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LEVSEEP: Analysis Software for Levee Underseepage and Rehabilitation

Description: This report uses the computer software LEVSEEP to describe analysis methodology for levee underseepage analyses and rehabilitation. Information required for data input, calculation procedures, output, and graphics is presented. In addition, comprehensive results of case studies and parameter analyses utilizing LEVSEEP are included.
Date: July 1995
Creator: Brizendine, Anthony L.; Taylor, Hugh M., Jr. & Gabr, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Li-Alloy/FeS Cell Design and Analysis Report

Description: This report contains historical information on the Li-alloy/FeS system that will be useful in its future applications. This document includes the following: (1) the chemical and electrochemical reactions for the Li-alloy/FeS system, accomplishments in past cell development efforts, and performance attained by state-of-the-art cells vs performance goals; (2) detailed drawings of state-of-the-art cell designs, documentation of cell fabrication techniques, and comparisons of alternative types of c… more
Date: July 1985
Creator: Gay, E. C.; Steunenberg, Robert K.; Miller, W. E.; Battles, J. E.; Kaun, T. D.; Martino, F. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Li⁶ and Li⁷ (n. 2n) Cross Sections at 14.1 Mev

Description: Abstract: "An absolute measurement of the 14.1-Mev (n, 2n) cross sections of Li-6 and Li-7 has been made using the large scintillator technique, resulting in cross sections in barns of 0.070 +/- 0.006 and 0.056 +/- 0.005 for Li-6 and Li-7, respectively."
Date: May 29, 1958
Creator: Ashby, V. J.; Catron, H. C.; Newkirk, Lester L.; Taylor, C. J. & Williamson, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life-Cycle Costing: A Guide for Selecting Energy Conservation Projects for Public Buildings

Description: Report issued by the Bureau of Standards discussing the energy conservation of public buildings. As stated in the introduction, "this report focuses on the establishment of a technically correct, practical, standardized approach for evaluating proposed energy conservation improvements in public buildings" (p. 2). This report includes tables, illustrations, and photographs.
Date: September 1978
Creator: Ruegg, Rosalie T.; McConnaughey, John S.; Sav, G. Thomas & Hockenbery, Kimberly A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life of Van Stone Corrective Measures

Description: This report is a document summarizing all information available on life aspects of various measures proposed to reduce or eliminate corrosion of Van Stone flanger.
Date: September 12, 1949
Creator: Botsford, C. W. & Eschbach, E. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life Tests of Tungsten and Tantalum Filaments in Ion Gauges

Description: Results of an investigation carried on for the following purposes: (1) To determine the relative life of filaments when operated at low emission (low temperatures) as compared to those operated at high emission values. (2) To determine the nature of the dependence of life upon the initial diameter of the filament. (3) To determine the effect of varying concentrations of water vapor and air upon the life of the filaments. (4) To determine the relative life characteristics of tantalum as compare… more
Date: August 9, 1949
Creator: Bush, W. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life Zone Investigations in Wyoming

Description: Characterizes five transcontinental life zones in Wyoming; defines their extent and limits; lists mammal, breeding bird, reptile, amphibian, and plant species; and provides notes on distribution and abundance of trees observed during the survey.
Date: October 3, 1917
Creator: Cary, Merritt
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Life Zones and Crop Zones of New Mexico

Description: Discusses geography, climate, agricultural practices, and crops of each life zone in New Mexico. Provides mammal, breeding bird, reptile, amphibian, and plant species list for each zone. Includes a life zone map.
Date: September 5, 1913
Creator: Bailey, Vernon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and center of pressure of wing-body-tail combinations at subsonic, transonic, and supersonic speeds

Description: From Summary: "A method is presented for calculating the lift and centers of pressure of wing-body and wing-body-tail combinations at subsonic, transonic, and supersonic speeds. A set of design charts and a computing table are presented which reduce the computations to routine operations. Comparison between the estimated and experimental characteristics for a number of wing-body and wing-body-tail combinations shows correlation to within + or - 10 percent on lift and to within about + or - 0.02… more
Date: July 8, 1953
Creator: Pitts, William C.; Nielsen, Jack N. & Kaattari, George E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and drag characteristics and gliding performance of an autogiro as determined in flight

Description: From Summary: "This report presents the results of flight test of the Pitcairn "PCA-2" autogiro. Lift and drag coefficients with the propeller stopped have been determined over approximately a 90 degree range of angles of attack. Based on the sum of fixed-wing and swept-disk areas, the maximum lift coefficient is 0.895, the minimum drag coefficient with propeller stopped is 0.015, and the maximum l/d with propeller stopped is 4.8. Lift coefficients were found also with the propeller delivering … more
Date: May 2, 1932
Creator: Wheatley, John B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and drag characteristics of a cabin monoplane determined in flight

Description: From Summary: "The results of flight tests conducted by the NACA to determine the lift and drag characteristics of a full-scale airplane are given herein. A Fairchild FC-2W2 cabin monoplane having a Gottingen 387 wing section was used for the tests. The maximum lift coefficient for the airplane is compared with that obtained for the Gottingen 387 airfoil in recent tests in the Variable Density Tunnel. The maximum lift coefficient for the airplane was found to be 1.50 and that for the airfoil 1.… more
Date: January 1931
Creator: Thompson, F. L. & Keister, P. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag Characteristics of a Low-Drag Airfoil With Slotted Flap Submitted by Curtiss-Wright Corporation

Description: Report presenting a wooden model equipped with a slotted flap that was tested in the two-dimensional tunnel. It represented a wing section of the Curtiss-Wright P-60A airplane and the NACA 66,2-118 section. Results regarding lift characteristics, drag coefficients, and flap deflection characteristics are provided.
Date: December 1941
Creator: Abbott, Ira H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag Characteristics of the Bell X-5 Research Airplane at 59 Degrees Sweepback for Mach Numbers from 0.60 to 1.03

Description: Report presenting an investigation of the flight characteristics of the Bell X-5 research airplane with sweepback that can be varied from 20 degrees to 59 degrees in flight. Lift and drag data have been obtained for the 59 degree sweep configuration for a range of Mach numbers and from zero to almost maximum lift.
Date: February 17, 1953
Creator: Bellman, Donald R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag Characteristics of the Douglas D-558-II Research Airplane Obtained in Exploratory Flights to a Mach Number of 2.0

Description: Report presenting a flight investigation of the 35 degree swept-wing D-558-II rocket-powered research airplane in the transonic and supersonic speed ranges. Lift and drag values obtained in exploratory flights of the basic configuration are presented.
Date: August 4, 1954
Creator: Nugent, Jack
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and drag characteristics of the Douglas X-3 research airplane obtained during demonstration flights to a Mach number of 1.20

Description: Report presenting lift and drag data obtained during the Douglas X-3 airplane. The data covered the Mach number range from 0.82 to 1.20 with considerable variation in lift. A comparison of the flight data with data from wind-tunnel and rocket-model tests shows that the model tests adequately predict the performance of the airplane.
Date: December 6, 1954
Creator: Bellman, Donald R. & Murphy, Edward D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and drag coefficients for the Bell X-1 airplane (8-percent-thick wing) in power-off transonic flight

Description: Report presenting drag coefficients determined by the accelerometer method for the Bell X-1 airplane with 8-percent-thick wing and 6-percent-thick tail in power-off flight over a range of Mach numbers and lift coefficients. Results regarding the variation of computed lift and drag coefficients, variation of lift coefficient with Mach number, and effect of Mach number on lift-drag ratio are provided.
Date: June 25, 1951
Creator: Carman, L. Robert & Carden, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and drag data for 30 pusher-propeller shaft housings on an NACA 65,3-018 airfoil section

Description: Report presenting tests in the two-dimensional low-turbulence pressure tunnel to study the interference effects of various pusher-propeller shaft-housing combinations on a low-drag airfoil. Thirty different combinations were tested, variations being made in shaft size, shape, angle, and fillet.
Date: November 1943
Creator: Abbott, Frank T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag Effects of Wing-Tip Rake

Description: This report deals with a description and report of tests carried out at the Washington Navy Yard on models of the RAF-6, albatross and Slone airfoils to determine the effectiveness of the conventional wing-trailing edge being always longer than the leading edge. The results are compared with the values computed by standard formulae in use at the time the tests were conducted.
Date: 1923
Creator: Zahm, A. F.; Bear, R. M. & Hill, G. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag of the Bell X-5 Research Airplane in the 45 Degree Sweptback Configuration at Transonic Speeds

Description: Memorandum presenting a flight investigation of the Bell X-5 variable-sweep research airplane in the 45 degree wing sweptback configuration over a range of Mach numbers. Lift and drag values are presented and a comparison is made with data obtained with a wing sweepback of 59 degrees.
Date: July 11, 1956
Creator: Nugent, Jack
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag of Wings with Small Span

Description: The lift coefficient of a wing of small span at first shows a linear increase for the increasing angle of attack, but to a lesser degree then was to be expected according to the theory of the lifting line; thereafter the lift coefficient increases more rapidly than linearity, as contrasted with the the theory of the lifting line. The induced drag coefficient for a given lift coefficient, on the other hand, is obviously much smaller than it would be according to the theory. A mall change in the … more
Date: August 1947
Creator: Weinig, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and Drag Tests of Three Airfoil Models With Fowler Flaps Submitted by Consolidated Aircraft Corporation

Description: Report presenting lift and drag tests made in the two-dimensional tunnel of three airfoil models. The models represented intermediate sections on alternative wings of the XB-32 airplane and were equipped with 0.30 Fowler flaps. Results regarding the Davis model, the C.A.C. model, and low-drag model are provided.
Date: December 1941
Creator: Abbott, Ira H. & Turner, Harold R., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lift and moment characteristics at subsonic Mach numbers of four 10-percent-thick airfoil sections of varying trailing-edge thickness

Description: Report presenting the results of a wind-tunnel investigation of the lift and moment characteristics of four 10-percent-thick circular-arc airfoil sections. Increases in the trailing-edge thickness were found to result in increases in maximum lift coefficient and lift-curve slope at all Mach numbers as well as increases in lift-divergence Mach number at all lift coefficients.
Date: December 20, 1950
Creator: Summers, James L. & Page, William A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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