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Effect of aspect ratio on the air forces and moments of harmonically oscillating thin rectangular wings in supersonic potential flow
This report treats the effect of aspect ratio on the air forces and moments of an oscillating flat rectangular wing in supersonic potential flow. The linearized velocity potential for the wing undergoing sinusoidal torsional oscillations simultaneously with sinusoidal vertical translations is derived in the form of a power series in terms of a frequency parameter. The series development is such that the differential equation for the velocity potential is satisfied to the required power of the frequency parameter considered and the linear boundary conditions are satisfied exactly. The method of solution can be utilized for other plan forms, that is, plan forms for which certain steady-state solutions are known.
Date:
January 6, 1950
Creator:
Watkins, Charles E.
Object Type:
Report
System:
The UNT Digital Library
Measurements of Aerodynamic Characteristics of a 35 Degree Sweptback NACA 65-009 Airfoil Model With 1/4-Chord Bevelled-Trailing-Edge Flap and Trim Tab by the NACA Wing-Flow Method
The third investigation in a series to determine the fundamental characteristics of trailing-edge controls at transonic speeds. This particular report uses a 35 degree sweptback untapered airfoil model with an aspect ratio of 3 and a flap with a bevelled trailing edge with a trailing-edge angle of 23 degrees. Results regarding lift, pitching-moment, and hinge-moment characteristics are provided.
Date:
January 6, 1950
Creator:
Johnson, Harold I. & Brown, B. Porter
Object Type:
Report
System:
The UNT Digital Library
Investigation of the NACA 4-(4)(06)-057-45a and NACA 4-(4)(06)-57-45b Two-Blade Swept Propellers at Forward Mach Numbers to 0.925
Report presenting an investigation of the NACA 4-(4)(06)-057-45A and NACA 4-(4)(06)-057-45B two-blade swept propellers in the high-speed tunnel at blade angles of 25 degrees, 55 degrees, 60 degrees, 65 degrees, and 70 degrees. The swept propellers were compared with straight propellers and were found to be 10 percent more efficient at a forward Mach number of 0.85 for the design blade angle of 60 degrees. Results regarding the effect of forward Mach number, blade sweep, advance ratio, and constant power coefficient on efficiency are also provided.
Date:
February 6, 1950
Creator:
Delano, James B. & Harrison, Daniel E.
Object Type:
Report
System:
The UNT Digital Library
Longitudinal Trim and Drag Characteristics of Rocket-Propelled Models Representing Two Airplane Configurations
Report discussing an investigation of the longitudinal trim and drag characteristics of two airplane configurations through the transonic speed range. One configuration had a thin straight wing and tail and one had a thicker 35 degree sweptback wing and a 46 degree sweptback tail on the same fuselage-fin arrangement. Information about the control effectiveness and stability and application to a full-scale airplane is also provided.
Date:
February 6, 1950
Creator:
Parks, James H. & Mitchell, Jesse L.
Object Type:
Report
System:
The UNT Digital Library
Temperature survey of the wake of two closely located parallel jets
Report presenting a temperature survey made in the wake of two closely located parallel jets emerging into the atmosphere from two types of twin convergent nozzles. Results regarding the twin unshrouded nozzles and twin nozzles with twin geometry-simulated shrouds are provided.
Date:
February 6, 1950
Creator:
Sloop, John L. & Morrell, Gerald
Object Type:
Report
System:
The UNT Digital Library
The Gasometric Determination of Nitrite and Sulfamate
This report covers an investigation made to develop a gasometric determination that can determine 1.2 x 10-(-5) g. of nitrite with a precision (99% limits) of +/- 8%, and discusses how this procedure works.
Date:
March 6, 1950
Creator:
Carson, W. N.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of thrust augmentation of 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures in compressor
Report presenting an experimental investigation of thrust augmentation of a 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures into the compressor at sea-level, zero-ram conditions. the number, size, and arrangement of interstage nozzles were varied to produce a satisfactory augmentation system of minimum complication. Results regarding the unaugmented performance with and without interstage-injection nozzles, augmented performance with three-stage system, augmented performance with other injection systems, temperature surveys, and engine operation are provided.
Date:
April 6, 1950
Creator:
Povolny, John H.; Useller, James W. & Chelko, Louis J.
Object Type:
Report
System:
The UNT Digital Library
Radioactive Isotopes of Bismuth
Five isotopes of bismuth occur in nature. Using particle accelerators providing helium ions up to 40 Mev in energy and deuterons up to 20 Mev in energy, it was possible to produce and identify two artificial radioactive isotopes. With the advent of the 184-inch Berkeley syncho-cyclotron and its hundreds of Mev energies, it was possible to form highly neutron-deficient bismuth isotopes extending more than ten mass units below stable Bi(209).
Date:
April 6, 1950
Creator:
Neumann, H. M.
Object Type:
Report
System:
The UNT Digital Library
The System Pentaether-Uranyl Nitrate-Nitric Acid-Water
The system pentaether-uranyl nitrate-nitric acid-water has been studied in the liquid-liquid region, Aqueous solutions containing 0.0M to 8.2M nitric acid and 0.0M to 2.3M uranyl nitrate were equilibrated with pentaether, and the effects of nitric acid concentration, uranyl nitrate concentration and temperature are discussed. Phase diagrams for the system are presented and approximate delta-H values are given.
Date:
April 6, 1950
Creator:
Stover, C. N., Jr.
Object Type:
Report
System:
The UNT Digital Library
Clarification of Redox Dissolver Solution by Centrifugation with Scavenger
From statement of objectives: The purposes of the work described in this report are to provide data useful for designing and operating the dissolver solution clarification equipment to be installed in the Redox production plant.
Date:
June 6, 1950
Creator:
Allen, A. W.
Object Type:
Report
System:
The UNT Digital Library
Low-speed lateral stability and aileron-effectiveness characteristics at a Reynolds number of 3.5 x 10(exp 6) of a wing with leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip
Report presenting results of an investigation of the lateral stability and aileron-effectiveness characteristics of a wing with the leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip. Results regarding the static lateral stability characteristics and aileron characteristics are provided.
Date:
July 6, 1950
Creator:
Lange, Roy H. & McLemore, Huel C.
Object Type:
Report
System:
The UNT Digital Library
Low-Speed Static Stability Characteristics of a Canard Model with a 45 Degree Sweptback Wing and a 60 Degree Triangular Horizontal Control Surface
Memorandum presenting an investigation of the low-speed static stability characteristics of a canard model with a 45 degree sweptback wing and a 60 degree triangular horizontal control surface. Results regarding longitudinal stability and control and lateral stability and control are provided.
Date:
September 6, 1950
Creator:
Draper, John W.
Object Type:
Report
System:
The UNT Digital Library
Wind-Tunnel Investigation of the Low-Speed Longitudinal and Lateral Control Characteristics of a Triangular-Wing Model of Aspect Ratio 2.31 Having Constant-Chord Control Surfaces
Report presenting a wind-tunnel investigation to determine the low-speed longitudinal and lateral control characteristics of a model with a triangular wing with NACA 65(06)-006.5 airfoil sections, aspect ratio 2.31, and constant-chord control surfaces. The values of the hinge-moment parameters were found to be of somewhat greater magnitude than would be expected on unswept wings with the same aspect ratio.
Date:
September 6, 1950
Creator:
Wolhart, Walter D. & Michael, William H., Jr.
Object Type:
Report
System:
The UNT Digital Library
Comparison of Diluents for Tributyl Phosphate
From introduction: This report summarizes a study of the composution and physical properties of a number of hydrocarbon diluents together with some generalizations regarding relations between [vapor pressure, density and viscosity] properties.
Date:
October 6, 1950
Creator:
Burger, L. L.
Object Type:
Report
System:
The UNT Digital Library
Investigation of the pressure-ratio requirements of the Langley 11-inch hypersonic tunnel with a variable-geometry diffuser
Report presenting tests in the 11-inch hypersonic tunnel at Mach number 6.86 to determine the effectiveness of an adjustable supersonic diffuser without boundary-layer control in reducing the pressure ratios across the system required to maintain supersonic flow. Testing indicated that the pressure ratio could be reduced to about one-third the pressure ratio required for starting.
Date:
October 6, 1950
Creator:
Bertram, Mitchel H.
Object Type:
Report
System:
The UNT Digital Library
Altitude Test Chamber Investigation of Performance of a 28-Inch Ram-Jet Engine 2: Effects of Gutter Width and Blocked Area on Operating Range and Combustion Efficiency
Altitude-test-chamber investigation of effects of flame-holder blocked area and gutter width on performance of 28-inch diameter ram jet at simulated flight Mach number of 2.0 for altitudes from 40,000 to 55,000 feet was conducted at NACA Lewis laboratory. Ten flame holders investigated covered gutter widths from 1.00 to 2.50 inches and blocked areas from 40.5 to 62.0 percent of combustion-chamber area. Gutter width did not appreciably affect combustion efficiency.
Date:
November 6, 1950
Creator:
Shillito, T. B.; Jones, W. L. & Kahn, R. W.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Alternate Solvents for Diethyl Ether in the Extraction of Uranium From Mallinckrodt Type Ore Feeds
Abstract: Technical report describing an evaluation of solvents for use in the extraction of uranium from Mallinckrodt type ore feeds.
Date:
November 6, 1950
Creator:
Runion, T. C.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Alternate Solvents for Diethyl Ether in the Extraction of Uranium From Mallinckrodt Type Ore Feeds
Technical report evaluating solvents for use in the extraction of uranium from Mallinckrodt type ore feeds. Re-evaluates the Mallinckrodt process in the light of the more recent solvent extraction development that has been carried out at various AEC sites.
Date:
November 6, 1950
Creator:
Runion, T. C.
Object Type:
Report
System:
The UNT Digital Library
X-ray Photometric Determination of Uranium in Metal Oxides
The following report describes the procedures developed for the x-ray photometric determination of uraniuim in metal oxides and sludge and compares results, precision, and length of time of analyses by the General Electric X-Ray Photometer with analyses by the present titration method.
Date:
November 6, 1950
Creator:
Lambert, M. C.
Object Type:
Report
System:
The UNT Digital Library
Dynamic Investigation of Turbine-Propeller Engine Under Altitude Conditions
Memorandum presenting an investigation of the dynamics of a turbine-propeller engine in the altitude wind tunnel employing the frequency-response technique for a range of pressure altitudes form 10,000 to 30,000 feet. The investigation showed that the dynamic responses generalized for pressure altitude over the range of frequencies investigated. Results regarding steady-state characteristics, the linearity investigation, and dynamic characteristics are provided.
Date:
December 6, 1950
Creator:
Krebs, Richard P.; Himmel, Seymour C.; Blivas, Darnold & Shames, Harold
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic characteristics at transonic speeds of a 69 degree delta wing with a triangular plan-form control having a skewed hinge axis and an overhang balance: transonic-bump method
From Introduction: "Presented in this paper are the results of an investigation of a semispan model of a delta wing with 60^o sweepback at the leading edge which was equipped with a large triangular control having an overhang balance mounted on a skewed hinge axis. The purpose of this investigation was to determine the aerodynamic characteristics of a delta wing with a control which was designed to provide aerodynamic balance at zero control deflection based on the span load distribution of reference 1."
Date:
February 6, 1951
Creator:
Wiley, Harleth G.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic characteristics including pressure distribution of a fuselage and three combinations of the fuselage with swept-back wings at high subsonic speeds
From Introduction: "The wings were tested in combination with fuselage similar to the one used in the 7- by 10-foot wind-tunnel investigations. The results are reported herein and are compared with results for three similar model wings on the transonic bump (references 1, 2, and 3)."
Date:
February 6, 1951
Creator:
Sutton, Fred B. & Martin, Andrew
Object Type:
Report
System:
The UNT Digital Library
Altitude-test-chamber investigation of performance of a 28-inch ram-jet engine 3: combustion and operational performance of three flame holders with a center pilot burner
Report presenting a direct-connect altitude test chamber investigation of the combustion performance of a 28-inch-diameter ramjet engine with a can-type center pilot burner. Combustion-chamber configurations with three different flame holders were investigated at a simulated flight Mach number of 2.0 and several different altitudes.
Date:
February 6, 1951
Creator:
Shillito, Thomas B.; Younger, George G. & Henzel, James G., Jr.
Object Type:
Report
System:
The UNT Digital Library
Bronze Furnace History 313 Building
This study was started in May 1949 to find methods of reducing the number of element failures in the salt bath bronze furnaces. Determining the cause of the failure and methods of eliminating them is followed to completion.
Date:
February 6, 1951
Creator:
Correy, Thos. B.
Object Type:
Report
System:
The UNT Digital Library