UNT Libraries Government Documents Department - 37 Matching Results

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Aerodynamic Characteristics at High and Low Subsonic Mach Numbers of the NACA 0012, 64₂-015, and 64₃-018 Airfoil Sections at Angles of Attack from -2 Degrees to 30 Degrees

Description: An investigation has been made in the Langley low-turbulence pressure tunnel of the aerodynamic characteristics of the NACA 0012, 64(sub 2)-015, and 64(sub 3)-018 airfoil sections. Data were obtained at Mach numbers from 0.3 to that for tunnel choke, at angles of attack from -2deg to 30deg, and with the surface. of each airfoil smooth-and with roughness applied at the leading edge.The Reynolds numbers of the tests ranged from 0.8 x 10(exp 6) to 4.4 x 10(exp 6). The results are presented as vari… more
Date: July 23, 1954
Creator: Critzos, Chris C.
Item Type: Refine your search to only Report
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Chemical Properties of Elements 99 and 100

Description: A description of some of the chemical properties and of the methods used in the separations of elements 99 and 100 is given. The new elements exhibit the properties expected for the tenth and eleventh actinide elements. Attempts to produce an oxidation state greater than 111 of element 99 have been successful. In normal aqueous media only the 111 state of element 100 appears to exist. The relative spacings of the elution peaks of the new elements in some separations with ion exchange resin colu… more
Date: July 23, 1954
Creator: Thompson, S. G.; Harvey, B. G.; Choppin, G. R. & Seaborg, G. T.
Item Type: Refine your search to only Report
open access

A comparison of the longitudinal aerodynamic characteristics at Mach numbers up to 0.94 of swept back wings having NACA 4-digit or NACA 64A thickness distributions

Description: Report presenting a wind-tunnel investigation on two series of twisted and cambered wings, which were identical except for wing section, to compare the effects of NACA 4-digit and NACA 64A chordwise distributions of thickness on the longitudinal aerodynamic characteristics of the wings. Results regarding the low-speed results, high-speed results, and flow studies are provided.
Date: August 23, 1954
Creator: Sutton, Fred B. & Dickson, Jerald K.
Item Type: Refine your search to only Report
open access

Effect on the low-speed aerodynamic characteristics of a 49 degree sweptback wing having an aspect ratio of 3.78 of blowing air over the trailing-edge flap and aileron

Description: Report presenting an investigation in the full-scale tunnel to determine the effects on the aerodynamic characteristics of a 49.1 degree sweptback wing of blowing a high-energy stream of air over a trailing-edge flap and an aileron. The results indicated that significant increases in lift coefficient and an improvement in aileron effectiveness may be obtained by the blowing method of boundary-layer control.
Date: April 23, 1954
Creator: Whittle, Edward F., Jr. & Lipson, Stanley
Item Type: Refine your search to only Report
open access

Effects of Operating Propellers on the Wing-Surface Pressures of a Four-Engine Tractor Airplane Configuration Having a Wing with 40 Degrees of Sweepback

Description: Memorandum presenting an investigation to evaluate the effects of operating propellers and of nacelles on the wing-surface pressures on a semispan model of a four-engine tractor airplane configuration with a 40 degree sweptback wing and aspect ratio of 10. Results regarding the effects of the nacelles with the propellers off, effects of flaps, and effects of operating propellers are provided.
Date: April 23, 1954
Creator: Kolbe, Carl D. & Boltz, Frederick W.
Item Type: Refine your search to only Report
open access

Effects of Resin Coating Methods and Other Variables on Physical Properties of Glass-Fabric Reinforced Polyesters

Description: Memorandum presenting the effects of resin coating methods on some physical properties of laminates prepared with glass fabric, Fiberglas 181, and bonded with two commercial polyester resins. The resins used were Laminac 4126 and Selectron 5003. The resin coating methods used were roller coating, application of a dilute solution of resin, resin immersion, application of monomeric styrene, and vacuum impregnation.
Date: August 23, 1954
Creator: Axilrod, B. M.; Wier, J. E. & Mandel, J.
Item Type: Refine your search to only Report
open access

Evaluation of Methods of Brazing Aluminum Spacing Fins to Flat-Plate Aluminum-Clad Fuel Elements

Description: Abstract: "Four brazing methods and one other joining process were evaluated for the joining of aluminum spacer fins to flat-plate aluminum-clad fuel elements. None of these methods appear completely suitable for use in a mass-production operation. Furnace brazing and salt-bath brazing were most promising. However, the mechanical problems involved in the application of either process deter their recommendation. Resistance brazing and torch-brazing were proven impractical. The great difference i… more
Date: July 23, 1954
Creator: Evans, R. M. & Martin, D. C.
Item Type: Refine your search to only Report
open access

Experimental Investigation of the Aerodynamic Characteristics of a Ballistic-Type Missile

Description: Memorandum presenting lift, drag, and pitching-moment coefficients of a ballistic-type missile configuration as determined from tests in the 10- by 14-inch supersonic wind tunnel at a range of Mach numbers and angles of attack. Pressure distributions and drag coefficients were also determined at 0 degrees angle of attack.
Date: April 23, 1954
Creator: Neice, Stanford E.
Item Type: Refine your search to only Report
open access

Flight investigation of the effects of a partial-span leading-edge chord extension on the aerodynamic characteristics of a 35 degree swept-wing fighter airplane

Description: Report presenting a flight investigation to evaluate the effects of a partial-span, 15-percent-chord, leading-edge extension on the aerodynamic characteristics of the F-86A airplane. Results regarding the longitudinal stability, low-speed stalls, drag, and pilot reports are provided.
Date: April 23, 1954
Creator: Matteson, Frederick H. & Van Dyke, Rudolph D., Jr.
Item Type: Refine your search to only Report
open access

Freezing of Ice Plugs in Process Lines of the HRT

Description: The following report studies a method of freezing ice plugs in pipe lines before flanges are disconnected, the intention is to prevent light water from entering the system when equipment is removed for repairs.
Date: April 23, 1954
Creator: Reynolds, Albert B.; Buchanan, J. R., Jr.; Lueders, R. E. & Stewart, W. A.
Item Type: Refine your search to only Report
open access

Hanford Atomic Products Operation monthly report, February 1954

Description: This is a progress report of the production reactors on the Hanford Reservation for the month of February 1951. This report takes each division (e.g., manufacturing, medical, accounting, occupational safety, security, reactor operations, etc.) of the site and summarizes its accomplishments and employee relations for that month.
Date: March 23, 1954
Creator: McCune, F. K.
Item Type: Refine your search to only Report
open access

Hanford Atomic Products Operation monthly report, March 1954

Description: This document presents a summary of work and progress at the Hanford Engineer Works for March 1954. The report is divided into sections by department. A plant wide general summary is included at the beginning of the report, after which the departmental summaries begin. The Manufacturing Department reports plant statistics, and summaries for the Metal Preparation, Reactor and Separation sections. The Engineering Department`s section summaries work for the Technical, Design, and Project Sections.… more
Date: April 23, 1954
Item Type: Refine your search to only Report
open access

Investigation of the Jet Effects on a Flat Surface Downstream of the Exit of a Simulated Turbojet Nacelle at a Free-Stream Mach Number of 2.02

Description: "An investigation at a free-stream Mach number of 2.02 was made to determine the effects of a propulsive jet on a wing surface located in the vicinity of a choked convergent nozzle. Static-pressure surveys were made on a flat surface that was located in the vicinity of the propulsive jet. The nozzle was operated over a range of exit pressure ratios at different fixed vertical distances from the flat surface. Within the scope of this investigation, it was found that shock waves, formed in the ex… more
Date: June 23, 1954
Creator: Bressette, Walter E.
Item Type: Refine your search to only Report
open access

Investigation of the Normal Force Accompanying Thrust-Axis Inclination of the NACA 1.167-(0)(03)-058 and the NACA 1.167-(0)(05)-058 Three-Blade Propellers at Forward Mach Numbers to 0.90

Description: Report presenting an investigation to determine the normal force of two three-blade NACA propellers and the agreement of the measured normal force with a theoretical method. Propeller thrust and normal force were measured for a variety of blade angles, angles of attack, and Mach numbers. Results regarding variation with thrust, effect of inclination, and a comparison with theory are provided.
Date: June 23, 1954
Creator: Demele, Fred A. & Otey, William R.
Item Type: Refine your search to only Report
open access

Low-Speed Longitudinal Stability and Lateral-Control Characteristics of a 0.3-Scale Model of the Republic RF-84F Airplane at a Reynolds Number of 9x10(exp 6)

Description: From Summary: "An investigation was conducted in the Langley 19-foot pressure tunnel on a 0.3-scale model of the Republic RF-84F airplane to determine modifications which would eliminate the pitch-up that occurred near maximum lift during flight tests of the airplane. The effects of high-lift and stall-control devices, horizontal tail locations, external stores, and various inlets on the longitudinal characteristics of the model were investigated. For the most part, these tests were conducted a… more
Date: February 23, 1954
Creator: Bollech, Thomas V. & Kelly, H. Neale
Item Type: Refine your search to only Report
open access

MEETING XIII -- BEVATRON RESEARCH CONFERENCE -- TARGET AREA MODIFICATIONS

Description: The following modifications are planned to facilitate greater usefulness of available target space in the west tangent tank: (1) A 3/32-inch x 6-inch x 106-inch aluminum window is to be added to the outer radius tank wall. (2) One 12-inch x 6-inch air lock is to be added on the inside centerline of the reentrant section on the west tangent tank. (3) Two 24-inch x 30-inch openings are to be cut on the beam centerline in the top of the west tangent tank, one at each end. These openings will accom… more
Date: March 23, 1954
Creator: Chupp, Warren
Item Type: Refine your search to only Report
open access

Methods for obtaining desired helicopter stability characteristics

Description: A brief summary is made of methods available to the helicopter designer for obtaining desired stability characteristics by modifications to the airframe design. The discussion is based on modifications made during the establishment of flying-qualities criteria and includes sample indications of theoretical studies of additional methods.
Date: August 23, 1954
Creator: Gustafson, F. B. & Tapscott, Robert J.
Item Type: Refine your search to only Report
open access

Note on the Effects of First-Order Aerodynamic Loads on Propeller Shaft Loads with Emphasis on Counterrotating Propellers

Description: An investigation of the 1XP excitation of inclined single-rotation propellers has indicated a new concept for determining propeller shaft forces and moments of an inclined propeller. This report presents preliminary results, in particular to the counterrotating propeller.
Date: April 23, 1954
Creator: Rogallo, Vernon L.; McCloud, John L., III & Yaggy, Paul F.
Item Type: Refine your search to only Report
open access

An Orifice Plate Pulse Column for Liquid-Liquid Extraction

Description: A study was made of the performance of an orifice plate pulse column which is essentially a spray column containing internal constrictions in the form of orifices. The chemical system studied was acetic acid-waterhexone, and the variables considered were pulse frequency, throughput, phase continuity, and direction of solute transfer. For comparison purposes, several runs were made with a conventional spray column. Curves are presented showing the effect of the column variables on the column eff… more
Date: August 23, 1954
Creator: O'Brien, D. C.
Item Type: Refine your search to only Thesis or Dissertation
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