Technical Report Archive & Image Library (TRAIL) - 120 Matching Results

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Analysis of a Pressure-Jet Power Plant for Helicopter

Description: From Introduction: "In comparison with the shaft-driven rotor, the jet rotor is shown in references 1 and 2 to provide direct reductions in helicopter empty weight and to increase the pay-load capacity by (1) eliminating the gear-reduction train between the rotor shaft and the power plant, (2) eliminating the antitorque tail rotor, and (3) using a power plant of low specific weight."
Date: March 28, 1955
Creator: Krebs, Richard P. & Miller, William S., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An analysis of accelerations, airspeeds, and gust velocities from three commercial operations of one type of medium-altitude transport airplane

Description: From Introduction: "Past analyses of data from the NACA V-G and the NACA VGH recorders (see, for example, refs. 1 and 2) have yielded information on the magnitude and frequency of occurrence of gust and maneuver accelerations, and the associated airspeeds and altitudes for several types of airplanes flown by different operators on various routes."
Date: March 1955
Creator: Coleman, Thomas L.; Copp, Martin R.; Walker, Walter G. & Engel, Jerome N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An analysis of once-per-revolution oscillating aerodynamic thrust loads on single-rotation propellers on tractor airplanes at zero yaw

Description: A simplified procedure is shown for calculating the once-per-revolution oscillating aerodynamic thrust loads on propellers of tractor airplanes at zero yaw. The only flow field information required for the application of the procedure is a knowledge of the upflow angles at the horizontal center line of the propeller disk. Methods are presented whereby these angles may be computed without recourse to experimental survey of the flow field. The loads computed by the simplified procedure are compar… more
Date: March 21, 1955
Creator: Rogallo, Vernon L.; Yaggy, Paul F. & McCloud, John L., III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Analysis of the Stability and Ultimate Compressive Strength of Short Sheet-Stringer Panels with Special Reference to the Influence of Riveted Connection Between Sheet and Stringer

Description: A method of strength analysis of short sheet-stringer panels subjected to compression is presented which takes into account the effect that the riveted attachments between the plate and the stiffeners have on the strength of the panels. An analysis of experimental data shows that panel strength is highly influenced by rivet pitch, diameter, and location and that the degree of influence for a given riveting depends on the panel configuration and panel material. (author).
Date: March 1955
Creator: Semonian, Joseph W. & Peterson, James P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An analysis of the transonic and supersonic performance of several fixed-geometry air inlets

Description: Report presenting an analysis of the maximum power thrust-minus-drag performance of several turbojet-engine air-inlet combinations over a wide range of flight conditions. The primary objective of the analysis was to use the experimentally determined drag and total-pressure-recovery characteristics to show the range of satisfactory performance of each of several fixed-geometry inlet configurations. Results regarding the performance at 35,000 feet, inlet design considerations, speed range of effi… more
Date: March 8, 1955
Creator: Pendley, Robert E. & Howell, Robert R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of V-G records from ten types of Navy airplanes in squadron operations during the period 1949 to 1953

Description: From Introduction: "The purpose of this paper is to present an analysis of the data for the remaining airplanes where the data were sufficient to warrant analysis. The data analyzed represent totals of 351 to 5660 hours of operations with ten types of Navy airplanes and were recorded during the period 1949 to 1953."
Date: March 25, 1955
Creator: Mayer, John P. & Harris, Agnes E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical determination of effect of water injection on power output of turbine-propeller engine

Description: From Introduction: "References 1 and 2 indicate that the sea-level static thrust of a centrigual-flow-type turbojet engine may be increased about 25 percent by use of liquid injection. Reference 3 indicates that greater thrust augmentation is possible at a compressor pressure ratio of 11 than of 4."
Date: March 1955
Creator: Ross, Albert O. & Huppert, Merle C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Brookhaven National Laboratory Annual Report: 1954

Description: Report issued by the Brookhaven National Laboratory discussing the work conducted by the lab during the fiscal year of 1954. As stated in the introduction, "the progress and trends of the research program are presented along with a description of the operational, service, and administrative activities of the Laboratory" (p. v).
Date: March 1955
Creator: Brookhaven National Laboratory
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calcium Uranium(IV) Fluoride; Precipitation and Reduction to Metal

Description: Using ferrous ion in the presence of fluoride for reducing uranium(VI) to the four state, the salt calcium uranium (IV) fluoride can be precipitated from uranyl nitrate solutions. X-ray studies have shown that the precipitate is a true double salt and not a mixture of the two insoluble fluorides of calcium and uranium. The salt settles rapidly and can be either filtered or centrifuged. Waste losses during precipitation and washing were on the order of 2.0 and 0.4 per cent, respectively. These w… more
Date: March 17, 1955
Creator: Tolley, W. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characteristics of loads in rough air at transonic speeds of rocket-powered models of a canard and a conventional-tail configuration

Description: Report presenting results from flight tests at transonic speeds for a canard and a conventional-tail rocket-powered model in continuous rough air. The use of an airspeed-fluctuation instrument for measuring the turbulence intensity experienced is described as well as the resulting improvement in the technique of testing rocket models in rough air. The short-period frequency was dominant in the center-of-gravity normal-acceleration response for both models.
Date: March 1, 1955
Creator: Vitale, A. James
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Stability of Purex and Uranium Recovery Process Solvent

Description: The desirability of operating many of the Purex columns at elevated temperatures, ca. 50-70 C, has made it necessary to obtain data on the stability of the solvent at these higher temperatures. Since the present diluent, Shell Spray Base, will not be entirely safe at the upper temperature limit, a number of diluents with higher flash point have been investigated concurrently with Shell Spray Base. This report presents data covering the first phases of this investigation, namely, the effect of n… more
Date: March 2, 1955
Creator: Moore, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A comparative analysis of the performance of long-range hypervelocity vehicles

Description: From Summary: "Long-range hypervelocity vehicles are studied in terms of their motion in powered flight, and their motion and aerodynamic heating in unpowered flight. Powered flight is analyzed for an idealized propulsion system which rather closely approaches present-day rocket motors. Unpowered flight is characterized by a return to earth along a ballistic, skip, or glide trajectory. Only those trajectories are treated which yield the maximum range for a given velocity at the end of powered f… more
Date: March 24, 1955
Creator: Eggers, Alfred J., Jr.; Allen, H. Julian & Neice, Stanford E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Concrete Cone Anchor Tests

Description: This study was initiated to determine the minimum safety requirements for safe anchorage of electric pole lines. The objectives were to investigate the suitability of manufactured concrete pole line anchors for use at the Hanford Atomic Products Operation, to design a concrete anchor slug of optimum shape and size for manufacture, to determine by field tests the resistance pullout of the concrete anchor when buried at various depths under the most favorable condition, and to develop a safe desi… more
Date: March 18, 1955
Creator: Buchols, C. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Description and bibliography of NACA research on wing controls: January 1946 - February 1955

Description: Report presenting some accompanying tables and bibliography for experimental aerodynamic studies in the field of wing controls during the period between January 1946 and February 1955. The tables are grouped according to the following major classifications: trailing-edge flap controls, leading-edge flap controls, and spoiler controls.
Date: March 24, 1955
Creator: Brewer, Jack D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a new flutter testing technique using a towed dynamic airplane model equipped with an automatic stabilizing system: Experimental and calculated dynamic stability characteristics for speeds up to 200 mph

Description: Report presenting testing of a towed airplane model in the 19-foot pressure tunnel in conjunction with the development of a flutter testing technique. The model was equipped with an autopilot to keep the model flying straight and level in the tunnel while restrained only in drag. Results regarding period and cycles to damp to half amplitude, time histories, and motions of the flexible wing model are provided.
Date: March 25, 1955
Creator: Schneider, William C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of the Higgins Continuous Ion Exchange Contactor for the Recovery of Uranium from Leached Ore Pulps

Description: From introduction: "The objective of this report is to present the results and describe the tests of both the 2-in. D and 6-in. D contractors using mill pulp feeds. Work on determining resign attrition is also reported. ORNL-CF-52-12-101 described the results of preliminary tests using synthetic ore pulps."
Date: March 25, 1955
Creator: Higgins, I. R.; Hancher, C. W. & Arehart, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Downwash survey behind two low-aspect-ratio variable-incidence wings in combination with three different size fuselages at a Mach number of 0.25

Description: A wind-tunnel investigation to determine the downwash angles in a transverse plane behind the wings of six wing-body combinations at Mach number 0.25. A triangular wing of aspect ratio 2.0 and a trapezoidal wing of aspect ratio 3.0 were tested in combination with three geometrically similar slender bodies of revolution.
Date: March 30, 1955
Creator: Hopkins, Edward J. & Sorensen, Norman E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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