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 Collection: Technical Report Archive and Image Library
Resume of Present Data on Load Distribution on Slots and Flaps, Special Report

Resume of Present Data on Load Distribution on Slots and Flaps, Special Report

Date: April 1, 1934
Creator: Wenzinger, Carl J.
Description: This report covers a study of the generally available data on load distribution on slots and flaps. The study was made by the National Advisory Committee for Aeronautics at the request of the Material Division, Army Air Corps to furnish information applicable to design criteria for slots and flaps of various types. The data are presented in three main sections: slots (Handley page type), auxiliary airfoils (fixed), and flaps.
Contributing Partner: UNT Libraries Government Documents Department
Resume of Producer-Gas Investigations: October 1, 1904-June 30, 1910

Resume of Producer-Gas Investigations: October 1, 1904-June 30, 1910

Date: 1911
Creator: Fernarld, R. H. & Smith, C. D.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Resume of the activities of the Aeronautical Experimental Institute, Rome, during the months of May, June, July and August 1921

Resume of the activities of the Aeronautical Experimental Institute, Rome, during the months of May, June, July and August 1921

Date: July 1, 1922
Creator: unknown
Description: This report is a listing of the different studies conducted by the Institute in May thru August of 1921. The aerodynamical section studied: the aerodynamical characteristics of a very thick concave-convex wing; the disturbance caused in a tunnel by the presence of a disk, placed in relation with a transversely infinite barrier; vertical pressure in a wing of low head resistance; the drag caused by two small doors in the sides of the fuselage. Some other studies conducted by the Institute included: depressions in the interior of the model of a wing; the influence of a conical casing fitted with helicoidal flanges centered on the hub of the propeller; the influence of the velocity of translation on the aerodynamical effects of the propeller; and the influence of a honeycomb placed in the tunnel.
Contributing Partner: UNT Libraries Government Documents Department
A resume of the advances in theoretical aeronautics made by Max M. Munk

A resume of the advances in theoretical aeronautics made by Max M. Munk

Date: January 1, 1926
Creator: Ames, Joseph S
Description: In order to apply profitably the mathematical methods of hydrodynamics to aeronautical problems, it is necessary to make simplifications in the physical conditions of the latter. To begin with, it is allowable in many problems, as Prandtl has so successfully shown, to treat the air as having constant density and as free of viscosity. But this is not sufficient. It is also necessary to specify certain shapes for the solid bodies whose motion through the air is discussed, shapes suggested by the actual solids - airships or airfoils - it is true, but so chosen that they lead to solvable problems. In a valuable paper presented by Dr. Max M. Munk, of the National Advisory Committee for Aeronautics, Washington, to the Delft Conference in April, 1924, these necessary simplifying assumptions are discussed in detail. It is the purpose of the present paper to present in as simple a manner as possible some of the interesting results obtained by Dr. Munk's methods.
Contributing Partner: UNT Libraries Government Documents Department
Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

Date: April 1, 1921
Creator: Rateau, A
Description: Though dissimilar, these two subjects have been united because they have some points in common. The computation of the movement of an airplane can only be correctly established if we are in a position to know exactly the thrust and resisting torque of the propeller for the various values of slip, which may vary greatly according to circumstance. The first part of the work concerns propellers and introduces as a fundamental variable, the true slip (delta) with respect to the effective pitch, which is the advance per revolution of the propeller corresponding to no thrust. The second part deals with characteristic curves of an airplane.
Contributing Partner: UNT Libraries Government Documents Department
Resume of wind-tunnel data on the effect of external stores on stability of models of military airplanes

Resume of wind-tunnel data on the effect of external stores on stability of models of military airplanes

Date: December 19, 1946
Creator: Silvers, H Norman & Vogler, Raymond D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Retrogressive Failures in Sand Deposits of the Mississippi River, Report 1: Field Investigations, Laboratory Studies and Analysis of the Hypothesized Failure Mechanism

Retrogressive Failures in Sand Deposits of the Mississippi River, Report 1: Field Investigations, Laboratory Studies and Analysis of the Hypothesized Failure Mechanism

Date: June 1988
Creator: Torrey, Victor H., III; Dunbar, Joseph B. & Peterson, Richard W.
Description: First report regarding geotechnical field investigations meant to apply current state-of-the-art knowledge and methods to assessing the in situ characteristics of susceptible point bar deposits below Baton Rouge.
Contributing Partner: UNT Libraries Government Documents Department
Retrogressive Failures in Sand Deposits of the Mississippi River, Report 2: Empirical Evidence in Support of the Hypothesized Failure Mechanism and Development of the Levee Safety Flow Slide Monitoring System

Retrogressive Failures in Sand Deposits of the Mississippi River, Report 2: Empirical Evidence in Support of the Hypothesized Failure Mechanism and Development of the Levee Safety Flow Slide Monitoring System

Date: June 1988
Creator: Torrey, Victor H., III
Description: This report represents a continuation of efforts by the Lower Mississippi Valley Division (LMVD), US Army Corps of Engineers, to develop an effective plan for and means of protecting the integrity of main line Mississippi River levees from the threat of flow slides in sand deposits.
Contributing Partner: UNT Libraries Government Documents Department
Reuse and Subsurface Injection of Municipal Sewage Effluent: Two Case Histories

Reuse and Subsurface Injection of Municipal Sewage Effluent: Two Case Histories

Date: 1971
Creator: Donaldson, Erle C. & Bayazeed, Abdo F.
Description: Report issued by the U.S. Bureau of Mines discussing sewage disposal and reuse. As stated in the introduction, "this paper describes the renovation of municipal sewage water for industrial use, and the use of subsurface waste disposal by an industrial complex and by a city" (p. 1). This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Reverse Osmosis for Water Desalination

Reverse Osmosis for Water Desalination

Date: May 22, 1964
Creator: Lonsdale, H. K.; Merten, U.; Riley, R. L.; Vos, K. D. & Westmoreland, J. C.
Description: Report issued by the Office of Saline Water over studies conducted on the reverse-osmosis program. The methods of desalination through osmosis are discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
The reversibility theorem for thin airfoils in subsonic and supersonic flow

The reversibility theorem for thin airfoils in subsonic and supersonic flow

Date: January 1, 1950
Creator: Brown, Clinton E
Description: A method introduced by Munk is extended to prove that the light-curve slope of thin wings in either subsonic flow or supersonic flow is the same when the direction of flight of the wing is reversed. It is also shown that the wing reversal does not change the thickness drag, damping-in-roll parameter or the damping-in-pitch parameter.
Contributing Partner: UNT Libraries Government Documents Department
A Review and Analysis of Fortran 8x

A Review and Analysis of Fortran 8x

Date: October 1987
Creator: Smith, Brian T.
Description: The ANSI Standards Subcommittee X3J3 on Fortran has recently completed a draft proposed standard for the Fortran programming language. The draft proposed standard, known informally as Fortran 8x, is a revision of the current standard X3.9-1978, known informally as Fortran 77. This report is a review of Fortran 8x and consists of a series of six articles. The first article gives a general overview of Fortran 8x. The next three articles give brief discussions of the array facilities; the enhanced numeric facilities; and user-defined data types, procedure interfaces, and the new program unit called a module. The fifth article provides a brief analysis of the controversial issues discussed by X3J3 (including both the accepted and rejected facilities for Fortran 8x). The sixth article gives a brief comparison with Ada. The report concludes with a summary giving information on how and where to express opinions of the draft proposed standard.
Contributing Partner: UNT Libraries Government Documents Department
Review and Analysis of Spray Combustion as Related to Alternative Fuels

Review and Analysis of Spray Combustion as Related to Alternative Fuels

Date: September 1979
Creator: Black, C. H.; Chiu, H. H.; Fischer, J. & Clinch, J. M.
Description: A review was conducted during the period of mid-June to mid-August 1979, of the literature on spray combustion. Particular attention has been paid to theoretical and experimental work on droplet and spray combustion applicable to the use of alternate fuels, mainly liquid fuels derived from coal and shale.
Contributing Partner: UNT Libraries Government Documents Department
Review and Evaluation of Extractants for Strontium Removal Using Magnetically Assisted Chemical Separation

Review and Evaluation of Extractants for Strontium Removal Using Magnetically Assisted Chemical Separation

Date: November 1995
Creator: Bauer, C. B.; Rogers, R. D.; Nuñez, Luis; Ziemer, M. D.; Pleune, T. T. & Vandegrift, G. F.
Description: A literature review on extractants for strontium removal was initially performed at Northern Illinois University to assess their potential in magnetically assisted chemical separation. A series of potential strontium extractants was systematically evaluated there using radioanalytical methods. Initial experiments were designed to test the uptake of strontium from nitric acid using several samples of magnetic extractant particles that were coated with various crown ether ligands. High partition coefficient (K(sub d)) values for stimulant tank waste were obtained. Further studies demonstrated that the large partitioning was due to uncoated particles.
Contributing Partner: UNT Libraries Government Documents Department
Review and investigation of unsatisfactory control characteristics involving in stability of pilot-airplane combination and methods for predicting these difficulties from ground tests

Review and investigation of unsatisfactory control characteristics involving in stability of pilot-airplane combination and methods for predicting these difficulties from ground tests

Date: August 21, 1953
Creator: Phillips, William H; Brown, B Porter & Matthews, James T , Jr
Description: A number of examples are presented of control difficulties not completely covered by existing handling-qualities requirements. 520/3:*:These control difficulties appear to result from a tendency for dynamic instability of the combination of pilot, control system, and airplane. The unsatisfactory characteristics involved have been encountered most frequently with hydraulic-power control systems. The nature of the difficulties may range from a slight interference with the ability of the pilot to hold precisely straight and level flight to a dangerous tendency toward divergent short-period oscillations which require constant attention of the pilot to control. Tests of a bomber and a fighter airplane with experimental power control systems have been made to study this problem further. The results of the investigation show that control difficulties of the type considered have always been associated with a marked phase difference between the pilot's control force and the associated control-surface deflection. The presence of static friction in the control valves of hydraulic-power control systems was found to be the explanation for unsatisfactory characteristics in several airplanes equipped with such systems. The valve friction may cause a phase lag between the pilot's control force and the associated control-surface deflection approaching 180 degrees at small control deflections. Definite limits ...
Contributing Partner: UNT Libraries Government Documents Department
Review and investigation of unsatisfactory control characteristics involving instability of pilot-airplane combination and methods for predicting these difficulties from ground tests

Review and investigation of unsatisfactory control characteristics involving instability of pilot-airplane combination and methods for predicting these difficulties from ground tests

Date: August 1, 1957
Creator: Phillips, William H; Brown, B Porter & Matthews, James T , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Review of an Investigation of Ceramic Coatings for Metallic Turbine Parts and Other High-Temperature Applications

Review of an Investigation of Ceramic Coatings for Metallic Turbine Parts and Other High-Temperature Applications

Date: March 1, 1947
Creator: Harrison, W N; Moore, D G & Richmond, J C
Description: No abstract available.
Contributing Partner: UNT Libraries Government Documents Department
A review of boundary-layer literature

A review of boundary-layer literature

Date: July 1, 1947
Creator: Tetervin, Neal
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Review of current and anticipated lubricant problems in turbojet engines

Review of current and anticipated lubricant problems in turbojet engines

Date: April 20, 1951
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A Review of Degradation Behavior of Container Materials for Disposal of High-Level Nuclear Waste in Tuff and Alternative Repository Environments

A Review of Degradation Behavior of Container Materials for Disposal of High-Level Nuclear Waste in Tuff and Alternative Repository Environments

Date: June 1989
Creator: Maiya, P. S.
Description: Corrosion resistance of materials in aqueous systems is reviewed from the perspective of their suitability as container materials for nuclear waste. A discussion of the chemistry and characterization of repository environments, namely, tuff and alternative environments (shale, limestone, and carbonate), is followed by a description of corrosion mechanisms. In this review, emphasis is placed on localized corrosion (e.g., stress corrosion cracking, crevice corrosion, and pitting) because localized corrosion is difficult to account for in design of components, but it is the life-limiting factor for many metallic and nonmetallic systems.
Contributing Partner: UNT Libraries Government Documents Department
A Review of Dynamic Characteristics of Magnetically Levitated Vehicle Systems

A Review of Dynamic Characteristics of Magnetically Levitated Vehicle Systems

Date: November 1995
Creator: Cai, Y. & Chen, Shoei-Sheng
Description: The dynamic response of magnetically levitated (maglev) ground transportation systems has important consequences for safety and ride quality, guideway design, and system costs. Ride quality is determined by vehicle response and by environmental factors such as humidity and noise. The dynamic response of the vehicles is the key element in determining ride quality, while vehicle stability is an important safety-related element. To design a guideway that provides acceptable ride quality in the stable region, vehicle dynamics must be understood. Furthermore, the trade-off between guideway smoothness and levitation and control systems must be considered if maglev systems are to be economically feasible. The link between the guideway and the other maglev components is vehicle dynamics. For a commercial maglev system, vehicle dynamics must be analyzed and tested in detail. This report, which reviews various aspects of the dynamic characteristics, experiments and analysis, and design guidelines for maglev systems, discusses vehicle stability, motion dependent magnetic force components, guideway characteristics, vehicle/ guideway interaction, ride quality, suspension control laws, aerodynamic loads and other excitations, and research needs.
Contributing Partner: UNT Libraries Government Documents Department
Review of Experimental Investigations of Liquid-Metal Heat Transfer

Review of Experimental Investigations of Liquid-Metal Heat Transfer

Date: March 1, 1955
Creator: Lubarsky, Bernard & Kaufman, Samuel J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Review of experimental investigations of liquid-metal heat transfer

Review of experimental investigations of liquid-metal heat transfer

Date: January 1, 1956
Creator: Lubarsky, Bernard & Kaufman, Samuel J
Description: Experimental data of various investigators of liquid-metal heat-transfer characteristics were reevaluated using as consistent assumptions and methods as possible and then compared with each other and with theoretical results. The reevaluated data for both local fully developed and average Nusselt numbers in the turbulent flow region were found still to have considerable spread, with the bulk of the data being lower than predicted by existing analysis. An equation based on empirical grounds which represents most of the fully developed heat-transfer data is nu = 0.625 pe(0.4) where nu represents the Nusselt number and pe the Peclet number. The theoretical prediction of the heat transfer in the entrance region was found to give lower values, in most cases, than those found in the experimental work.
Contributing Partner: UNT Libraries Government Documents Department
Review of flight tests of NACA C and D cowlings on the XP-42 airplane

Review of flight tests of NACA C and D cowlings on the XP-42 airplane

Date: January 1, 1943
Creator: Johnston, J Ford
Description: Results of flight tests of the performance and cooling characteristics of three NACA D cowlings and of a conventional NACA D cowling on the XP-42 airplane are summarized and compared. The D cowling is, in general, characterized by the use of an annular inlet and diffuser section for the engine-cooling air. The D cowlings tested were a long-nose high-inlet-velocity cowling, a short-nose high-inlet-velocity cowling, and a short-nose low inlet-velocity cowling. The use of wide-chord propeller cuffs or an axial-flow fan with the D cowlings increased the cooling pressure recoveries in the climb condition at the expense of some of the improvement in speed.
Contributing Partner: UNT Libraries Government Documents Department