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Revision of the Pocket Gophers of the Genus Thomomys

Description: Describes habits, predators, morphology, sexual variation, pelages, and distribution of pocket gophers. Describes genera and group relations. Describes, lists locations and distribution, and provides a key for species and subspecies.
Date: November 15, 1915
Creator: Bailey, Vernon
Partner: UNT Libraries Government Documents Department
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Effect of fuel-air ratio, inlet temperature, and exhaust pressure on detonation

Description: From Summary: "An accurate determination of the end-gas condition was attempted by applying a refined method of analysis to experimental results. The results are compared with those obtained in Technical Report no. 655. The experimental technique employed afforded excellent control over the engine variables and unusual cyclic reproducibility. This, in conjunction with the new analysis, made possible the determination of the state of the end-gas at any instant to a fair degree of precision. Resu… more
Date: November 15, 1939
Creator: Taylor, E. S.; Leary, W. A. & Diver, J. R.
Partner: UNT Libraries Government Documents Department
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Mass Spectrographic Analysis of Solids

Description: Technical report regarding he purpose of the investigation was to evaluate the Chicago mass spectrograph as an analytical instrument for solids.
Date: November 15, 1945
Creator: Garrison, Warren Manford, 1915-
Partner: UNT Libraries Government Documents Department
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Method of Matching Performance of Compressor Systems with that of Aircraft Power Sections

Description: "A method is developed of easily determining the performance of a compressor system relative to that of the power section for a given altitude. Because compressors, reciprocating engines, and turbines are essentially flow devices, the performance of each of these power-plant components is presented in terms of similar dimensionless ratios. The pressure and temperature changes resulting from restrictions of the charge-air flow and from heat transfer in the ducts connecting the components of the … more
Date: November 15, 1945
Creator: Bullock, Robert O.; Keetch, Robert C. & Moses, Jason J.
Partner: UNT Libraries Government Documents Department
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Effect of Fuel Composition, Engine Operating Variables, and Spark-Plug Type and Condition on Preignition-Limited Performance of an R-2800 Cylinder

Description: The preignition characteristics of the R-2800 cylinder, as effected by fuel consumption, engine operating variables, and spark plug type and condition, were evaluated. The effects on preignition-limited performance of various percentages of aromatics (benzene, toluene, cumene, xylene) in a base fuel of triptane were investigated. Two paraffins (triptane and S + 6.0 ml TEL/gal) and two refinery blends (28-R and 33-R) were preignition rated. The effect of changes in the following engine operating… more
Date: November 15, 1946
Creator: Pfender, John F.
Partner: UNT Libraries Government Documents Department
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Investigation of a variable Mach number supersonic tunnel with nonintersecting characteristics

Description: Report presenting a method for the design of supersonic-wind-tunnel nozzles that produce uniform flow over a continuously variable Mach number range without the use of flexible walls. Experimental results from a preliminary investigation of the tunnel are included, including calibration survey of flow, Mach number distributions, and pressure gradients are provided.
Date: November 15, 1948
Creator: Evvard, John C. & Wyatt, DeMarquis D.
Partner: UNT Libraries Government Documents Department
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Investigation of the Effect of Sweep on the Flutter of Cantilever Wings

Description: Report presenting an experimental and analytical investigation of the flutter of uniform sweptback cantilever wings. The experiments used groups of wings sweptback by rotating and by shearing with angles of sweep ranging from 0 to 60 degrees. Results regarding the experimental investigation and a discussion and comparison of the analytical and experimental results are provided.
Date: November 15, 1948
Creator: Barmby, J. G.; Cunningham, H. J. & Garrick, I. E.
Partner: UNT Libraries Government Documents Department
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Stability and control characteristics of a free-flying model with an unswept wing of aspect ratio 3 (XS-3)

Description: The results of power-off force tests and flight tests of a model with a thin unswept low-aspect-ratio wing are presented. The tests were made with the flaps retracted and deflected. The effects on the lateral flight characteristics of decreasing directional stability were noted.
Date: November 15, 1948
Creator: Bennett, Charles V. & Hassell, James L., Jr.
Partner: UNT Libraries Government Documents Department
open access

Altitude-wind-tunnel investigation of J47 turbojet-engine performance

Description: From Introduction: "Data are presented in graphical form to show the engine performance over a range of altitudes from 5000 to 50,000 feet and flight Mach numbers from 0.21 to 0.97. Curves are presented to show the windmilling characteristics of the engine. All engine performance data obtained in the investigation are also presented in tabular form."
Date: November 15, 1949
Creator: Conrad, E. William & Sobolewski, Adam E.
Partner: UNT Libraries Government Documents Department
open access

Hydrodynamic Qualities of a 1/10-Size Powered Dynamic Model of the XP5Y-1 Flying Boat in Smooth Water: Langley Tank Model 246, TED No. NACA DE 320

Description: "The hydrodynamic characteristics of a 1/10-size powered dynamic model of the XP5Y-1 flying boat were determined in Langley tank no. 1. Stable take-offs were possible at all practicable positions of the center of gravity and flap deflections. An increase in gross load from 123.5 to 150.0 pounds (21.5 percent) had only a slight effect on the stable range for take-off" (p. 1).
Date: November 15, 1949
Creator: Woodward, David R.; Weinstein, Irving & Whitaker, Walter E., Jr.
Partner: UNT Libraries Government Documents Department
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Meeting of laboratory and medical directors, October 21 and 22, 1949, Donner Laboratory, University of California, Berkeley, California

Description: The meetings divided into two parts, with reviews of work being done in radiobiology at the University of California by various members of their staff as part one, and, as part two, a meeting conducted by Dr. Shields Warren for Laboratory Directors and their representatives. For the most part papers which were reviewed were summarized material which has appeared in the literature and gave progress to date. Since the purpose of the meeting itself was more for the informal directors meetings, res… more
Date: November 15, 1949
Creator: Kornberg, H. A.
Partner: UNT Libraries Government Documents Department
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Progress Report in Metallurgy: April 1, 1949 to September 30, 1949

Description: Report discussing the progress of the Ames Laboratory in metallurgy for the period from April, 1949 through September, 1949.
Date: November 15, 1949
Creator: Rogers, B. A.; Wilhelm, H. A.; Peterson, D.; Walrath, R. M.; Spedding, F. H.; Daane, A. H. et al.
Partner: UNT Libraries Government Documents Department
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Requirements for heater test element

Description: The test unit is to simulate the conditions existing in the ``active``section of a pile process tube. This section is loaded with 64 slugs each of length equal to 4.3767 inches, giving an overall active length of 23.34 feet. The figure of 4.3767 inches is the overall length of the aluminum can, rather than that of the slug proper. The calculations tabulated on the accompanying data sheet are representative of the conditions of operation of the ``maximum performance tube`` in the pile. The resis… more
Date: November 15, 1949
Creator: Roy, G. M.
Partner: UNT Libraries Government Documents Department
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Activity of pile gas. Rough draft

Description: This memorandum concerns the relative activities of Argon 41 and Nitrogen 16 in the pile gas composed of 95 percent carbon dioxide and 5 percent air. The memorandum is dated November 16, 1950. (JL)
Date: November 15, 1950
Creator: Roesch, W. C.
Partner: UNT Libraries Government Documents Department
open access

Development for Techniques for Rolling Uranium Metal

Description: Uranium can be rolled from cast metal or forged ingot to sheet satisfactory for cupping, deep drawing, and similar fabrication procedures by a combination of hot breakdown in the neighborhood of 600 deg C and warm finishing at 225 to 325 deg C. Sheet may also be obtained by hot rolling alone and by warm rolling alone. However, it is difficult to secure a uniform, controlled grain size by hot rolling only and warm rolling is time consuming because of the limited reduction per pass obtainable. Th… more
Date: November 15, 1950
Creator: Deutsch, D. E.; Hanks, G. S.; Taub, J. M. & Doll, D. T.
Partner: UNT Libraries Government Documents Department
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Development of Techniques for Rolling Uranium Metal

Description: Uranium can be rolled from cast metal or forged ingot to sheet satisfactory for cupping, deep drawing, and similar fabrication procedures by a combination of hot breakdown in the neighborhood of 600 deg C and warm finishing at 225 to 325 deg C. Sheet may also be obtained by hot rolling alone and by warm rolling alone, but the combination of hot and warm rolling afforded the best and most practical method to secure good quality sheet in the quantity required. The percent reduction by hot working… more
Date: November 15, 1950
Creator: Deutsch, D. E.; Hanks, G. S.; Taub, J. M. & Doll, D. T.
Partner: UNT Libraries Government Documents Department
open access

Electroless Nickel Plating

Description: Summary: "This investigation showed that a sound , weather-resistant coating can be applied to uranium that the surface to be plated is cleaned and etched properly. Using the proposed two-bath plating method at 80 C., a four-mil nickel coat can be deposited in thirteen hours."
Date: November 15, 1950
Creator: Groot, C. & Hopkins, H. H.
Partner: UNT Libraries Government Documents Department
open access

Experimental investigation of a flat plate paddle jet vane operating on a rocket jet

Description: Report presenting the results of static tests conducted for the purpose of determining the lift forces and hinge moments associated with a flat-plate paddle vane, externally hinged near a rocket-nozzle exit and operating on the jet for vane deflection angles ranging from -4 degrees to 25 degrees. Results regarding vane aerodynamic characteristics, performance of rocket motor, and vane erosion
Date: November 15, 1950
Creator: Bond, Aleck C.
Partner: UNT Libraries Government Documents Department
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