Relief valve, 3/8-inch, Mission Pump and Valve Co. part number 1-3688, NASA part number 75M15044 PRV-4 Test report
Test program for relief valve used to prevent over pressurization in pneumatic control systems
VALVE↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Test report for Check Valve 1/2-inch, spring-poppet James, Pond, and Clark part number 220T6-8TT-3 NASA part number 75M12944 FCV-9
Acceptance testing of check valve used in piping for spacecraft support system
VALVE↗
Voyager capsule phase B. Volume IV - Entry science package. Part E - Alternatives and systems analysis. Part F - Future mission options Final report
Design alternatives and systems analysis of Voyager entry science package for Mars atmosphere probe
EXPERIMENT DESIGN↗
A descriptive model for determining optimal human performance in systems. Volume 2 - Part A - System development activities concerned with putting man in an aerospace system. Part B - Development of man- machine systems - Some concepts and guidelines
Descriptive model of system development activities and man machine systems for determining optimal human performance in aerospace systems
Source record↗
Computer-aided electronic circuit design, part 1. Thin film active device investigations, part 2 Status report, 1 Jun. - 30 Nov. 1967
Computerized electronic circuit design, and semiconductor thin film active devices
Source record↗
Measurement of aerodynamic derivatives in wind tunnels and in flight. Part 1 - Research in wind tunnels. Part 2 - Determination in flight of the aerodynamic coefficients of an aircraft by the study of its frequency response
Measuring aerodynamic derivatives in wind tunnels and in-flight and determining aerodynamic coefficients of aircraft by frequency response
Mathe, P.↗
Lyapunov Stability for Partial Differential Equations. Part 1 - Lyapunov Stability Theory and the Stability of Solutions to Partial Differential Equations. Part 2 - Contraction Groups and Equivalent Norms
Liapunov stability theory applied to class of partial differential equations, and generation of contraction groups related to equivalent norms
Buis, G. R.↗
The limiting distribution of the likelihood ratio statistic minus 21 n lambda sub n under a class of local alternatives, part 1. Minimum average risk decision procedures for the noncentral chi-square distribution, part 2
Limiting distribution of likelihood ratio statistic under class of local alternatives and minimum average risk decision procedures for noncentral chi-square distribution
Lever, W. E.↗
Study of improved parts control technology for advanced planetary missions. Volume 4 - Parts appraisal
Transistor, resistor, capacitor, diode, and integrated circuit used as examples of ultrahigh reliability appraisal in advanced planetary missions
Source record↗
Part 1 - Electrode design. Part 2 - Experimental design Quarterly report, Nov. 1968 - Feb. 1969
Electrode development for long-term implantation and measurement of evoked response in rats
Marmarou, A.↗
On-line data analysis of digital pulse-height spectra. Part 1 - Analytical structure. Part 2 - Operational computer systems
On-line digital analysis of geochemical spectra data
Schmadeback, R. L.↗
Gravity gradient preliminary investigations Final report on exhibit B. Part 1 - Field gravity survey. Part 2 - Lunar mascon gravity gradients
Field gravity survey and lunar mascon gravity gradients
Houston, M. H.↗
Research on mechanisms of alloy strengthening. Part 1 - Strengthening through fine particle dispersion. Part 2 - Control of structure and properties by means of rapid quenching of liquid metals /splat cooling/ Semiannual report
Alloy strengthening mechanisms - strengthening by fine particle dispersion, and structure and properties control by rapid quenching or splat cooling of liquid metals
Dalal, H.↗
An analytical method for predicting the stability and control characteristics of large elastic airplanes at subsonic and supersonic speeds. Part 1 - Analysis. Part 2 - Application
Analytical method for predicting stability and control characteristics of large elastic airplanes at subsonic and supersonic speeds
Chevalier, H. L.↗
An investigation of volcanic depressions. Part 1: Airfall and intrusive pyroclastic deposits. Part 2: Subaerial pyroclastic flows and their deposits
Pyroclastic ejecta and the deposits they form were classified in many ways, and many interpretations were given to individual terms. Some classifications are based on the modes of orgin and deposition of the ejecta; others emphasized the chemical and physical composition of the ejecta. Particle-size was used as the prime basis of subdivision, and the same size-limits were used as those employed in the classification of sediments and sedimentary rocks.
Williams, H.↗
A study of LC-39 cryogenic systems. Part 1: A study of the vacuum insulated transfer lines at Kennedy Space Center. Part 2: Cooldown pressure surges
The vacuum liquid hydrogen and liquid oxygen transfer lines at Kennedy Space Center were studied to evaluate the feasibility of using a condensing gas such as CO2 inside the vacuum spaces to achieve a condensing-vacuum. The study indicates that at ambient temperature, a maximum vacuum hyphen space pressure of 4000 microns is acceptable for the LH2 transfer lines. In addition, the cooldown procedures for the 14-inch cross-country liquid oxygen line was studied using a simplified mathematical model. Preliminary cooldown times are presented for various heat leak rates to the line and for two vent configurations.
Ludtke, P. R.↗
Part 1: Classical laser. Part 2: The effect of velocity changing collisions on the output of a gas laser
A classical model for laser action is discussed, in which an active medium consisting of anharmonic oscillators interacts with an electromagnetic field in a resonant cavity. Comparison with the case of a medium consisting of harmonic oscillators shows the significance of nonlinearities for producing self-sustained oscillations in the radiation field. A theoretical model is presented for the pressure dependence of the intensity of a gas laser, in which only velocity-changing collisions with foreign gas atoms are included. A collision model for hard sphere, repulsive interactions was derived. Collision theory was applied to a third-order expansion of the polarization in powers of the cavity electric field (weak signal theory).
Borenstein, M.↗
High temperature thermocouple development program, part A and part B
The problem of extending the useful life of thermocouples intended for in-core and out-of-core thermionic applications in a vacuum environment at temperatures up to 2273 K for periods of time up to 10,000 hours was investigated. Many factors that may influence this useful life were examined, and a basic probe design was developed. With a few modifications, twenty-three thermocouple assemblies were fabricated. Generally the finished thermocouple consisted of solid doped W-3% Re and W-25% Re wires and high purity and high density BeO insulators, and was sheathed in a high purity tantalum tube. In a few probes, stranded thermocouple wires were substituted; commercial grade BeO was used; and in two cases, CVD W-22% Re tubing was used. Each of the components was made of the highest purity materials available; was subjected to special cleaning steps, and was assembled in a class 10,000 clean room. Pertinent physical and chemical properties were determined on each of the components. Special processing techniques were used in the fabrication of the high purity (99.95%), high density (over 95% of theoretical) BeO.
Toenshoff, D. A.↗