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277 Matching Results
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Revision of the Wood Rats of the Genus Neotoma
From introduction: "Result of a study of the wood rats in the collection of the Biological Survey, numbering over 3,000 specimens, including topotypes of most of the species."
Date:
October 19, 1910
Creator:
Goldman, Edward A.
System:
The UNT Digital Library
Effective Gust Structure at Low Altitudes as Determined From the Reactions of an Airplane
"Measurements of gust structure and gust intensity were made in the lower levels of the atmosphere (0 to 3,500 ft.). An Aeronca C-2 airplane was used as the measuring instrument, the gust structure being derived from the recorded motions of the airplane. Data were also obtained on wind velocities and temperatures as functions of altitude for use in attempting to correlate the gust-structure data with various meteorological quantities" (p. 263).
Date:
October 19, 1939
Creator:
Donely, Philip
System:
The UNT Digital Library
Résumé of NACA Stability and Control Tests of the Bell P-63 Series Airplane
Report on stability and control tests of the Bell P-63 series airplanes. Information about the spin characteristics, lateral control characteristics, longitudinal stability and control characteristics and directional stability and control characteristics is provided. A chronology of testing and detailed description of the airplane and its modifications are also provided.
Date:
October 19, 1944
Creator:
Johnson, Harold I.
System:
The UNT Digital Library
A Flight Investigation of the Ice-Prevention Requirements of the United States Naval K-Type Airship
Report discussing a research program to investigate ice prevention and elimination on airships in order to develop suitable airship ice-prevention equipment. A Naval K-type airship was equipped with photographic and meteorological tools in order to record ice formation and the propellers were outfitted with electrically heated blade shoes. Testing discovered that an airship can be flown successfully in wet snow and freezing rain with only the propellers and induction systems protected from the weather.
Date:
October 19, 1945
Creator:
Hillendahl, Wesley H.
System:
The UNT Digital Library
Summary report on the high-speed characteristics of six model wings having NACA 65(sub1)-series sections
A summary of the results of wind-tunnel tests to determine the high-speed aerodynamic characteristics of six model wings having NACA 65sub1-series sections is presented in this report. The 8-percent-thick wings were superior to the 10-percent and 12-percent-thick wings from the standpoint of power economy during level flight for Mach numbers above 0.76. However, airplanes that are to fly at Mach numbers below 0.76 will gain aerodynamically if the percentage thickness of the wing and the aspect ratio are both increased. The lift-curve slopes for the 8-percent-thick wings at 0.85 Mach number were roughly twice their low-speed values.
Date:
October 19, 1945
Creator:
Hamilton, William T. & Nelson, Warren H.
System:
The UNT Digital Library
Drilling of 107-F Test Well
None
Date:
October 19, 1948
Creator:
Brown, R. E.
System:
The UNT Digital Library
An Experimental Investigation at Large Scale of Several Configurations of an NACA Submerged Air Intake
"An investigation of an NACA submerged air intake was conducted on a full-scale model of a fighter-type airplane. This study was made to determine the large-scale aerodynamic characteristics of a submerged air intake proposed as the result of small-scale tests and to compare the pressure-recovery characteristics of the large- and small-scale installations. Additional tests were made to determine the effect on pressure recovery of a systematic variation of ramp divergence" (p. 1).
Date:
October 19, 1948
Creator:
Martin, Norman J. & Holzhauser, Curt A.
System:
The UNT Digital Library
Investigation at a Mach Number of 1.93 to Determine Lift, Drag, Pitching-Moment, and Average Downwash Characteristics for Several Missile Configurations Having Rectangular Wings and Tails of Various Spans
Memorandum presenting an investigation made at a Mach number of 1.93 to determine lift, drag, pitching-moment, and average downwash characteristics of several missile configurations. Five configurations with rectangular wings and tails of various spans were tested; each of the configurations had two locations of the wing relative to the tail.
Date:
October 19, 1950
Creator:
Grigsby, Carl E.
System:
The UNT Digital Library
Theoretical Investigation of a Proportional-Plus-Flicker Automatic Pilot
"The proportional-plus-flicker automatic pilot operates by a nonlinear principle whereby a fast-acting flicker servomotor response is combined with a low-speed proportional servomotor response for the purpose of obtaining supersonic stability and control. Essentially, the autopilot maintains a zero reference about which the output is proportional to the input. However, a flicker response overrides this proportional response at a fixed angle of gimbal displacement on either side of the zero gyroscope reference" (p. 1).
Date:
October 19, 1950
Creator:
Seaberg, Ernest C.
System:
The UNT Digital Library
Hanford works monthly report, September 1951
This is a progress report of the production reactors on the Hanford Reservation for the month of September 1951. This report takes each division (e.g., manufacturing, medical, accounting, occupational safety, security, reactor operations, etc.) of the site and summarizes its accomplishments and employee relations for that month.
Date:
October 19, 1951
Creator:
Prout, G. R.
System:
The UNT Digital Library
REACTION RATE OF SOLID SODIUM WITH AIR
None
Date:
October 19, 1953
Creator:
Howland, W.H. & Epstein, L.F.
System:
The UNT Digital Library
Reduction of Uranium Oxides. Quarterly Report No. 4
None
Date:
October 19, 1953
Creator:
Johnson, S.
System:
The UNT Digital Library
The Response Time of Small Pitot Tubes
None
Date:
October 19, 1953
Creator:
Weissberg, H. L.
System:
The UNT Digital Library
THE EFFECTS OF CARBON, OXYGEN, AND NITROGEN ON THE MECHANICAL PROPERTIES OF TITANIUM AND TITANIUM ALLOYS
None
Date:
October 19, 1955
Creator:
Ogden, H. R. & Jaffee, R. I.
System:
The UNT Digital Library
Heat Transfer Characteristics of Graphite Plates with Hydrogen Coolant
"This note presents the results of a parametric study of heat-generating graphite plates with hydrogen coolant flowing through constant area passages. The heat generation within the graphite was assumed to have a distribution that allowed the centerline temperature of the plates to remain constant at 5000 F. The parametric variables were the mass flow rate per unit area, plate thickness, plate length, and passage hydraulic diameter. The machine calculations were coded by Ivan Cherry, T-1."
Date:
October 19, 1955
Creator:
Bussard, R. W. & Durham, F. P.
System:
The UNT Digital Library
INDEX OF REFRACTION AND LIQUID-VAPOR EQUILIBRIA FOR DEUTERIUM-NITROGEN MIXTURES
None
Date:
October 19, 1955
Creator:
Maimoni, A. & Hanson, D.N.
System:
The UNT Digital Library
Observation of Antiprotons
One of the striking features of Dirac's theory of the electron was the appearance of solutions to his equations which required the existence of an antiparticle, later identified as the positron.
Date:
October 19, 1955
Creator:
Chamberlain, Owen; Segre, Emilio; Wiegand, Clyde & Ypsilantis, Thomas
System:
The UNT Digital Library
Effect of Blade-Section Camber on Aerodynamic Characteristics of Full-Scale Supersonic-Type Propellers at Mach Numbers to 1.04
Report presenting an investigation of the aerodynamic characteristics of two full-scale supersonic propellers with a 6000-horsepower propeller dynamometer. One propeller had symmetrical NACA 16-series airfoil sections and the other was similar except for a blade-section camber and a slight difference in pitch distribution.
Date:
October 19, 1956
Creator:
Maynard, Julian D.; Swihart, John M. & Norton, Harry T., Jr.
System:
The UNT Digital Library
Effect of Camber on the Drag of a Body of Revolution
Memorandum presenting an investigation to determine the effect of camber on the drag of a body of revolution. The drag of a straight body of revolution was measured and compared with that of a body that differed only in that its center line was cambered in the form of a parabola. The addition of a small amount of camber was found to cause very little increase in the minimum foredrag of the model tested.
Date:
October 19, 1956
Creator:
Dickey, Robert R.
System:
The UNT Digital Library
FREQUENCY RESPONSE ANALYSIS OF HRT MOCKUP PRESSURIZER-LEVEL CONTROL LOOP
None
Date:
October 19, 1956
Creator:
Gelman, R. & Robertson, C.S. Jr.
System:
The UNT Digital Library
Hanford Laboratories Operation monthly activities report, September 1956
This is the monthly report for the Hanford Laboratories Operation. Metallurgy, reactor fuels, physics and instrumentation, reactor technology, chemistry, separation processes, biology, financial activities, employee relations, laboratories auxiliaries, radiation protection, operation research, inventions, visits, and personnel status are discussed. This report is for September 1956.
Date:
October 19, 1956
Creator:
unknown
System:
The UNT Digital Library
Processing E-metal in the 200 Areas
This report discusses current plans of the Irradiation Processing Department which call for the inauguration of an E-metal (0.94% U-235) replacement program for the C-metal columns now in reactor use. Other reactor planning is considering the use of E-metal for E-N (lithium) nd E-Co (cobalt) loadings, compensation for reactor biological shields, and for the improved production reactor (IPR). Activation of any of these plans will be dependent on results of the test programs and A.E.C. policy decisions. The quantity of E-metal that might require separation processing is estimated and an economic analysis is provided
Date:
October 19, 1956
Creator:
Platt, A. M. & Tomlinson, R. E.
System:
The UNT Digital Library
Some considerations of the influence of body cross-sectional shape on the lifting efficiency of wing-body combinations at supersonic speeds
From Summary: "Linearized theory is used to estimate the order of magnitude of the beneficial effects that can be obtained by shaping the body of a wing-body configuration to generate lift indirectly at supersonic speeds. The analysis applies to a class of wing-body configurations which is believed to exhibit the essential features of this type of interference; the body is cylindrical upstream of a wing which has supersonic edges and the parts of the body above and below the wing are each semicircular and of different radii. Calculations are presented for a Mach number of the square root of 2 for a particular family of bodies and a sonic-edge delta wing."
Date:
October 19, 1956
Creator:
Klunker, E. B. & Harder, Keith C.
System:
The UNT Digital Library
STUDIES OF FLOW DISTRIBUTION IN THE CORE OF A QUARTER-SCALE FLOW MODEL OF THE PWR REACTOR
None
Date:
October 19, 1956
Creator:
Hazard, H.R. & Allen, J.M.
System:
The UNT Digital Library