with the rounded edge of the airfoil foremost, a second lift-coefficient peak was obtained at an angle of attack of about 45 degrees.
Date: January 1955
Creator: Critzos, Chris C.; Heyson, Harry H. & Boswinkle, Robert W., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Airborne Reconnaissance Project, Green River Basin, Wyoming

Description: Abstract: A part of the Green River Basin airborne reconnaissance project, re: memo to Phillip L. Merritt, March 12, 1954, Proposed Airborne Reconnaissance Project, Green River Basin, Wyoming, was completed during the months from July though October 1954. No uranium mineralization of commercial value was found.
Date: January 1955
Creator: Magleby, Dan N. & Meehan, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analog study of interacting and noninteracting multiple-loop control systems for turbojet engines

Description: The results of an analog investigation of several turbojet-engine control configurations is presented in this report. Both proportional and proportional-plus-integral controllers were studied, and compensating terms for engine interaction were added to the control system. Data were obtained on the stability limits and the transient responses of these various configurations. Analytical expressions in terms of the component transfer functions were developed for the configurations studied, and the… more
Date: 1955
Creator: Pack, George J. & Phillips, W. E., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Laminar Forced-Convection Heat Transfer in Entrance Region of Flat Rectangular Ducts

Description: From Introduction: "Beyond the position where the boundary layer treatment can no longer be used, curves have been faired to connect the Nusselt number results of the present analysis with those of reference 3, in which a parabolic velocity profile is assumed throughout the entire duct length. So that a comparison could be made with the results of reference 3, the boundary layer analysis was used to study the development of the temperature profile associated with a parabolic velocity profile th… more
Date: January 1955
Creator: Sparrow, E. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of uranium hexafluoride-hydrogen fluoride solutions by freezing point determination : errors caused by liquid -vapor equilibrium

Description: A report detailing the analysis of uranium hexafluoride-hydrogen fluoride solutions by their freezing point determination. This analysis was conducted by measuring vapor pressures at the freezing temperatures of different compositions of uranium hexafluoride-hydrogren fluoride solutions.
Date: 1955
Creator: Davis, W. & Kobisk, E. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Angular Distribution of Fragments from the Photofission of U238

Description: Ilford D1 and Eastman NTC nuclear emulsions have been loaded with a solution of uranium acetate and them exposed to the X-ray beam of the Case betatron operated at 18 Mev. The developed plates have been searched wit a Zeiss type microscope. A total number of 1062 fission tracks have been measured and analyzed and the angular distribution of the fission fragments in center of mas system has been obtained.
Date: 1955
Creator: Reineke, Z. L.; Finegan, J. D. & Shankland, Robert S., 1908-
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Annealing of crystal distortion in irradiated graphite

Description: From introduction: "As part of the program for improvement of graphite, the structural characteristics of graphite have been studied to determine the relation between physical and structural changes during irradiation."
Date: 1955
Creator: Austin, Alfred E. & Harrison, Ralph J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Apparatus for visual study of corrosion by hot water

Description: Report describing an apparatus for visual study of corrosion of uranium by hot water. A windowed autoclave was designed and constructed to permit visual study of the reaction under conditions simulating a cladding failure in service.
Date: 1955
Creator: Grieser, Daniel R. & Simons, Eugene M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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