5,210 Matching Results

Search Results

Advanced search parameters have been applied.

Distribution and Trend of Nitrate, Chloride, and Total Solids in Water in the Magothy Aquifer in Southeast Nassau County, New York, from the 1950's Through 1973

Description: Abstract: Concentrations of nitrate, chloride, and total sol ids in water in the Magothy aquifer, southeast Nassau County, N.Y., show a steadily increasing trend from the early 1950's to 1973. Vertical distribution of nitrate, chloride, and total-solids concentrations as shown in sections of the study area indicate downward movement of these constituents. Maximum concentrations are in a zone underlying the areas of Westbury, Hicksvil.le, and Plainview. Nitrate (as nitrogen) concentration increased from 4-5 milligrams per liter to 7 milligrams per liter in the area of Westbury and from 3 to 10 milligrams per liter in Plainview during the period 1950-73. During this same period, a 10 milligram-per-liter line of equal-chloride concentration on a cross section in the Westbury area moved downward a distance of less than 50 feet (15 meters), and in the area of Hicksville nearly 150 feet (45 meters). Total-solids concentration doubled in the area of Plainview, where maximum downward movement of pollutants was observed.
Date: August 1976
Creator: Ku, Henry F. H. & Sulam, Dennis J.
Partner: UNT Libraries Government Documents Department

Buffeting of External Fuel Tanks at High Speeds on a Gruman F7F-3 Airplane

Description: Attempts were made to alleviate the buffeting of external fuel tanks mounted under the wings of a twin-engine Navy fighter airplane. The Mach number at which buffeting began was increased from 0,529 to 0.640 by streamlining the sway braces and by increasing the lateral rigidity of the sway brace system. Further increase of the Mach number, at which buffeting began to 0.725, was obtained by moving the external fuel tank to a position under the fuselage.
Date: January 29, 1947
Creator: Turner, Howard L.
Partner: UNT Libraries Government Documents Department

Effective moment of inertia of fluid in offset, inclined, and swept-wing tanks undergoing pitching oscillations

Description: Report presenting fluid-dynamics studies of simplified model fuel tanks mounted on a mechanism that simulated a wing undergoing torsional oscillations. The tanks were mounted in several configurations and the effective moment of inertia of the fluid was determined experimentally. Results regarding the effect of frequency, pylon-mounted tanks, centrally mounted tanks, and effect of a diffused baffle on the damping factor are provided.
Date: January 1955
Creator: Reese, James R. & Sewall, John L.
Partner: UNT Libraries Government Documents Department

Effect of wing-tank location on the drag and trim of a swept-wing model as measured in flight at transonic speeds

Description: Report presenting results of an exploratory free-flight investigation at zero lift of several rocket-powered drag research models equipped wing wing tanks at a range of Mach numbers. The tanks, which were slender bodies of revolution, were mounted on 34 degrees sweptback, nontapered wings of 2.7 aspect ratio. Results regarding drag and trim change are provided.
Date: April 4, 1950
Creator: Welsh, Clement J. & Morrow, John D.
Partner: UNT Libraries Government Documents Department

Effect of airfoil section and tip tanks on the aerodynamic characteristics at high subsonic speeds of an unswept wing of aspect ratio 5.16 and taper ratio 0.61

Description: Report presenting an investigation of the effect of two wing sections and a tip tank on the aerodynamic characteristics of a rigid unswept wing in the high-speed tunnel over a Mach number range of 0.60 to 0.90. Results regarding the effect of original airfoil sections, effect of modifications to Section B, effect of tip tank, and characteristics of the tip tank in the presence of the wing are provided.
Date: December 1, 1949
Creator: Silvers, H. Norman & Spreeman, Kenneth P.
Partner: UNT Libraries Government Documents Department

The effects of centrally mounted wing-tip tanks on the subsonic aerodynamic characteristics of a wing of aspect ratio 10 with 35 degrees of sweepback

Description: Report presenting an investigation of the effects of three centrally mounted wing-tip tanks on the aerodynamic characteristics of a cambered wing with an aspect ratio of 10 and 35 degrees of sweepback. Testing occurred over a range of Mach and Reynolds numbers and lift, drag, and pitching-moment were measured.
Date: February 21, 1951
Creator: Tinling, Bruce E. & Kolk, W. Richard
Partner: UNT Libraries Government Documents Department

Wind-tunnel investigation at subsonic and supersonic speeds of a model of a tailless fighter airplane employing a low-aspect-ratio swept-back wing : effects of external fuel tanks and rocket packets on the drag characteristics

Description: Report presenting the effect of external fuel tanks and externally mounted rocket packets on the drag characteristics of a model of a tailless fighter airplane. Lift, drag, pitching-moment, and rolling-moment coefficients and lift-drag ratios are presented in tabular form and the drag characteristics and lift-drag ratios are also presented in graphic form.
Date: January 12, 1953
Creator: Smith, Willard G.
Partner: UNT Libraries Government Documents Department

Wind-Tunnel Tests of Several Arrangements of External Auxiliary Fuel Tanks on a Fighter-Type Airplane

Description: Report presenting an investigation conducted in the 19-foot pressure tunnel to determine the aerodynamic effects of several arrangements of external auxiliary fuselage and wing tanks of large fuel capacity on a fighter-type airplane. The rectangular tank arrangement of 350-gallon fuel capacity has the greatest adverse aerodynamic effect on the airplane and is the least desirable of all the configurations tested.
Date: August 1942
Creator: Pepper, Edward
Partner: UNT Libraries Government Documents Department

Functions and Requirements for the DST Knuckle Region Ultrasonic Scanning System

Description: This document defines the functions and requirements for a ultrasonic scanning system to provide an examination of the knuckle region of Hanford's double shell waste tanks, This document provides the basis for the ultrasonic concept selection, design, fabrication, and deployment methodology.
Date: January 29, 2001
Creator: Pardini, Allan F. & Samuel, Todd J.
Partner: UNT Libraries Government Documents Department

The effect of tip tanks on the rolling characteristics at high subsonic Mach numbers of a wing having an aspect ratio of 3 with quarter-chord line swept back 35 degrees

Description: Report presenting an investigation of the effect of wing-tip mounted tanks on the rolling characteristics of a wing, aspect ratio 3 with the quarter-chord line swept back 35 degrees, through a range of Mach numbers and angles of attack using the free-roll method.
Date: January 17, 1950
Creator: Kuhn, Richard E. & Myers, Boyd C., II
Partner: UNT Libraries Government Documents Department

Supporting document for the historical tank content estimate for AN-tank farm

Description: This Supporting Document provides historical in-depth characterization information on AN-Tank Farm, such as historical waste transfer and level data, tank physical information, temperature plots, liquid observation well plots, chemical analyte and radionuclide inventories for the Historical Tank Content Estimate Report for the Southeast Quadrant of the Hanford 200 Areas.
Date: March 6, 1997
Creator: Brevick, C.H.; Stroup, J.L. & Funk, J.W., Fluor Daniel Hanford
Partner: UNT Libraries Government Documents Department

Tank 241-AP-106, grab samples, 6AP-96-1 through 6AP-96-3 analytical results for the final report

Description: This document is the final report for tank 241-AP-106 grab samples. This document presents the analytical results for three samples (6AP-96-1, 6AP-96-2 and 6AP-96-3) taken from riser 1 @ 150{degrees} of tank 241-AP-1 06 on September 12, 1996. Analyses were performed in accordance with the Compatibility Grab Sampling and Analysis Plan (TSAP) (Sasaki, 1996) and the Data Quality Objectives for Tank Farms Waste Compatibility Program (DQO) (Fowler, 1995).
Date: December 11, 1996
Creator: Esch, R.A., Westinghouse Hanford
Partner: UNT Libraries Government Documents Department

Project W-320 tank 241-C-106 sluicing acceptance for beneficial use

Description: The purpose of this document is to identify the Project W- 320 documentation required to be turned over from the Projects organization to Tank Farm Operations as part of the acceptance of the new systems for beneficial use. The assigned responsibility for completion of each item is listed on the Acceptance for Beneficial Use (ABU) in Appendix A in this document.
Date: October 31, 1996
Creator: Symons, G.A.
Partner: UNT Libraries Government Documents Department

The prevention of ice formation on gasoline tank vents

Description: "This investigation was conducted in the refrigerated wind tunnel at the Langley Memorial Aeronautical Laboratory, Langley Field, Va., to determine a suitable method for preventing the formation of ice on the vents of airplane gasoline tanks. Tests were made on a variety of vent forms arranged in a number of different orientations relative to the direction of the air stream. Both the size of the tube and its orientation were found to be of great importance. Small tubes, under equal circumstances, were found to freeze over far more rapidly than large ones" (p. 1).
Date: October 1931
Creator: Theodorsen, Theodore & Clay, William C.
Partner: UNT Libraries Government Documents Department

Wind-tunnel investigation of the effect of wing-tip fuel tanks on characteristics of unswept wings in steady roll

Description: Report presenting testing to determine the effects of wing-tip fuel tanks on the rolling characteristics of unswept wings. The investigation included determination of the damping in roll, aileron effectiveness, and lateral maneuverability of a tapered and of a rectangular wing. Results regarding the effect of wing-tip fuel tanks on the damping-moment coefficient in roll and origin of the effect of wing-tip fuel tanks are also provided.
Date: June 1947
Creator: Murray, Harry E. & Wells, Evalyn G.
Partner: UNT Libraries Government Documents Department

The calculation of certain static aeroelastic phenomena of wings with tip tanks or boom-mounted lifting surfaces

Description: Report presenting the use of the matrix-integration method for calculating static aeroelastic phenomena on a wing with concentrated aerodynamic forces at the tip due to tip tanks or boom-mounted lifting surfaces. The results indicate that the presence of a tip tank on an unswept wing tends to deteriorate its static aeroelastic characteristics and that a lift surface geared to the aileron and mounted on a boom ahead of the tip may improve the static aeroelastic characteristics to warrant consideration of a vane as a device for relieving adverse aeroelastic effects.
Date: August 27, 1952
Creator: Diederich, Franklin W. & Foss, Kenneth A.
Partner: UNT Libraries Government Documents Department

Preliminary investigation of the effects of external wing fuel tanks on ditching behavior of a sweptback-wing airplane

Description: Report presenting an experimental investigation using a model of a typical sweptback-wing airplane equipped with external wing fuel tanks to determine the effects of the tanks on the ditching behavior. Tanks of various fuel capacity and several shape modifications were used. Results regarding the basic model and original 206-gallon tanks, 450-gallon tanks, 260-gallon tanks, and general effects observed are provided.
Date: July 1956
Creator: McBride, Ellis E.
Partner: UNT Libraries Government Documents Department

Effects of External Fuel Tanks and Bombs on Critical Speeds of Aircraft

Description: "The danger of shocks and separation in high-speed flight due to the presence of externally carried fuel tanks and bombs is pointed out, and a rough analysis of the phenomena involved is attempted. A discussion is given of the application and limitations of the superposition methods for calculating local velocities in the region between the wing and the external stores, and for predicting critical Mach numbers. Some suggestions for improved designs are also presented" (p. 1).
Date: February 1946
Creator: Katzoff, S.
Partner: UNT Libraries Government Documents Department

Effect of Protruding Gasoline Tanks Upon the Characteristics of an Airfoil

Description: Note presenting an investigation to determine the effect of a gasoline tank protruding from the center section of a wing on the aerodynamic characteristics of the wing. The results are presented in the form of polar curves, curves of D/L against lift coefficient, and the curves of lift and drag coefficient against the angle of attack.
Date: October 1926
Creator: Jacobs, Eastman N.
Partner: UNT Libraries Government Documents Department

The Enlarged N.A.C.A. Tank, and Some of Its Work

Description: The most conspicuous of the features of the enlarged N.A.C.A. tank are derived directly from those of the original tank and owe their present form not only to the reasons for their first use but also to the experience obtained with them. As in the original tank, there are: 1) A basin of great length (new 2,880 feet); 2) Rails made of structural H beams, without machining; 3) A towing carriage of very high speed (now 80 mph maximum); 4) Rubber tires on all the wheels, pneumatic on the running wheels and solid on the guide wheels.
Date: November 1939
Creator: Truscott, Starr
Partner: UNT Libraries Government Documents Department