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NACA Research Memorandums
518
United States Geological Survey Reports
233
Atomic Energy Commission Reports
221
NACA Technical Notes
187
Trace elements investigations report
128
HW (Series)
86
Hanford Works Reports
84
Argonne National Laboratory Reports
54
University of California Radiation Laboratory Reports
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Theoretical Investigation of the Performance of Proportional Navigation Guidance Systems: Effect of Missile Configuration on the Speed of Response
Memorandum presenting a comparison of the maximum speed of response that can be attained by three missile configurations, a variable-incidence-wing, a canard, and a tail-control, in combination with a particular proportional navigation guidance system. The configuration that allows the most rapid overall guidance-system response depends on the control-system characteristics. Results regarding the rate-only feedback and rate and normal acceleration feedback are provided.
Date:
January 19, 1953
Creator:
Abramovitz, Marvin
Object Type:
Report
System:
The UNT Digital Library
Investigation of the Use of a Stick Force Proportional to Pitching Acceleration for Normal-Acceleration Warning
Report presenting an investigation of the feasibility of modifying the transient portion of the stick force in abrupt maneuvers in order to eliminate inadvertent normal-acceleration overshoots. The modification consists of additional stick force proportional to a quantity which leads the normal acceleration. The characteristics introduced by the inclusion of the force were considered to be very desirable by pilots.
Date:
August 14, 1953
Creator:
Abramovitz, Marvin; Schmidt, Stanley F. & Van Dyke, Rudolph D., Jr.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Studies of the Adsorption of Uranium in a Resin-In-Pulp System
Data were obtained in non-flowing and flowing (continuous) batch adsorption systems to serve as a guide to the operating conditions that should be used in a resin-in-pulp adsorption system for the recovery of uranium from ores.
Date:
July 27, 1953
Creator:
Abrams, Charles S. & Kaufman, David
Object Type:
Report
System:
The UNT Digital Library
Preliminary Leaching Tests for the Extraction of Uranium From Various Monticello Stockpile Ores
In a section of the area occupied by the Atomic Energy Commission in Grand Junction, Colorado, a pilot plant is being erected to test a resin-in-pulp process. The process is based on the adsorption of uranium by resin from acid pulps. The first ores to be treated at this plant will be Monticello Stockpile Material. Samples of the various stockpiles sere subjected to a series of leaching, filtering and settling tests, the results of which are presented in this report.
Date:
March 2, 1953
Creator:
Abrams, Charles S.; Moulton, Harry D. & Viklund, Hans I.
Object Type:
Report
System:
The UNT Digital Library
Uranium Occurrences in the Golden Gate Canyon and Ralston Creek Areas, Jefferson County, Colorado
From abstract: Pitchblende, associated with base-metal sulfides, has been found at eight localities in the northern part of Jefferson County, Colo., in shear zones that cut pre-Cambrian metamorphic and igneous rocks, chiefly hornblende gneiss, biotite schist, and granite pegmatite. The pitchblende deposits, with one exception, are in major shear zones that contain vein-like bodies of carbonate-rich breccia. The breccia bodies range from 1 to 5 feet in thickness and are related probably to the Laramide faults, or "breccia reefs" of similar trend, mapped by Lovering and Goddard (1950).
Date:
January 1953
Creator:
Adams, John W.; Gude, Arthur J., III & Beroni, E. P.
Object Type:
Report
System:
The UNT Digital Library
Energy Spectrum of Deuterons Stripped From He3 and the Resultant Neutron Yield
The attenuation curve of the deuterons stripped from He3 has been measured with a Faraday cup. The corresponding curve at 190 Mev was fit by assuming that the deuterons were monoenergetic, with three processes taking place.
Date:
March 10, 1953
Creator:
Adelman, F. L.
Object Type:
Report
System:
The UNT Digital Library
On Neutron Evaporation From Excited Nuclei
At high excitation energies, competition of proton and c-particle emission with neutron emission becomes important. For low excitation, the competition between Y-emission, neutron emission, and fission should be taken into account. To aid in the evaluation of this competition an experiment has been performed to measure the number and energy spectrum of the protons and c-particles emitted in the high energy bombardment of uranium with protons, deuterons, and c-particles.
Date:
June 18, 1953
Creator:
Adelman, Frank L.
Object Type:
Report
System:
The UNT Digital Library
A Study of Efficiencies and Pressure Drop Characteristics of Air-Filtering Media
Removal of particles from air is discussed in terms of three classes of filtering media--air-sampling, respirator, and air-cleaning. Plots of efficiency versus filtering velocity are presented. The pressure drop characteristics of the filters are discussed in terms of initial pressure drops of the clean filters, variations in pressure drop of the individual filters, and comparison of loading rates.
Date:
August 10, 1953
Creator:
Adley, F. E.; Scott, R. H. & Gill, W. E.
Object Type:
Report
System:
The UNT Digital Library
Small-scale transonic investigation of a 45 degree sweptback wing of aspect ratio 4 with combinations of nose-flap deflections and wing twist
Report presenting a small-scale transonic investigation of a semispan wing sweptback 45 degrees and of aspect ratio 4 with combinations of nose-flap deflections and wing twist in the high-speed 7- by 10-foot tunnel over a range of Mach numbers. Lift, drag, and pitching-moment data were obtained for several different configurations.
Date:
January 9, 1953
Creator:
Alford, William J., Jr. & Spreemann, Kenneth P.
Object Type:
Report
System:
The UNT Digital Library
Experimental investigation of the effects of plan-form taper on the aerodynamic characteristics of symmetrical unswept wings of varying aspect ratio
Report presenting an investigation to determine the effects of plan-form taper on the aerodynamic characteristics of a series of symmetrical, unswept wings with thicknesses of 8-percent chord. The wings were tested with four different bodies of revolution over a range of Mach numbers. Results regarding the lift, drag, pitching-moment, lift-curve slope, lift-drag ratio, and pitching-moment curve are provided.
Date:
May 29, 1953
Creator:
Allen, Edwin C.
Object Type:
Report
System:
The UNT Digital Library
The asymmetric adjustable supersonic nozzle for wind-tunnel application
Report presenting the development of an asymmetric type of adjustable supersonic nozzle suitable for application to wind tunnels. This type of nozzle permits continuous adjustment of the test-section Mach number without the requirement of flexible walls.
Date:
March 1953
Creator:
Allen, H. Julian
Object Type:
Report
System:
The UNT Digital Library
A study of the motion and aerodynamic heating of ballistic missiles entering the earth's atmosphere at high supersonic speeds
From Summary: "A simplified analysis of the velocity and deceleration history of ballistic missiles entering the earth's atmosphere at high supersonic speeds is presented. The results of this motion analysis are employed to indicate means available to the designer for minimizing aerodynamic heating. The heating problem considered involves not only the total heat transferred to a missile by convection, but also the maximum average and local time rates of convective heat transfer."
Date:
April 28, 1953
Creator:
Allen, H. Julian & Eggers, A. J., Jr.
Object Type:
Report
System:
The UNT Digital Library
A Study of the Motion and Aerodynamic Heating of Missiles Entering the Earth's Atmosphere at High Supersonic Speeds
From Summary: "A simplified analysis is made of the velocity and deceleration history of missiles entering the earth's atmosphere at high supersonic speeds. It is found that, in general, the gravity force is negligible compared to the aerodynamic drag force and, hence, that the trajectory is essentially a straight line. A constant drag coefficient and an exponential variation of density with altitude are assumed and generalized curves for the variation of missile speed and deceleration with altitude are obtained. A curious finding is that the maximum deceleration is independent of physical characteristics of a missile (e.g., mass, size, and drag coefficient) and is determined only by entry speed and flight-path angle, provided this deceleration occurs before impact. This provision is satisfied by missiles presently of more usual interest."
Date:
August 25, 1953
Creator:
Allen, H. Julian & Eggers, A. J., Jr.
Object Type:
Report
System:
The UNT Digital Library
Force and pressure recovery characteristics at supersonic speeds of a conical spike inlet with a bypass discharging from the top or bottom of the diffuser in an axial direction
Force and pressure-recovery characteristics of a nacelle-type conical-spike inlet with a fixed-area bypass located in the top or bottom of the diffuser are presented for flight Mach numbers of 1.6, 1.8, and 2.0 for angles of attack from 0 degrees to 9 degrees. Top or bottom location of the bypass did not have significant effects on diffuser pressure-recovery, bypass mass-flow ratio, or drag coefficient over the range of angles of attack, flight Mach numbers, and stable engine mass-flow ratios investigated. A larger stable subcritical operating range was obtained with the bypass on the bottom at angles of attack from 3 degrees to 9 degrees at a flight Mach number of 2.0. At a flight Mach number of 2.0, the discharge of 14 percent of the critical mass flow of the inlet by means of a bypass increased the drag only one-fifth of the additive drag that would result for equivalent spillage behind an inlet normal shock without significant reductions in diffuser pressure recovery.
Date:
March 23, 1953
Creator:
Allen, J. L. & Beke, Andrew
Object Type:
Report
System:
The UNT Digital Library
Force and pressure recovery characteristics at supersonic speeds of a conical spike inlet with bypasses discharging in an axial direction
Report presenting an investigation of an axially symmetric nacelle-type conical spike inlet with two bypasses located in the horizontal plane and on opposite sides of the nacelle in the 8- by 6-foot supersonic tunnel at several Mach numbers and angles of attack. Results regarding the performance with open bypasses and with closed bypasses are provided.
Date:
January 30, 1953
Creator:
Allen, J. L. & Beke, Andrew
Object Type:
Report
System:
The UNT Digital Library
Performance comparison at supersonic speeds of inlets spilling excess flow by means of bow shock, conical shock, or bypass
Report presenting a comparison of fixed-geometry, translating-spike, and bypass-inlets on the basis of turbojet- and ramjet-engine performance. Results regarding a comparison of the experimental data and its application to ramjet and turbojet engines are provided.
Date:
October 23, 1953
Creator:
Allen, J. L. & Beke, Andrew
Object Type:
Report
System:
The UNT Digital Library
The Effect of Blade-Section Camber on the Stall-Flutter Characteristics of Three NACA Propellers at Zero Advance
Report presenting an investigation to determine the effect of blade-section camber on the stall-flutter characteristics of three propellers using a 6000-horsepower propeller dynamometer. Up to a certain blade angle, there was an increase in flutter-speed coefficient with an increase in blade-section design lift coefficient. An increase in thrust was found to lead to an increase in tip Mach number in the flutter region of the propeller blades.
Date:
April 6, 1953
Creator:
Allis, Arthur E. & Swihart, John M.
Object Type:
Report
System:
The UNT Digital Library
Transonic Aerodynamic and Trim Characteristics of 1/15-Scale Models of the Convair MX-1964 Airplane With Indented Fuselage
Report presenting an investigation of two scale models of the MX-1964 airplane with indented fuselage conducted in the transonic tunnel. One model had a plane delta wing with full-span elevons and the other had a cambered delta wing with partial-span elevons. Results regarding the aerodynamic characteristics and effect of elevon deflection are provided.
Date:
1953
Creator:
Allis, Arthur E.; Swihart, John M. & Foss, Willard E., Jr.
Object Type:
Report
System:
The UNT Digital Library
Kinetics of the Los Alamos Power Reactor Experiment (LAPRE)
A theoretical study of the kinetics of a model of the Los Alamos Power Reactor Experiment (LAPRE) was made through integration of the dynamic equations with the IBM 701 computer. The stability is investigated under various conditions of power demand, rod-induced reactivity changes, and other conditions especially applicable to LAPRE. The results are given in graphical form, along with conclusions as to appropriate conditions of operation.
Date:
December 1953
Creator:
Allred, John C. & Carter, David S., 1926-
Object Type:
Report
System:
The UNT Digital Library
Some Comments on the Selection of Operating Temperatures for DPR
The results of this investigation indicate that maximum electric power generation can be obtained by selecting the turbine steam temperature within a range of plus/minus 30 degrees C. from an "idealized" steam temperature. This "idealized" steam temperature is shown to depend primarily on the maximum permissible uranium temperature. The minimum available condenser temperature and the temperature rise of the coolant in the pile effect the selection of the turbine steam temperature to lesser extent.
Date:
November 16, 1953
Creator:
Altmann, Manfred.
Object Type:
Report
System:
The UNT Digital Library
Preliminary report on exploration of the San Miguel bench, Montrose County, Colorado
A report discussing an exploration of the san Miguel Bench
Date:
June 2, 1953
Creator:
Alvord, Donald C.
Object Type:
Report
System:
The UNT Digital Library
Method for studying helicopter longitudinal maneuver stability
A theoretical analysis of helicopter maneuver stability is made and the results are compared with experimental results for both a single and a tandem rotor helicopter. Techniques are described for measuring in flight the significant stability derivatives for use with the theory to aid in design studies of means for achieving marginal maneuver stability for a prototype helicopter.
Date:
October 1953
Creator:
Amer, Kenneth B.
Object Type:
Report
System:
The UNT Digital Library
Charts for estimating tail-rotor contribution to helicopter directional stability and control in low-speed flight
"Theoretically derived charts and equations are presented by which tail-rotor design studies of directional trim and control response at low forward speed can be conveniently made. The charts can also be used to obtain the main-rotor stability derivatives of thrust with respect to collective pitch and angle of attack at low forward speeds. The use of the charts and equations for tail-rotor design studies is illustrated. Comparisons between theoretical and experimental results are presented. The charts indicate, and flight tests confirm, that the region of vortex roughness which is familiar for the main rotor is also encountered by the tail rotor and that prolonged operation at the corresponding flight conditions would be difficult" (p. 1).
Date:
October 27, 1953
Creator:
Amer, Kenneth B. & Gessow, Alfred
Object Type:
Report
System:
The UNT Digital Library
Equations, Tables, and Charts for Compressible Flow
"This report, which is a revision and extension of NACA-TN-1428, presents a compilation of equations, tables, and charts useful in the analysis of high-speed flow of a compressible fluid. The equations provide relations for continuous one-dimensional flow, normal and oblique shock waves, and Prandtl-Meyer expansions for both perfect and imperfect gases. The tables present useful dimensionless ratios for continuous one-dimensional flow and for normal shock waves as functions of Mach number for air considered as a perfect gas" (p. 613).
Date:
1953
Creator:
Ames Research Staff
Object Type:
Report
System:
The UNT Digital Library