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  • 1
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    Metal-silicate friction in ultrahigh vacuum (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: Results of the analysis and experiments on the frictional behavior of materials under conditions of ultrahigh vacuum, as related to kinematic problems in a lunar environment, are presented. Experiments have been performed under varying conditions of cleanliness to determine frictional characteristics at 10 to the minus 7th power to 10 to the minus 8th power torr between flat basalt and spherical 7075-T6 aluminum surfaces. A quantitative analysis has been made of the factors influencing frictional behavior of these materials. The proposed mathematical model incorporated parameters of surface cleanliness, surface roughness, and surface energy.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 149-156
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  • 2
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    Accelerated vacuum testing of long life ball bearings and sliprings (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: Extensive analytical studies and testing have been conducted on bearings and sliprings in vacuum at temperatures from 30 to 130 F. Thirty-six bearings lubricated with two types of oil were tested in vacuum of less than 10 to the minus 8th power torr at speeds from 55 to 180 rpm. Temperatures, load, speed, and oil viscosity were varied to evaluate the effects on life and wear. All bearings performed successfully during a 7-month test, and the potential merits of the two oils were compared. Over 25 different, dry-lubricated brush/slipring material combinations have been tested, with variations of brush and ring design and surface speed. Test results indicate the probability of 10 years or more of slipring and brush lifetime with properly designed brushes for 1-in.-diameter ring rotating at 60 rpm.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 127-135
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  • 3
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    Effects of energy dissipation in the bearing assemblies of dual-spin spacecraft (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: Proper evaluation of the effects of bearing assembly flexibility on the attitude stability of dual-spin spacecraft may explain the observed anomalies in the motion of a recently launched satellite. A convenient, but approximate, expression with which to gauge these effects is presented, as in an example of a possible application of this expression in a design role.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 143-148
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  • 4
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    Experiment D016: Power tool evaluation (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: Power tool evaluation was not attempted during the Gemini 11 mission because of the premature termination of the on-umbilical extravehicular activity (EVA). The experiment had been scheduled for the Gemini 8 mission, but early mission termination prevented completion of the experiment. However, the objective, equipment description, and experimental precedures are described briefly in this report.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: The Gemini Program: Phys. Sci. Expt. Sum.; p 513-522
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  • 5
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    Meeting the challenge of a 50000-hour-life-time requirement (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: Space mission requirements for the 70's have established a 50,000-hour-lifetime challenge for the mechanisms designer. This challenge may be met by two approaches: (1) development of new materials for wear-prone elements, and (2) design innovation of new electromechanical devices that do not include mechanical wear-prone components. Present state-of-the-art materials require restricted operation regarding load, speed, and power for gears, bearings, and brush-slipring components. These restrictions are discussed, and methods of improvement are suggested. The design-innovations approach is discussed and is illustrated by the design of an experimental magnetically suspended motor.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: 5th Aerospace Mech. Symp.; p 159-164
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  • 6
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    A motor canister designed for prolonged operation in space (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: A special canister was designed to protest the dc motors used on the ISIS 1 antenna unit. The canister is provided with a pressure-monitoring device and has a special shaft seal that imparts minimum load to the motor output shaft. The development and flight testing of the canister are discussed. Problems that were encountered during fabrication and inspection and the problems caused by material/lubricant incompatibility and low temperature are also discussed.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 137-142
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  • 7
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    Nutation dampers for single-spin satellites (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: The physical principles, analysis, and some of the design considerations of passive nutation dampers for single-spin satellites are discussed.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: 5th Aerospace Mech. Symp.; p 83-85
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  • 8
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    A release mechanism with mechanical redundancy (1971)
    In:  CASI
    Details
    Publikationsdatum: 2005-11-30
    Beschreibung: A simple release mechanism is described that achieves high reliability through active mechanical redundancy on the SERT 2 satellite. Principle of operation, design details, and the test program are discussed. Examples of developmental and proposed alternate configurations also are included.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 121-126
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  • 9
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    Advancements in bearings, seals, and lubricants (1971)
    In:  CASI
    Details
    Publikationsdatum: 2009-11-16
    Beschreibung: Development of bearings, seals, and lubricants for air breathing turbojet engines
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: AIRCRAFT PROPULSION 1971; P 421-463
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  • 10
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    High temperature fastener technology (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Structural fasteners of heat resistant alloys for high temperature applications
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. MANNED SPACECRAFT CENTER NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 2 APR. 1971; P 585-599
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  • 11
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    Designing the brawny gas bearing. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Discussion of a graphic technique for matching specific groove parameters to operating conditions in order to optimize the load carrying capacity of a herringbone-grooved bearing. Details are given on the optimization of the film thickness ratio, the groove width ratio, the groove angle, and the groove length ratio to obtain a maximum radial load capacity. The effect of the dimensionless bearing number on optimal groove configuration parameters is shown in diagrams. Curves are also plotted to compare the capacities of a herringbone-grooved bearing and a plain bearing, showing the former has a higher load capacity than the latter when the dimensionless bearing number is large.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: Machine Design; 43; Dec. 23
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  • 12
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    Dye penetrant indications caused by superficial surface defects in 2014 aluminum alloy welds. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Demonstration that dye penetrant indications on the heat-affected zone of 2014-T6 aluminum GMA weldments are frequently caused by superficial surface conditions and are less than 0.007 in. deep. The following methods are suggested for minimization of these surface defects: stabilization of the arc, application of dc ?GTA' welding procedures, reduction of the caustic etch time, and use of fine grain materials.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: Welding Journal; vol. 50
    Format: text
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  • 13
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    Lubrication with sputtered MoS2 films. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Sputtered MoS2 films (2000-6500 A) were deposited on highly polished metal surfaces. These films have a low coefficient of friction (0.03-0.04) at speeds of 40-80 rpm and loads of 250-1000 grams. At loads of 250 grams the wear lives are over 0.5 million cycles, but at 1000 gram loads, it decreases to 38,000 cycles. Friction experiments and tensile tests have indicated that sputtered films have a strong adherence to metal surfaces. Electron transmission, diffraction and scanning electron microscopy show that these films have an extremely small particle size, less than 30 A in diameter, and are very dense and free from observable pinholes. The high kinetic energy of these sputtered species, the submicroscopic particle size and the sputter-etched substrate surface is responsible for strong adhesion and cohesion of the sputtered film.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 14
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    Detection of failure rate increases (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Systematic detection policies and Monte Carlo experiments on increased failure rate
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: The Deep Space Network, Vol. 4; p 95-100
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  • 15
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    Bearings, lubricants, and seals for actuators and mechanisms (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Bearings, lubricants, and seals for lubricated and hydraulic components for space shuttle with high temperature and vacuum operating capabilities
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 2 APR. 1971; P 601-632
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  • 16
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    The forge phase of friction welding. I, II (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Forge phase rigid and plastic region model of friction welding, deriving interfacial dispersion parameter of weld quality optimization
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; 9-12, 15 (
    Format: text
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  • 17
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    Experimental load capacity and power loss of herringbone grooved gas lubricated journal bearings (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Herringbone grooved gas lubricated journal bearing load capacity, attitude angle and power loss measurements
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; TA FREQUENZA (
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  • 18
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    Analytical studies of contact of nominally flat surfaces - Effect of previous loading (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Previous plastic loading deformation effect on contact area, print number, size distribution and thermal conductivity for flat surfaces
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; - PHYSICAL AND RADIO
    Format: text
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  • 19
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    Reliability estimation procedures and CARE: The Computer-Aided Reliability Estimation Program (1971)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: Ultrareliable fault-tolerant onboard digital systems for spacecraft intended for long mission life exploration of the outer planets are under development. The design of systems involving self-repair and fault-tolerance leads to the companion problem of quantifying and evaluating the survival probability of the system for the mission under consideration and the constraints imposed upon the system. Methods have been developed to (1) model self-repair and fault-tolerant organizations; (2) compute survival probability, mean life, and many other reliability predictive functions with respect to various systems and mission parameters; (3) perform sensitivity analysis of the system with respect to mission parameters; and (4) quantitatively compare competitive fault-tolerant systems. Various measures of comparison are offered. To automate the procedures of reliability mathematical modeling and evaluation, the CARE (computer-aided reliability estimation) program was developed. CARE is an interactive program residing on the UNIVAC 1108 system, which makes the above calculations and facilitates report preparation by providing output in tabular form, graphical 2-dimensional plots, and 3-dimensional projections. The reliability estimation of fault-tolerant organization by means of the CARE program is described.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: JPL Quart. Tech. Rev., Vol. 1, No. 3; p 17-26
    Format: application/pdf
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  • 20
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    Apollo 14 composite casting demonstration (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The purpose of the demonstration was to show that mixtures of materials of different specific gravities would remain stable in the liquid state and during freezing in low g and not segregate as they do on earth. An inflight demonstration was performed on the Apollo 14 mission during the translunar and and transearth coast periods. The apparatus consisted of an electrical heater, a heat sink device for cooling, and sealed metal capsules containing matrix materials having a low-melting point and dispersants. The evaluation of the demonstration samples was accomplished by comparing space processed (flight) samples with (control) samples processed on the ground under otherwise similar conditions. In the low q environment of space flight the dispersions of particles, fibers, and gases in a liquid metal matrix were maintained during solidification. Dispersions of normally immiscible liquids were also maintained during solidification.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-64641
    Format: application/pdf
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  • 21
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    Development of nondestructive testing techniques for plated-through holes in multilayer printed circuit boards (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The development of a nondestructive test with the capability to interrogate plated-through holes as small as 0.51 millimeters inside diameter is discussed. The system can detect defects such as holes, voids, cracks, and thin spots that reduce the current carrying capability of plates-through interconnects by 20 percent or more. Efforts were directed toward the design and fabrication of magnetic circuitry mutual coupling probes and to evaluate the effectiveness of these devices for detecting in multilayer board plated-through holes.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-61378 , C71-995/201
    Format: application/pdf
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  • 22
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    Performance of continuum gas viscoseals. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Viscoseals performance as predicted by three different analytical models is compared with experimental data for air as the continuum gas sealant. An experimental investigation has been conducted on two multiple-grooved two-inch diameter viscoseals up to shaft speeds of 35,000 rpm. The two seal geometries considered differ significantly insofar as groove aspect ratio is concerned. The results of this continuum investigation of sealing coefficient for the gas viscoseals suggest that the Boon and Tal model is a good design tool for the laminar continuum regime provided it is restricted to high aspect ratio groove applications.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 23
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    Experimental load capacity and power loss of herringbone grooved gas lubricated journal bearings. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Load capacity, attitude angle, and power loss were determined for 1-1/2-in.-diam herringbone grooved journal bearings operating in air to speeds of 60,000 rpm. Results showed that groove-to-ridge-clearance ratios of 2.0 to 2.4 give a greater load capacity than do ratios outside this optimum range. Agreement with a small-eccentricity pressure perturbation theory was good for groove-to-ridge-clearance ratios in the optimum range. Power loss, relative to that calculated for a plain bearing of the same dimensions, did not vary widely for the range of geometric variables used. Relative power loss generally increased with speed and was generally comparable to that for a plain bearing.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ASME PAPER 71-LUB-B
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  • 24
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    Viscoseal performance with rarefied-gas sealant (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A fundamental study of viscoseals having a rarefied gas as the sealant has been conducted. Both experimental and analytical investigations are reported. Three different analytical models have been formulated and are described in detail. An experimental investigation has been conducted on multiple grooved two-inch diameter viscoseals over a wide range of gas densities and shaft speeds up to 30,000 rpm. Comparisons are presented between actual viscoseal performance and the theoretical predictions for both sealing coefficient and net leakage parameters as functions of the degree of gas rarefication. Recommendations are presented for the use of the analytical models.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-120911 , AE-71-023-9
    Format: application/pdf
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  • 25
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    Friction, wear, and lubrication in vacuum (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A review of studies and observations on the friction, wear, and lubrication behavior of materials in a vacuum environment is presented. The factors that determine and influence friction and wear are discussed. They include topographical, physical, mechanical, and the chemical nature of the surface. The effects of bulk properties such as deformation characteristics, fracture behavior, and structure are included.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-SP-277 , LC-72-174581
    Format: application/pdf
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  • 26
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    Fabrication of titanium thermal protection system panels by the NOR-Ti-bond process (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A method for fabricating titanium thermal protection system panels is described. The method has the potential for producing wide faying surface bonds to minimize temperature gradients and thermal stresses resulting during service at elevated temperatures. Results of nondestructive tests of the panels are presented. Concepts for improving the panel quality and for improved economy in production are discussed.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-123536 , NOR-71-202
    Format: application/pdf
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  • 27
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    A system reliability analysis for stand-by spares with non-zero unpowered failure rates (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Equations which define the reliability of n-fold parallel systems with stand-by spares, and triply redundant, majority-voting systems with stand-by spares have been derived. The stand-by spares have been assumed to have a non-zero failure rate while in the stand-by mode. A Monte Carlo system simulation has been generated and the results compared to the theoretical reliability predictions. A comparison of these two stand-by configurations is also presented for three through six total units.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-61372
    Format: application/pdf
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  • 28
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    Bipropellant shut-off valve (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: An advanced design of an all metal, fast response, bipropellant, shut-off valve for use on long duration space missions is reported. The valve provides the flow control capability for a 1,000 lb thrust, bipropellant engine using oxygen difluoride and diborane as propellants. The shutoff seal selection is a soft-on-hard metal concept. The soft seal is a spherical shell that seats against a hard conical seat. Beryllium copper and beryllium nickel seals were selected to seal against an electrolyzed Inconel 718 seat. Poppet shaft sealing is achieved by use of hydroformed, Inconel 718 bellows. Two valve assemblies were fabricated and subjected to a series of tests including leak, response time, flow capacity, dry cycles, water cycles, liquid nitrogen cycles, liquid fluorine cycles, and lead-lag operation cycles. These tests demonstrated the ability of the valve to meet design goals.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-125611 , REPT-7-733-2F
    Format: application/pdf
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  • 29
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    A system debugging model. (1971)
    In:  Other Sources
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    Publikationsdatum: 2019-07-27
    Beschreibung: Consideration of the nature of the 'debugging' process applied to a new complex system during the initial period of its life. During this period failures and errors are corrected as they occur, with resulting improvement in the subsequent performance of the system. One mathematical idealization of this process leads to the assumption that system failure rate is decreasing with time. In practice, the debugging phase is considered completed when the failure rate reaches an equilibrium or constant value. Models are formulated for this phenomenon. Maximum likelihood estimates are obtained for relevant failure rate functions and for the end of the debugging period. A conservative upper confidence bound on the stable failure rate is obtained.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 30
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    Viscoseal performance for rarefied gas sealant. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-27
    Beschreibung: Viscoseal performance as predicted by three different analytical models is compared with experimental data for a rarefied gas sealant. An experimental investigation has been conducted on two multiple grooved two-inch diameter viscoseals over a wide range of gas densities and shaft speeds up to 30,000 rpm. The two seal geometries considered differ significantly insofar as groove aspect ratio is concerned. Two types of seal performances are presented in the form of net leakage operation and sealing coefficient performance as functions of the degree of gas rarefication. Although the analytical models correctly predict sealing trends, all of the models are shown to have some deficiencies which prevent their indiscriminate application.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 31
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    Thermal modeling of a cryogenic turbopump for space shuttle applications. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-27
    Beschreibung: Thermal modeling of a cryogenic pump and a hot-gas turbine in a turbopump assembly proposed for the Space Shuttle is described in this paper. A model, developed by identifying the heat-transfer regimes and incorporating their dependencies into a turbopump system model, included heat transfer for two-phase cryogen, hot-gas (200 R) impingement on turbine blades, gas impingement on rotating disks and parallel plate fluid flow. The ?thermal analyzer' program employed to develop this model was the TRW Systems Improved Numerical Differencing Analyzer (SINDA). This program uses finite differencing with lumped parameter representation for each node. Also discussed are model development, simulations of turbopump startup/shutdown operations, and the effects of varying turbopump parameters on the thermal performance.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ASME PAPER 71-WA/HT-43
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  • 32
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    Thermal excursion can cause bond problems. (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-27
    Beschreibung: The purpose of this paper is to illustrate the failure mode caused by thermal deformation and how thermal deformation affects bond integrity. Wege bonding in small-signal transistors, microcircuits and LSI circuits is the subject of this work. Repeated switching of the devices between high and low power at a rate that allows thermal expansion and contraction in the interconnecting wire causes the wire to flex at the point of reduced cross-sectional area until finally the wire breaks due to metal fatigue. It was observed that the thermal deformation was related to many factors such as device power dissipation, current density in the wire, wi *e dress and length, thermal time constant and frequency of operation.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 33
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    Deposition temperature of evaporated Permalloy films (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Evaporated Permalloy films deposition temperature measurement by vacuum evaporated Chromel- constantan thin film thermocouple, noting temperature difference between film and glass substrate
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; ADEMIE DES SCIENCES
    Format: text
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  • 34
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    Evaluation of methods for determining hardware projected life (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: An investigation of existing methods of predicting hardware life is summarized by reviewing programs having long life requirements, current research efforts on long life problems, and technical papers reporting work on life predicting techniques. The results indicate that there are no accurate quantitative means to predict hardware life for system level hardware. The effectiveness of test programs and the cause of hardware failures is considered.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-121065 , PRC-H-101
    Format: application/pdf
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  • 35
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    Friction and wear of selected metals and of carbons in liquid natural gas (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Friction and wear experiments were conducted with hemispherically tipped (4.76-mm radius) rider specimens in sliding contact with a rotating disk submerged in liquid natural gas (LNG). The program included metal combinations and carbon-metal combinations. These experiments revealed that the metal combinations were not lubricated by the LNG. Carbons had much lower wear in LNG than in liquid hydrogen or in liquid nitrogen. (Wear of carbon in liquid hydrogen was 100 times that in LNG.) The friction coefficients obtained in LNG (0.6 for metal-metal and 0.2 for carbon-metal) are similar to those obtained in liquid hydrogen.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6613 , E-6457
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  • 36
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    Preparation and evaluation of Apollo 14 composite experiments (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: An account is given of the work aimed at flight experiments on Apollo 14, in relation to space manufacturing processes. Evaluation of suitable materials, definition of in-flight processing procedures, preparation of preprocessed materials and delivery, and evaluation of the space-processed samples after return from the Apollo 14 flight are presented.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-61368 , GDCA-DBG71-009
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  • 37
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    Saturn component failure rate and failure rate modifiers (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Failure mode frequency ratios, environmental adjustment factors, and failure rates for mechanical and electromechanical component families are presented. The failure rates and failure rate modifiers resulted from a series of studies whose purpose was to provide design, tests, reliability, and systems engineers with accurate, up-to-date failure rate information. The results of the studies were achieved through an extensive engineering analysis of the Saturn Program test data and Unsatisfactory Condition Reports (UCR's) and the application of mathematical techniques developed for the studies.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-64619
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  • 38
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    Reliability computation using fault tree analysis (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A method is presented for calculating event probabilities from an arbitrary fault tree. The method includes an analytical derivation of the system equation and is not a simulation program. The method can handle systems that incorporate standby redundancy and it uses conditional probabilities for computing fault trees where the same basic failure appears in more than one fault path.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-124740 , JPL-TR-32-1542
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  • 39
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    Bibliography of articles and reports on mineral-separation techniques, processes, and applications (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A bibliography of published articles and reports on mineral-separation techniques, processes, and applications is presented along with an author and subject index. This information is intended for use in the mineral-separation facility of the Lunar Receiving Laboratory at the NASA Manned Spacecraft Center and as an aid and reference to persons involved or interested in mineral separation.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-58073
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  • 40
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    Applications of aerospace technology in industry. A technology transfer profile: Welding (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Welding technology is reviewed along with NASA's contributions to the technology. Specific examples of welding technology transfer are given.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-124816
    Format: application/pdf
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  • 41
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    Thermomechanical piston pump development (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A thermally powered reciprocating pump has been devised to replace or augment an electric pump for the transport of temperature-control fluid on the Thermoelectric Outer Planet Spacecraft (TOPS). The thermally powered pump operates cyclically by extracting heat energy from the fluid by means of a vapor-pressure expansion system and by using the heat to perform the mechanical work of pumping. A feasibility test unit has been constructed to provide an output of 7 cu in during a 10- to 100-second cycle. It operates with a fluid input temperature of 200 to 300 F and a heat sink temperature of 0 to 30 F.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA. Goddard Space Flight Center 5th Aerospace Mech. Symp.; p 65-70
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  • 42
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    Evaluation test program, valve, explosive actuated, normally closed Pyronetics model 1400 (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Evaluation tests of the explosive actuated normally closed valves used to control and isolate hydrazine flow in the TOPS spacecraft, are presented. The malfunctions, modifications, service life, and reliability of the valve are also outlined.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-124717 , QC/R-6-046
    Format: application/pdf
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  • 43
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    Basic investigation of turbine erosion phenomena (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: An analytical-empirical model is presented of turbine erosion that fits and explains experience in both steam and metal vapor turbines. Because of the complexities involved in analyzing turbine problems, in a pure scientific sense, it is obvious that this goal can be only partially realized. Therefore, emphasis is placed on providing a useful model for preliminary erosion estimates for given configurations, fluids, and flow conditions.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-1830 , WANL-TME-1977
    Format: application/pdf
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  • 44
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    Design study of shaft face seal with self-acting lift augmentation. 5: Performance in simulated gas turbine engine operation (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The feasibility and the noncontact operation of the self-acting seal was demonstrated over a range of simulated gas turbine engine conditions from 200 to 500 ft/sec sliding speed. Sealed pressure differentials were 50 to 300 psi and sealed temperatures were 150 to 1200 F. Low leakage (about 1/10 that of conventional labyrinth seals) was exhibited in two endurance runs (200 and 338 hr) at 400 ft/sec, 200 psi and 1000 F (gas temperature). For these endurance runs, the self-acting pad wear was less than 3.8 micrometers (0.00015 in.); this low wear was attributed to the noncontact operation of the primary seal. Operating problems identified were fretting wear of the secondary seal and erosion of the primary seal by hard particles.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6563 , E-6312
    Format: application/pdf
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  • 45
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    Applications of aerospace technology in industry, a technology transfer profile: Contamination control (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The strong influence NASA-sponsored research has had on the development of solutions to difficult contamination problems is considered. The contamination control field is comprised of an industrial base, supplying the tools of control; a user base, adopting control techniques; and a technical base, expanding the concepts of control. Both formal and informal mechanisms used by NASA to communicate a variety of technical advances are reviewed and certain examples of the expansion of the user base through technology transfer are given. Issues related to transfer of NASA-generated contamination control technology are emphasized.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-123421
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  • 46
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    The pressure and deformation profile between two colliding lubricated cylinders (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The pressure and deformation profiles between two colliding lubricated cylinders are obtained by solving the coupled, time-dependent elastohydrodynamic equations with an iterative procedure. The analysis includes effects which were not considered in a previous solution, namely, the effect of the lubricant compressibility and the effect of a lubricant with composite pressure-viscosity coefficients. It is found that the local approach velocity plays an important role during final stages of normal approach. It causes the lubricant to be entrapped within the contact region; neither the pressure nor the deformation profile converges to the Hertzian profile for a dry contact. The use of a smaller pressure-viscosity coefficient at high pressures reduces the sharp pressure gradient at the center of the contact and produces a much milder variation of load with respect to the film thickness. The effect of compressibility of the lubricant is found to be relatively small.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-1944
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  • 47
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    Failure-rate computations based on Mariner Mars 1969 spacecraft data (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: An analysis of in-flight spacecraft part hours and failure data from the Mariner Mars 1969 Project is given. It contains failure rates computed from this data for all electronic and electromagnetic parts on the Mariners 6 and 7 spacecraft. Also included are failure rates based on combining flight data from Mariners 4,5,6, and 7.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: JPL-TR-32-1544 , NASA-CR-125066
    Format: application/pdf
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  • 48
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    An evaluation of a hubless inducer and a full flow hydraulic turbine driven inducer boost pump (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The purpose of the study was to compare the performance of several configurations of hubless inducers with a hydrodynamically similar conventional inducer and to demonstrate the performance of a full flow hydraulic turbine driven inducer boost pump using these inducers. A boost pump of this type consists of an inducer connected to a hydraulic turbine with a high speed rotor located in between. All the flow passes through the inducer, rotor, and hydraulic turbine, then into the main pump. The rotor, which is attached to the main pump shaft, provides the input power to drive the hydraulic turbine which, in turn, drives the inducer. The inducer, rotating at a lower speed, develops the necessary head to prevent rotor cavitation. The rotor speed is consistent with present main engine liquid hydrogen pump designs and the overall boost pump head rise is sufficient to provide adequate main pump suction head. This system would have the potential for operating at lower liquid hydrogen tank pressures.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72995 , REPT-11218-F
    Format: application/pdf
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  • 49
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    Predicted characteristics of an optimized series-hybrid conical hydrostatic ball bearing (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Optimized series-hybrid fluid-film ball bearings are described and operating characteristics are calculated and discussed. It is predicted that a series-hybrid bearing may be constructed which will reduce ball-bearing speed by 30 percent thereby increasing bearing fatigue life by factors of up to 5.9. Flow rates required are less than 9 kilograms per minute.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6607 , E-6507
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  • 50
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    Generation of Finite Life Distributional Goodman Diagrams for Reliability Prediction (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The methodology of developing finite life distributional Goodman diagrams and surfaces is described for presenting allowable combinations of alternating stress and mean stress to the design engineer. The combined stress condition is that of an alternating bending stress and a constant shear stress. The finite life Goodman diagrams and surfaces are created from strength distributions developed at various ratios of alternating to mean stress at particular cycle life values. The conclusions indicate that the Von Mises-Hencky ellipse, for cycle life values above 1000 cycles, is an adequate model of the finite life Goodman diagram. In addition, suggestions are made which reduce the number of experimental data points required in a fatigue data acquisition program.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-120813
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  • 51
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    Program listing for the reliability block diagram computation program of JPL Technical Report 32-1543 (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: The computer program listing for the reliability block diagram computation program described in Reliability Computation From Reliability Block Diagrams is given. The program is written in FORTRAN 4 and is currently running on a Univac 1108. Each subroutine contains a description of its function.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-125541 , JPL-TM-33-513
    Format: application/pdf
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  • 52
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    Development of optimized techniques and requirements for computer enhancement of structural weld radiographs. Volume 1: Technical report (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A hardware and software specification covering requirements for the computer enhancement of structural weld radiographs was considered. Three scanning systems were used to digitize more than 15 weld radiographs. The performance of these systems was evaluated by determining modulation transfer functions and noise characteristics. Enhancement techniques were developed and applied to the digitized radiographs. The scanning parameters of spot size and spacing and film density were studied to optimize the information content of the digital representation of the image.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-123814 , ESL-TM213-VOL-1
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  • 53
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    Bonding of reinforced Teflon to metals (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Reinforced FEP Teflon composite material is bonded to a metal substrate by applying a thin layer of copper on the metal surface and disposing irregularly shaped copper particles on the coated surface. The reinforced Teflon is then assembled in contact with the particles, and the assembly is heated under pressure at an elevated temperature below the melting point of the Teflon. A diffusion bond stronger than the reinforced Teflon component is produced, thus enabling the fabrication of self-lubricating bodies with relatively high strength.
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 54
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    Evaluation techniques for the friction behavior of gold sliding contacts operating in high- purity environments (1971)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Gold sliding electric contacts friction behavior, studying adsorbed gas lubrication in ultrahigh purity environments
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; TROPHYSICAL JOURNAL
    Format: text
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  • 55
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    Ultrasonic measurement of thin layers (1971)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: Pulse echo ultrasonic measurement of thin film layer between thick media, using real time computation
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: ; 9-12, 15 (
    Format: text
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  • 56
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    Isothermal elastohydrodynamic theory for the full range of pressure-viscosity coefficient (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Isothermal elastohydrodynamic theory for full range of pressure-viscosity coefficient for heavily loaded rolling contacts
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-1929
    Format: application/pdf
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  • 57
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    The role of anions in mechanical failure (1971)
    In:  CASI
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    Publikationsdatum: 2019-06-27
    Beschreibung: Fabrication and properties of hot-pressed polycrystalline magnesium oxide containing anion impurities
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-121937 , UKY-42-71-MET 14 , AR-2
    Format: application/pdf
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  • 58
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    Test report: Evaluation of Du Pont LRU 488 as a seat seal material in the Marquardt R4D engine valve (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Assessment of molded elastomeric Teflon as seat seal material for R4D engine valve
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-121716 , S-991
    Format: application/pdf
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  • 59
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    Reliability testing and demonstration of aero space problems (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Reliability testing of aerospace problems including sampling, distribution functions, and accelerated life tests
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-67877 , E-5300-1
    Format: application/pdf
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  • 60
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    Checklist of good contamination control practices from a manufacturing viewpoint (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Contamination control checklists for manufacturing or assembly plants
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-121740 , SC-M-70-549
    Format: application/pdf
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  • 61
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    Parameter uncertainties in control system design (1971)
    In:  CASI
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    Publikationsdatum: 2019-06-27
    Beschreibung: Design method including effects of parameter uncertainties in design of linear control systems
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-116774 , TE-46
    Format: application/pdf
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  • 62
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    Preliminary evaluation of the coring potential of the Apollo lunar surface drill titanium core stem (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Drilling tests for evaluating coring potential of Apollo lunar surface drill titanium core stems
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-58057
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  • 63
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    Device for handling printed circuit cards Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Handling tool for printed circuit cards
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
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  • 64
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    NaK-lubricated journal and thrust bearings for a pump motor assembly in SNAP-8 (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: SNAP 8 pump-motor journal and thrust bearing wear tests with high temperature sodium-potassium alloy lubrication
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72824
    Format: application/pdf
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  • 65
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    Rolling-element fatigue lives of through hardened bearing materials (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Hardness and fatigue tests of steel bearing alloys
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-67874 , E-5687
    Format: application/pdf
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  • 66
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    Friction and wear of sintered tungsten, molybdenum, and cobalt-molybdenum impregnated with a fluoride eutectic (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: High temperature friction and wear characteristics of self lubricating composite disks of sintered tungsten, molybdenum, and cobalt molybdenum, impregnated with fluoride eutectic
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6363 , E-6165
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  • 67
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    Effect of surface films on deformation of zinc single-crystal surface during sliding (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Influence of surface films on plastic deformation of zinc single crystals during sliding
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6366 , E-6200
    Format: application/pdf
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  • 68
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    An investigation of oxidation resistant solid lubricant materials (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Wear tests of oxide and fluoride oxidation resistant solid lubricants for use in high temperature gaseous environments
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-67845 , E-6338
    Format: application/pdf
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  • 69
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    Studies of foil journal bearings for Brayton cycle turbomachinery Final report (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Foil journal bearings for Brayton cycle turboalternator
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72864 , RR-71-02
    Format: application/pdf
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  • 70
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    Evaluation of DuPont LRU 488 as a seat seal material in the Marquardt R4D engine valve Test report (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Seal surface profiles of DuPont LRU 488 molded elastomeric seat seals
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-118867 , S-991
    Format: application/pdf
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  • 71
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    Development of quality standards for bipolar LSI devices, phase 2 Final report, 1 Mar. 1970 - 31 Mar. 1971 (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Parametric, functional, and mechanical properties of bipolar LSI devices in simulated space environment
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-119794 , TI-03-71-27
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 72
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    Optimization of conical hydrostatic bearing for minimum friction (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Equations for flow rate, load capacity, and friction torque for conical hydrostatic bearings under laminar and turbulent flow conditions
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6371 , E-6101
    Format: application/pdf
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  • 73
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    Gas liquefication and dispensing apparatus Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Apparatus and process for volumetrically dispensing reagent quantities of volatile chemicals for small batch reactions
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 74
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    Multiducted electromagnetic pump Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Multiducted electromagnetic pump for conductive liquids
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 75
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    Unbekannt
    Dynamic vibration absorber Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Tuned damped vibration absorber for mass vibrating in more than one degree of freedom for use with wind tunnel models
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
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  • 76
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    Ball bearing design for the SNAP-8 turboalternator and mercury pump (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Design and application of tool-steel ball bearings to turboalternator and mercury pump of SNAP-8 electrical generator
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72825 , AEROJET-3656
    Format: application/pdf
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  • 77
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    Suspended mass impact damper Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Suspended mass oscillation damper based on impact energy absorption for damping wind induced oscillations of tall stacks, antennas, and umbilical towers
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
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  • 78
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    Unbekannt
    Pneumatic amplifier Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Pneumatic servoamplifier for controlling flow regulation
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
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  • 79
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    Unbekannt
    Radiator deployment actuator Patent (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Hydraulic actuator design for space deployment of heat radiators
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Format: application/pdf
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  • 80
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    Critical speeds of a rotor in rigidly mounted, externally pressurized, air-lubricated bearings (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Calculation of rotor critical speeds for two bearing rotor system from rigid body theory using film stiffness as determined from zero speed, load eccentricity data
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6350 , E-6134
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 81
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    Experiments on the stability of water lubricated three lobe hydrodynamic journal bearings at zero load (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Water-lubricated three-lobe hydrodynamic journal bearing stability tests at zero load with and without axial grooves
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6315 , E-6050
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 82
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    Combined study program Volume 2 - Ion pump Final report (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Ion pump and magnet assembly for spacecraft mass spectrometer atmospheric sensor system
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-111856 , SPO-30006-VOL-2
    Format: application/pdf
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  • 83
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    Evaluation of cylindrically hollow /drilled/ balls in ball bearings at DN values to 2.1 million (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Performance of high speed bearings with cylindrically hollow balls
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-7007 , E-5889
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 84
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    Preliminary friction and wear studies of cobalt-rhenium solid solution alloy in air and in vacuum (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Friction and wear determination of cobalt-rhenium solid solution alloy in air and in vacuum
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6165 , E-5985
    Format: application/pdf
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  • 85
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    Tungsten as a slipring material for use with gallium lubrication in ultrahigh vacuum (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Tungsten hemisphere against tungsten disk slipring assembly with liquid gallium lubrication in ultrahigh vacuum
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6184 , E-5954
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 86
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    Preliminary studies by field ion microscopy of adhesion of platinum and gold to tungsten and iridium (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Determination of adhesion properties of platinum and gold in contact with tungsten and iridium using field ion microscopy techniques
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6492 , E-6383
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 87
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    Unbekannt
    Cycle testing of boron filament wound tanks (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Filament tensile strengths and pressure-strain characteristics of high modulus, high-strength, boron-filament-wound/resin-composite pressure vessel at ambient and cryogenic temperatures
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72899
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 88
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    External Pressurization Systems for Cryogenic Storage Systems: Design Reference Manual (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Weight and cost estimation for pressurization systems for hydrogen, oxygen, and nitrogen storage
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-115204 , REPT-71-7535
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 89
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    Unbekannt
    Space storable oxidizer valve (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Design, fabrication, and testing of pneumatically operated liquid fluorine shutoff valve
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72691 , ALRC-CE-44
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 90
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    Friction and wear of cobalt-molybdenum and cobalt-molybdenum-chromium alloys for prosthetics (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Friction wear of human hip joint prostheses made from cobalt molybdenum and cobalt molybdenum chromium alloys
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6512 , E-6437
    Format: application/pdf
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  • 91
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    Adhesion of polymers to tungsten as studied by field ion microscopy (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Adhesion of polymers to tungsten as studied by field ion microscopy
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6524 , E-6471
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 92
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    Experimental investigation of self-acting-lift-pad characteristics for main-shaft seal applications (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Shrouded step pads for separating seal surfaces
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6384 , E-6186
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 93
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    Unbekannt
    Experiments on the stability of water-lubricated Rayleigh step hydrodynamic journal bearings at zero load (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Performance tests of water-lubricated, Rayleigh step, hydrodynamic journal bearings under no load conditions to determine stability
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TN-D-6514 , E-6277
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 94
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    An application of failure flow analysis to a GSFC spacecraft project (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Application of failure flow analysis to evaluate test program of Explorer 18 satellite
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-65706 , X-326-71-346
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 95
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    Advanced bearing study. Part 2: Bearing tests (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Tests of ball bearings of various material combinations in liquid hydrogen
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-72280 , PWA-FR-3960-PT-2
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 96
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    Design features and results from fatigue reliability research machines (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Design and performance tests for reversed bending with steady torque fatigue test machine using notched steel specimens
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-TM-X-67949 , E-6580
    Format: application/pdf
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  • 97
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    Automated anesthesia machine report on breadboard testing (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Breadboard testing of automated anesthesia machine
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-122646
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 98
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    A 200-pound diborane shipping container: Design and performance (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Design and storage tests of 200 lb diborane shipping container including storage time, volumetric loading, and pressure-temperature limitations
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-122952 , CCC-71-12
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 99
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    Unbekannt
    Dynamic response and stability of a gas-lubricated Rayleigh-step pad (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Dynamic response of gas lubricated thrust bearing with shrouded Raleigh-step pads
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-122949
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 100
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    Lithium hydride shield segment fabrication (1971)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Design and fabrication of lithium hydride shields for SNAP applications
    Schlagwort(e): MACHINE ELEMENTS AND PROCESSES
    Materialart: NASA-CR-120782 , AI-71-40
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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