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7,011 Matching Results
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Preliminary Tests of a Burner for Ram-Jet Applications
"Preliminary tests have been made of a small burner to meet the requirements for application to supersonic ram jets. The principal requirements were taken as: (1) efficient combustion in a high-velocity air stream, (2) utilization for combustion of only a small fraction of the air passing through the unit, (3) low resistance to air flow, (4) simple construction, and (5) light weight. Tests of a small burner were carried to stream velocities of nearly 150 feet per second and fuel rates such that one-eighth to one-fourth of the total air was involved in combustion" (p. 1).
Date:
January 15, 1947
Creator:
Huber, Paul W.
System:
The UNT Digital Library
Langley full-scale-tunnel investigation of the factors affecting the static lateral-stability characteristics of a typical fighter-type airplane
"The factors that affect the rate of change of rolling moment with yaw of a typical fighter-type airplane were investigated in the Langley full-scale tunnel on a typical fighter-type airplane. Eight representative flight conditions were investigated in detail. The separate effects of propeller operation, of the wing-fuselage combination, and of the vertical tail to the effective dihedral of the airplane in each condition were determined. The results of the tests showed that for the airplane with the propeller removed, the wing-fuselage combination had positive dihedral effect which increased considerably with increasing angle of attack for all conditions" (p. 1).
Date:
April 15, 1947
Creator:
Lange, Roy H.
System:
The UNT Digital Library
Compilation of Test Data on 111 Free-Spinning Airplane Models Tested in the Langley 15-Foot and 20-Foot Free-Spinning Tunnels
"A compilation of free-spinning-airplane model data on the spin and recovery characteristics of 111 airplanes is presented. These data were previously published in separate memorandum reports and were obtained from free-spinning tests in the Langley 15-foot and the Langley 20-foot free-spinning tunnels. The model test data presented include the steady-spin and recovery characteristics of each model for various combinations of aileron and elevator deflections and for various loadings and dimensional configurations" (p. 1).
Date:
May 15, 1947
Creator:
Malvestuto, Frank S., Jr.; Gale, Lawrence J. & Wood, John H.
System:
The UNT Digital Library
Investigation of 10-Stage Axial-Flow X24C-2 Compressor, 1, Performance at Inlet Pressure of 21 Inches Mercury Absolute and Inlet Temperature of 538 Degrees R
The performance at inlet pressure of 21 inches mercury absolute and inlet temperature of 538 R for the 10-stage axial-flow X24C-2 compressor from the X24C-2 turbojet engine was investigated. the peak adiabatic temperature-rise efficiency for a given speed generally occurred at values of pressure coefficient fairly close to 0.35.For this compressor, the efficiency data at various speeds could be correlated on two converging curves by the use of a polytropic loss factor derived.
Date:
July 15, 1947
Creator:
Schum, Harold J. & Buckner, Howard A., Jr.
System:
The UNT Digital Library
A Summary Report on the Effects of Mach Number on the Span Load Distribution on Wings of Several Models
Memorandum presenting an investigation of the change in spanwise load distribution at high Mach numbers, which is of considerable interest because lateral movement of the center of lift affects the trim, stability, and structural factors of safety of an airplane. The data is not sufficient to permit isolation of the effects of changes in wing configuration, but in a majority of cases, the tests reveal a tendency for the center of lift to shift outboard with increasing Mach number.
Date:
July 15, 1947
Creator:
Jessen, Henry, Jr.
System:
The UNT Digital Library
Waste disposal: Failure of T Plant underground metal waste line from Section 9
On June 23, 1947, a hole was discovered in the earthen fill near the T Plant R-19 stairwell directly above the path followed by the underground waste lines from the canyon. Jetting of all canyon wastes to the 241 Buildings was stopped and the canyon process shut down. This report discusses repair and characterization procedures for the soils and waste line pipe.
Date:
July 15, 1947
Creator:
Chapman, V. R.
System:
The UNT Digital Library
Combustion-efficiency investigation of special fuels in single tubular-type combustor at simulated altitude conditions
Report presenting a combustion-efficiency investigation of 10 special straight-run distillate fuels in an individual tubular-type combustor unit of a 14-unit assembly at two simulated engine operating conditions. These distillates were obtained from various crude oils and consisted of hydrocarbon mixtures with distillations temperature varying from 93 to 690 degrees Fahrenheit. Comparison of temperature measurements obtained from two locations in the exhaust duct showed that under certain operating conditions the flame extended beyond the turbine position.
Date:
August 15, 1947
Creator:
Dittrich, Ralph T.
System:
The UNT Digital Library
Obliquity Factors for Shields
The following preliminary report describes obliquity factors for shields of various shapes.
Date:
August 15, 1947
Creator:
Brooks, Harvey
System:
The UNT Digital Library
River water sampling, Columbia River: Determination of necessity of cross sectional sampling
This document contains raw laboratory data concerning the testing done at the Columbia River at the Hanford Site.
Date:
September 15, 1947
Creator:
Butler, B. F.
System:
The UNT Digital Library
SUMMARY REPORT ON DESIGN AND DEVELOPMENT OF HIGH TEMPERATURE GAS-COOLED POWER PILE
None
Date:
September 15, 1947
Creator:
McCullough, C.R.
System:
The UNT Digital Library
CHEMICAL PROCESS TO RECOVER URANIUM FROM PHOSPHATE ROCK
None
Date:
November 15, 1947
Creator:
Igelsrud, I.
System:
The UNT Digital Library
Topical Report on Chemical Process to Recover Uranium from Phosphate Rock
The following report summarizes research done on dissolving uranium from phosphate rock and superphosphate and recovering it from solution in a more concentrated form.
Date:
November 15, 1947
Creator:
Igelsrud, Iver
System:
The UNT Digital Library
234-5 Project, Specification Letter 234-9, 235-9, Analytical Control Laboratory
This document presents the details of the design of the analytical control laboratory for the 234-5 project at the Hanford site.
Date:
December 15, 1947
Creator:
Curtis, R.E.
System:
The UNT Digital Library
Experimental Investigation of a Preloaded Spring-Tab Flutter Model
"An experimental investigation was made of a preloaded spring-tab flutter model to determine the effects on flutter speed of aspect ratio, tab frequency, and preloaded spring constant. The rudder was mass-balanced, and the flutter mode studied was essentially one of three degrees of freedom (fin bending coupled with rudder and tab oscillations). Inasmuch as the spring was preloaded, the tab-spring system was a nonlinear one" (p. 1).
Date:
December 15, 1947
Creator:
Smith, N. H.; Clevenson, S. A. & Barmby, J. G.
System:
The UNT Digital Library
Wind-Tunnel Investigation of the Low-Speed Characteristics of a 1/8-Scale Model of the Republic XP-91 Airplane with a Vee and a Conventional Tail
"Low-speed wind-tunnel tests of a l/8 scale model of the Republic XP-91 airplane were made to determine its low-speed characteristics and the relative merits of a vee and a conventional tail on the model. The results of the tests showed that for the same amount of longitudinal and directional stability the conventional tail gave less roll due to sideslip than did the vee tail. The directional stability of the model was considered inadequate for both the vee and conventional tails; however, increasing the area and aspect ratio of the conventional vertical tail provided adequate directional stability" (p. 1).
Date:
December 15, 1947
Creator:
Weiberg, James A. & Anderson, Warren E.
System:
The UNT Digital Library
Analysis of variation of piston temperature with piston dimensions and undercrown cooling
From Summary: "A theoretical analysis is presented that permits estimation of the changes in piston-temperature distribution induced by variations in the crown thickness, the ring-groove-pad thickness, and the undercrown surface heat-transfer coefficient. The analysis consists of the calculation of operating temperatures at various points in the piston body on the basis of the experimentally determined surface heat-transfer coefficients and boundary-region temperatures, as well as arbitrarily selected surface coefficients."
Date:
January 15, 1948
Creator:
Sanders, J. C. & Schramm, W. B.
System:
The UNT Digital Library
The Founding of the Brookhaven National Laboratory - Associated Universities, Inc.
At the end of the war it became apparent that the teamwork of government and scientific institutions, which had been so effective in wartime work, must somehow be perpetuated in order to insure the continued progress of nuclear science in peace time. The enormous expense of the tools needed to pursue the next steps in this research -- nuclear reactors and high energy accelerators -- and the shortage of scientifically trained personnel pointed towards the establishment of a cooperative laboratory. Such a laboratory, using government funds, could carry out a comprehensive research program that would benefit the many interested research groups throughout the country. As a result of the wartime programs under the Manhattan District, centers of research in nuclear science were already active at the Radiation Laboratory in Berkeley, California, at Los Alamos in New Mexico, at the Clinton Laboratories in Oak Ridge, Tennessee and at the Argonne Laboratory in Chicago. No analogous nuclear research laboratories, however, had developed in the Northeast, and since so much of the nation's scientific talent and industrial activities are concentrated in the northeastern states, it was proposed that a new laboratory be established near New York City. As a result of this plan, …
Date:
January 15, 1948
Creator:
LABORATORY, BROOKHAVEN NATIONAL
System:
The UNT Digital Library
The Metabolism of Curium in the RAT
The heaviest of the known elements is curium, which was recently discovered by Seaborg and his associates. This new element can be produced by the alpha particle transmutation of plutonium by the following reaction: {sub 94}Pu{sup 239} + {sub 2}He{sup 4} {yields} {sub 96}Cm{sup 242} + {sub 0}N{sup 1} This isotope of curium is radioactive and decays by the emission of an alpha particle to form plutonium 238 which, in turn, is also radioactive. Curium 242 has a half-life of 150 days, and its radioactive daughter, plutonium 238, has a half-life of 50 years. This isotope of plutonium decays by the emission of an alpha particle to form uranium 234 which has a half-life of 233,000 years. Shortly after the organization of the Atomic Energy Project, it became apparent that formidable problems would be presented as the result of the release of nuclear energy. One of the most urgent of these was the hazard presented by the production of large quantities of the radio-elements created by the fission of uranium and the coincidental formation of neptunium and plutonium. In an attempt to evaluate the potential danger presented by these radio-elements from the chain reacting pile, a large series of metabolic …
Date:
January 15, 1948
Creator:
Hamilton, J.; Scott, K. & Axelrod, D.
System:
The UNT Digital Library
Application of Theodorsen's theory to propeller design
A theoretical analysis is presented for obtaining, by use of Theodorsen's propeller theory, the load distribution along a propeller radius to give the optimum propeller efficiency for any design condition. The efficiencies realized by designing for the optimum load distribution are given in graphs, and the optimum efficiency for any design condition may be read directly from the graph without any laborious calculations. Examples are included to illustrate the method of obtaining the optimum load distributions for both single-rotating and dual-rotating propellers.
Date:
March 15, 1948
Creator:
Crigler, John L.
System:
The UNT Digital Library
Review of stuck slugs
Records show that difficulty has been encountered with the discharge of two tubes in B Pile, twelve in the D Pile, and fifteen in the F Pile during the period from initial start-up until March 15, 1948. In sixteen cases the tubes have been replaced, six of the tubes which were in the fringe have been made air tubes, four did not warrant replacement, and three are to be replaced in the future. General statistics for these twenty-nine tubes are presented with additional details in this report.
Date:
March 15, 1948
Creator:
Alexander, W. K. & Woods, W. K.
System:
The UNT Digital Library
The Acute Radiotoxicity of Injected Na²⁴ for Mice and Rats
The following report describes the results from studies based on the toxicity and metabolism of radioactive substances derived from uranium fission. Rats and mice were administered radioactive sodium and reactions and changes were studied.
Date:
April 15, 1948
Creator:
Finkle, R. D.; Snyder, R. H.; Kisieleski, Walter E.; Teresi, J.; Broido, A. & Tompkins, P. C.
System:
The UNT Digital Library
Radiochemistry 3
Report discussing a general introduction to heavy element chemistry.
Date:
April 15, 1948
Creator:
Zebroski, E. L.
System:
The UNT Digital Library
Altitude-wind-tunnel investigation of thrust augmentation of a turbojet engine IV: performance with tail-pipe burning and water injection
From Introduction: "Thrust augmentation of an axial-flow-type turbojet engine by burning fuel in the tail pipe is discussed in references 1 to 3. Thrust augmentation of the same turbojet engine by water injection at the compressor inlet is reported in reference 4."
Date:
June 15, 1948
Creator:
Dietz, Robert O., Jr.; Wishnek, George & Kuenzig, John K.
System:
The UNT Digital Library
High-Speed Wind-Tunnel Tests of a 1/16-Scale Model of the D-558 Research Airplane: D-588-1 Speed-Reduction Brake and Symmetrical-Profile Wing Characteristics
Report presenting the results of pitching-moment, lift, and drag measurements on a model of the D-558-1 with speed reduction brakes and a symmetrical profile wing at a range of Mach numbers. Only a small decrement in Mach number is produced with no nose-inlet flow and the speed-reduction brakes deflected.
Date:
June 15, 1948
Creator:
Wright, John B.
System:
The UNT Digital Library