Serial/Series Title
NACA Research Memorandums
4,120
NACA Technical Notes
2,223
Atomic Energy Commission Reports
1,874
United States Geological Survey Reports
1,253
Trace elements investigations report
749
Hanford Works Reports
710
University of California Radiation Laboratory Reports
484
HW (Series)
475
Oak Ridge National Laboratory Reports
473
NACA Technical Reports
382
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12,522 Matching Results
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The Uravan Mineral Belt
"This report briefly describes the [Urvanian Mineral Belt] and outlines the geologic evidence supporting its concept. General plans for continuous exploration of this belt, and preliminary prediction of the total amount of carnotite-bearing rocks that might be in one unexplored area, are also presented"
Date:
February 1950
Creator:
Fischer, R. P.
Object Type:
Report
System:
The UNT Digital Library
Variation With Temperature of Surface Tension of Lubricating Oils
Note presenting surface-tension measurements from room temperature to 180 degrees Celsius of a series of aeronautical lubricating oils and a few liquids of associated interest. The critical temperatures of the liquids are calculated and a general classification of existing oils into three groups is provided.
Date:
February 1950
Creator:
Ross, Sydney
Object Type:
Report
System:
The UNT Digital Library
Water Landing Investigation of a Model Having a Heavy Beam Loading and a 30 Degree Angle of Dead Rise
Results presenting testing of a model with heavy beam loading and an angle of dead rise of 30 degrees subjected to smooth-water impacts in the Langley impact basin. Testing was made at fixed trims of 6 degrees, 15 degrees, 30 degrees, and 45 degrees for a range of flight-path angles and consistent beam-loading coefficient. Time histories of horizontal and vertical displacements, vertical velocity, vertical acceleration, and pitching moment are provided.
Date:
February 1950
Creator:
Batterson, Sidney A. & McArver, A. Ethelda
Object Type:
Report
System:
The UNT Digital Library
Effects of boundary-layer control on the longitudinal characteristics of a 45 degrees swept-forward wing-fuselage combination
Report presenting an investigation to determine the benefits obtainable by applying boundary-layer control to a 45 degree swept-forward wing-fuselage combination. Force and pressure-distribution data were obtained with and without boundary-layer control with various combinations of leading-edge and trailing-edge flaps.
Date:
February 2, 1950
Creator:
McCormack, Gerald M. & Cook, Woodrow L.
Object Type:
Report
System:
The UNT Digital Library
Wing-tunnel investigation at Mach numbers from 0.50 to 1.29 of an all-movable triangular wing of aspect ratio 4 alone and with a body
Report presenting the aerodynamic characteristics of an all-movable, triangular-plan-form wing alone and with a body as determined from semispan model tests. The agreement between calculated and experimental results was not satisfactory for the most part, which seemed to be due to the failure of linear theory to define the actual flow field about the configurations investigated. Results regarding lift characteristics, drag characteristics, and pitching-moment characteristics are provided.
Date:
February 2, 1950
Creator:
Stivers, Louis S. & Malick, Alexander W.
Object Type:
Report
System:
The UNT Digital Library
Correlation of laboratory smoke test with carbon deposition in turbojet combustors
Report presenting a correlation of carbon deposition of 19 fuels in a turbojet combustor as a function of the boiling point and of the flame height at the sooting point of the fuels in a simple wick lamp for a particular combustor operating at a single set of conditions. Two similar investigations with different combustors, operating conditions, and nine different fuels yielded similar correlations on the same graph.
Date:
February 3, 1950
Creator:
Busch, Arthur M.
Object Type:
Report
System:
The UNT Digital Library
The effect of aspect ratio on the subsonic aerodynamic characteristics of wings with NACA 65(sub 1)-210 sections
Report presenting the results of tests of four model wings of aspect ratios 1, 2, 4, and 6 and with NACA 65(sub 1)-210 sections. The experimental lift-curve slope is compared with predictions from theory. Results regarding lift, drag, and pitching moment, lift-curve slope, drag divergence, minimum drag, and pitching moment are provided.
Date:
February 3, 1950
Creator:
Nelson, Warren H. & Erickson, Albert L.
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
Effect of Radiation on Television Equipment : Final Report
The following report follows a test with the purpose of determining the effect upon image fidelity by exposing a television camera to high intensity radiation over an extended period. Provided later in the report are notes on the design of the utiliscope camera used for these tests due to notable design features.
Date:
February 7, 1950
Creator:
White, H. J.
Object Type:
Report
System:
The UNT Digital Library
Lateral-Control Investigation at a Reynolds Number of 5,300,000 of a Wing of Aspect Ratio 5.8 Sweptforward 32 Degrees at the Leading Edge
Memorandum presenting the low-speed lateral control characteristics of a 32 degree sweptforward wing of aspect ratio 5.8 and NACA 65-series airfoil sections as determined in the 19-foot pressure tunnel. The investigation include the measurement of the hinge-moment and normal-force characteristics of an aileron and the rolling-effectiveness characteristics of the aileron and several configurations of spoilers.
Date:
February 7, 1950
Creator:
Graham, Robert R.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Quarterly Report: November and December, 1949 and January, 1950
Quarterly summary report of studies conducted through the Radiation Laboratory, University of California. Some results reported in the report may be of a preliminary or incomplete nature.
Date:
February 7, 1950
Creator:
Lawrence Radiation Laboratory
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Investigation of a Parabolic Body of Revolution at Mach Number of 1.92 and Some Effects of an Annular Jet Exhausting From the Base
Report discussing an investigation of a parabolic body of revolution with and without the effects of an annular jet exhausting from the base. The aerodynamic characteristics, pressures, lift-curve slope, and other characteristics with the jet in operation and inoperative were compared.
Date:
February 8, 1950
Creator:
Love, Eugene S.
Object Type:
Report
System:
The UNT Digital Library
Technical Progress Report for the Period October Through December 1949
Report discussing progress of the Metallurgical Project at the Massachusetts Institute of Technology for the term from October, 1949 through December, 1949.
Date:
February 8, 1950
Creator:
Kaufmann, Albert R.
Object Type:
Report
System:
The UNT Digital Library
Horizontal tail loads in maneuvering flight
From Summary: "A method is given for determining the horizontal tail loads in maneuvering flight. The method is based upon the assignment of a load-factor variation with time and the determination of a minimum time to reach peak load factor. The tail load is separated into various components. Examination of these components indicated that one of the components was so small that it could be neglected for most conventional airplanes; therefore, the number of aerodynamic parameters needed in this computation of tail loads was reduced to a minimum. In order to illustrate the method, as well as to show the effect of the main variables, a number of examples are given. Some discussion is given regarding the determination of maximum tail loads, maximum pitching accelerations, and maximum pitching velocities obtainable."
Date:
February 9, 1950
Creator:
Pearson, Henry A.; McGowan, William A. & Donegan, James J.
Object Type:
Report
System:
The UNT Digital Library
Altitude-wind-tunnel investigation of tail-pipe burner with converging conical burner section on J35-A-5 turbojet engine
An investigation of turbojet-engine thrust augmentation by means of tail-pipe burning has been conducted in the NACA Lewis altitude wind tunnel.
Date:
February 10, 1950
Creator:
Thorman, H. Carl & Campbell, Carl E.
Object Type:
Report
System:
The UNT Digital Library
The Determination of Total Plutonium in the Presence of Aluminum
Introduction: "The adoption of aluminum nitrate as salting agent in the Redox process made it imperative that a method be available for determining plutonium in the presence of aluminum. However, large amounts of aluminum have been found to interfere with the determination of plutonium by the lanthanum fluoride procedure. Previous attempts to increase the accuracy of the lanthanum fluoride method, by precipitating LaF3 from 4 M HF (rather than 2 M), have been successful only when the initial plutonium level was high."
Date:
February 10, 1950
Creator:
Burns, R. E. & Barton, G. B.
Object Type:
Report
System:
The UNT Digital Library
Planing Characteristics of Six Surfaces Representative of Hydro-Ski Forms
Report presenting the planing characteristics for six surfaces representative of hydro-ski forms as determined by tank tests.Testing was made at specified trims, speeds, and sufficient loads to define variations with wetted length. Data from the testing is provided in the form of plots of wetted length, load, resistance, trimming moment, and draft against wetted area.
Date:
February 10, 1950
Creator:
Wadlin, Kenneth L. & McGehee, John R.
Object Type:
Report
System:
The UNT Digital Library
Preparation of Ductile Zirconium: Progress Report for January 1950
Abstract: A new feeder chute on the continuous casting apparatus, and the use of outgassed zirconium chips resulted in a stable arc and quiet pool. Ingots up to 9 1/2 inches in length were made, and some correlation between tension on the ingot and the "necking" effect was determined. Conversions of zirconium iodide to zirconium in the arc dissociation apparatus ran from 41 to 48.2 percent with a maximum of 474 grams of metal produced in 4 hours.
Date:
February 10, 1950
Creator:
DiPietro, W. O.; Findlay, G. R. & Moore, J. H.
Object Type:
Report
System:
The UNT Digital Library
Analytical Investigation of Propeller Efficiency at High Subsonic Flight Speeds near Mach Number Unity
From Introduction: "Tests have recently been conducted in the Langley 8-foot high-speed tunnel (reference 1) to study the effects of changes in operating advance ratio, blade plan form, blade-section thickness, section camber, and other variables on the on the propeller characteristics in the transonic-speed range. The method in reference 2, which evaluated the profile drag losses and the induced losses seperately, is followed in this paper. The method as presented offers the general prediction of propeller performance, and can be used to supplement the experimental data."
Date:
February 13, 1950
Creator:
Gilman, Jean, Jr.; Crigler, John L. & McLean, F. Edward
Object Type:
Report
System:
The UNT Digital Library
Effects of Obstructions in Compressor Inlet on Blade Vibration in 10-Stage Axial-Flow Compressor
Report presenting a blade-vibration survey that was conducted during normal operation of a 10-stage axial-flow compressor powered by part of a complete jet engine. Strain-gage records were obtained from all stages during acceleration, deceleration, and constant-speed runs. Results regarding the inlet disturbances and damping characteristics are provided.
Date:
February 13, 1950
Creator:
Meyer, André J., Jr.; Calvert, Howard F. & Morse, C. Robert
Object Type:
Report
System:
The UNT Digital Library
Studies on the Atomic Bomb Injuries in Hiroshima City
Report on the atomic bomb injuries in Hiroshima City.
Date:
February 13, 1950
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Time Lag Between Flap Deflection and Force Development at a Mach Number of 4
Report presenting an investigation of the time lag between flap deflection and force development on a rectangular wing with a 9-percent-thick symmetrical circular-arc profile with a full-span 30-percent-chord flap. This was performed in order to determine further information about the rapidity of response for a supersonic missile after a given flap deflection due to the potential time lag between the deflection of the controls surfaces and the development of aerodynamic forces.
Date:
February 13, 1950
Creator:
Lindsey, Walter F. & Ulmann, Edward F.
Object Type:
Report
System:
The UNT Digital Library