Resource Type
Serial/Series Title
Country
191 Matching Results
Results open in a new window/tab.
NACA Investigations of Icing-Protection Systems for Turbojet-Engine Installations
"Investigations have been made in flight and in wind tunnels to determine which components of turbojet installations are most critical in icing conditions, and to evaluate several methods of icing protection. From these studies, the requirements necessary for adequate icing protection and the consequent penalties on engine performance can be estimated. Because investigations have indicated that the compressor-inlet screen constitutes the greatest icing hazard and is difficult to protect, complete removal or retraction of the screen upon encountering an icing condition is recommended" (p. 1).
Date:
May 2, 1951
Creator:
von Glahn, Uwe; Callaghan, Edmund E. & Gray, Vernon H.
Object Type:
Report
System:
The UNT Digital Library
Preliminary evaluation of the air and fuel specific-impulse characteristics of several potential ram-jet fuels 2: magnesium and magnesium - octene-1 slurries
Report presenting a preliminary analytical evaluation of the air and fuel specific-impulse characteristics of magnesium and magnesium-octene-1 slurries. Adiabatic combustion flame temperature, air specific impulse, and fuel-weight specific impulse are given for each fuel.
Date:
May 2, 1951
Creator:
Gammon, Benson E.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Quarterly Progress Report for Period Ending March 20, 1951
Technical report covering classified work of the Critical Experiments Program in the Physics Division for the period December 20, 1950 to March 20, 1951. Report outlines investigations of properties of critical assemblies composed of uranium and various reflectors and moderators, preliminary measurements of the effective energy for fission in the assembly. [From Introduction and Summary]
Date:
July 2, 1951
Creator:
Bernstein, S.; Snell, A. H. & Wollan, E. O.
Object Type:
Report
System:
The UNT Digital Library
Geological Investigation of Mexican Cry Mesa, Lukachukai District, Arizona with Diamond Drilling Recommendations
Abstract: The Salt Wash member of the Jurassic Morrison formation of Mexican Cry Mesa, Lukachukai District, Arizona, was examined to determine size, grade, and distribution of contained carnotite deposits and the possibilities of developing reserves by exploratory drilling. Only three occurrences of carnotite-bearing sandstone were found in 17 miles of rim outcrop. Limited drilling is recommended in the vicinity of these exposures.
Date:
August 2, 1951
Creator:
Ellsworth, Philip C.
Object Type:
Report
System:
The UNT Digital Library
A Thermodynamic Study of the Turbine-Propeller Engine
"Equations and charts are presented for computing the thrust, the power output, the fuel consumption, and other performance parameters of a turbine-propeller engine for any given set of operating conditions and component efficiencies. Included are the effects of the pressure losses in the inlet duct and the combustion chamber, the variation of the physical properties of the gas as it passes through the system, and the change in mass flow of the gas by the addition of fuel" (p. 117).
Date:
August 2, 1951
Creator:
Pinkel, Benjamin & Karp, Irving M.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Surge Characteristics of XJ34-WE-32 Turbojet Engine
Surge characteristics of the XJ34-WE-32 turbojet engine were determined over a range of altitudes. Several typical oscillograph traces during which surge occurred are presented. The effect of altitude on the surge line and it's relation to the steady-state operating region are shown.
Date:
October 2, 1951
Creator:
Groesbeck, Donald E. & Peters, Daniel J.
Object Type:
Report
System:
The UNT Digital Library
Flux Distribution - Converter Reactor
From introduction: "A simplified calculation has been carried out in order to gain some insight into the flux distribution, peak to average power density, efficiency of a catching blanket and the effect of a reflector in the proposed converter reactor."
Date:
January 2, 1952
Creator:
Cohen, E. Richard, 1922-
Object Type:
Report
System:
The UNT Digital Library
Stable Isotope Research and Production Division Quarterly Progress Report: October 1, 1951 to December 31, 1951
From introduction: "During the second quarter of fiscal year 1952, the Isotope Production and Process Development Department placed primary emphasis on the collection of lithium, iron and calcium isotopes."
Date:
January 2, 1952
Creator:
Keim, C. P. & Walton, J. R.
Object Type:
Report
System:
The UNT Digital Library
The Supercritical Water Reactor
From summary: "During 1951 NDA has, at the request of ORNL, been studying the supercritical-water reactor as proposed for aircraft propulsion in Wash-24...This study has concerned itself only with the reactor and shield." The report describes the reactor and the processes involved in developing it. The goal of the development of this reactor is identified as a path to supersonic flight.
Date:
January 2, 1952
Creator:
Nuclear Development Associates, Inc.
Object Type:
Report
System:
The UNT Digital Library
The Distribution of Pu(VI) and Pu(III) in Thenoyltrifluoracetone-Benzene-Nitric Acid Mixtures
The distribution coefficients of Pu(VI) and Pu(III) have been measured as a function of the TTA, hydrogen ion, and nitrate ion concentrations in the TTA-benzen-nitric acid system. The extraction constants for Pu(VI) and Pu(III) are 1.4 X 10(-2) and 2 X 10(-5), respectively.
Date:
February 2, 1952
Creator:
Heising, D. L. & Hicks, T. E.
Object Type:
Report
System:
The UNT Digital Library
The effects on the aerodynamic characteristics of varying the wing thickness ratio of a triangular wing-body configuration at transonic speeds from tests by the NACA wing-flow method
Testing occurred using the NACA wing-flow method at a range of Mach numbers to determine the aerodynamic characteristics of three triangular wing-fuselage models which differed only in wing thickness-chord ratio. The wings had an aspect ratio of 2.31 with 6-, 9-, and 12-percent-thick biconvex sections and a fuselage with a fineness ratio of 12. Results regarding the normal force, chord force, and pitching moment for various angles of attack.
Date:
April 2, 1952
Creator:
Hall, Albert W. & McKay, James M.
Object Type:
Report
System:
The UNT Digital Library
A Study of Second-Order Supersonic Flow Theory
Second-order solutions of supersonic-flow problems are sought by iteration, using the linearized solution as the first step. For plane and axially symmetric flows, particular solutions of the iteration equation are discovered which reduce the second-order problem to an equivalent linearized problem. Comparison of second-order solutions with exact and numerical results shows great improvement over linearized theory.
Date:
April 2, 1952
Creator:
Van Dyke, Milton D.
Object Type:
Report
System:
The UNT Digital Library
The Absorption Spectrum of Hydrated Americium Chloride
The following document focuses on the study of the absorption spectra of americium chloride. Large samples and a spectrograph of great dispersion were used.
Date:
May 2, 1952
Creator:
Stover, Betsy Jones & Conway, John G.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic characteristics of two-plane, unswept tapered wings of aspect ratio 3 and 3-percent thickness from tests on a transonic bump
From Introduction: "The Ames Aeronautical Laboratory has in progress an experimental investigation of the aerodynamic characteristics of wings of interest in the design of high-speed fighter aircraft. This program included an investigation in the Ames 6-by 6-foot supersonic wind tunnel at both subsonic and supersonic Mach numbers of a wing-body combination having a 3-percent-thick, unswept, tapered wing with circular-arc sections and an aspect ratio of 3.1 (reference 1).
Date:
May 2, 1952
Creator:
Emerson, Horace F. & Gale, Bernard M.
Object Type:
Report
System:
The UNT Digital Library
Flight Measurements of the Effects of Surface Condition on the Supersonic Drag of Fin-Stabilized Parabolic Bodies of Revolution
Report presenting testing of rocket-powered models at supersonic speeds to determine some of the surface conditions on the zero-lift drag of fin-stabilized parabolic bodies of revolution. Two types of models and three types of surface roughness were tested. Results regarding mean-drag coefficients, side-pressure coefficients, and total-drag coefficients are provided.
Date:
May 2, 1952
Creator:
Jackson, H. Herbert
Object Type:
Report
System:
The UNT Digital Library
Longitudinal Stability and Drag Characteristics at Mach Numbers From 0.70 to 1.37 of Rocket-Propelled Models Having a Modified Triangular Wing
"A modified triangular wing of aspect ratio 2.53 having an airfoil section 3.7 percent thick at the root and 5.98 percent thick at the tip was designed in an attempt to improve the lift and drag characteristics of triangular wings. Free-flight drag and stability tests were made using rocket-propelled models equipped with the modified wing. The Mach number range of the test was from 0.70 to 1.37" (p. 1).
Date:
May 2, 1952
Creator:
Chapman, Rowe, Jr. & Morrow, John D.
Object Type:
Report
System:
The UNT Digital Library
A Study of the Radiation Burst in the Hanford Homogeneous Reactor
Report discussing the details of a radiation burst in a spherical reactor using plutonium nitrate fuel that occurred on November 16, 1951 at Hanford Works.
Date:
May 2, 1952
Creator:
Leonard, B. R., Jr.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of air-cooled turbine blades in turbojet engine 11: internal-strut-supported rotor blade
Report presenting an investigation of an air-cooled internal-strut-supported blade in a modified production turbojet engine to determine the cooling effectiveness of this type of blade and the cooling-air pressure loss through the blade under engine operating conditions. Experimental results are presented and compared with the results of an analytical investigation.
Date:
June 2, 1952
Creator:
Cochran, Reeves P.; Stepka, Francis S. & Krasner, Morton H.
Object Type:
Report
System:
The UNT Digital Library
Experimental Investigation of the Static Aerodynamic and Dynamic Damping-in-Roll Characteristics of an 8-Cm Aircraft Rocket With Solid and Slotted Fins
Memorandum presenting an investigation of the static aerodynamic and dynamic damping-in-roll characteristics of an aircraft rocket with cruciform fins of trapezoidal plan form as determined experimentally at a range of Mach numbers. The fins had tow holes cut through each fin panel, and the effects of the holes or slots were investigated by testing with both solid and slotted fins.
Date:
June 2, 1952
Creator:
Chubb, Robert S.
Object Type:
Report
System:
The UNT Digital Library
Chemistry Division Quarterly Report March, April, May 1952
Quarterly progress reports on various projects in the Chemistry Division.
Date:
July 2, 1952
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
An Investigation of the Effect of the WADC 30,000-Horsepower Whirl Rig Upon the Static Characteristics of a Propeller
"Tests have been made at the Langley Aeronautical Laboratory on a 6000-horsepower propeller dynamometer installed at a ground test facility to determine the effect of a half-scale model of the Wright Aeronautical Development Center 30,000-horsepower whirl rig upon the aerodynamic characteristics of a three-blade NACA 10-(3)(062)-045 propeller. The model of the whirl rig was mounted in front of the 6000-horsepower propeller dynamometer. Static propeller tests were made for 0deg, 5deg, 10deg, 15deg, and 20deg blade angles over a range of rotational speeds from 600 to 2200 rpm in 100-rpm increments" (p. 1).
Date:
July 2, 1952
Creator:
Salters, Leland B., Jr. & Norton, Harry T., Jr.
Object Type:
Report
System:
The UNT Digital Library
Wind-tunnel investigation of the aerodynamic characteristics in pitch of wing-fuselage combination at high subsonic speeds: Sweep series
Report that is part of a program to investigate the aerodynamic characteristics in pitch, yaw, and steady roll of various model configurations with variations in the wing geometric parameters. The paper presents the aerodynamic characteristics in pitch of wing-fuselage combinations with wings of aspect ratio 4, taper ratio of 0.6, and sweep angles varying from 3.6 degrees to 60 degrees. Results regarding lift characteristics, pitching-moment characteristics, drag characteristics, and lift-drag ratios are provided.
Date:
July 2, 1952
Creator:
Wiggins, James W. & Kuhn, Richard E.
Object Type:
Report
System:
The UNT Digital Library
An Application of the Rocket-Propelled-Model Technique to the Investigation of Low-Lift Buffeting and the Results of Preliminary Tests
"The rocket-propelled-model technique has been applied to the investigation of low-lift buffeting. Results of preliminary tests show that severe buffeting, wing dropping, and normal-force changes occur almost simultaneously near zero lift over a Mach number range near 0.9 on unswept wings 12 percent thick. On unswept wings 7 percent thick, buffeting did not occur; however, mild wing dropping and normal-force changes were experienced" (p. 1).
Date:
September 2, 1952
Creator:
Mason, Homer P. & Gardner, William N.
Object Type:
Report
System:
The UNT Digital Library
Investigation of Subsurface Isorad Methods, Temple Mountain, San Rafael District, Utah
From abstract: The subsurface isorad method is an attempt to locate areas favorable for uranium ores by the use of contour maps which show localities having greater radioactivity. The construction of isorad maps entails the measurement of the area under the curve of a gamma-ray logo The figures obtained indicate relative amounts of gamma radiation and are used to locate the isorad contours. This work was started at Temple Mountain in the San Rafael Swell area during the spring of 1952. The purpose of this investigation is to determine the most effective and economic hole spacing for subsurface isorad work.
Date:
September 2, 1952
Creator:
Hinckley, David Narwyn
Object Type:
Report
System:
The UNT Digital Library