Liquid propulsion systems
Bladder and expulsion devices for spacecraft liquid propulsion systems - pinhole leak test fixture, heat sterilization of ethylene propylene with hydrazine, and metal diaphragms
PROPYLENE↗
SEARCH · Engineering Papers
Results for “leak”
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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Criterion for mass drop-off measurements based upon precise pressure and temperature measurements
Mass drop-off measurements, based on precise pressure and temperature measurements, evaluated for space vehicle gas leak detection
PRESSURE MEASUREMENT↗
Thermionic converter life-test results and failure mechanisms.
Thermionic converter life-test results and failure mechanisms noting braze failure, collector deposit, emitter warpage and separation and cesium reservoir leak
THERMIONIC CONVERTER↗
Development of an increased sampling rate monitoring system.
Need for increased sampling rates of particle counters to improve monitoring system performance for clean room sampling and leak testing of HEPA FILTERS
PARTICLE COUNTER↗
Thermal short improves sensitivity of cryogenically cooled maser
In-line, quarter-wave thermal short cools the center conductor of the signal-input coaxial transmission line to a cryogenically cooled traveling wave maser. It reduces both the thermal noise contribution of the coaxial line and the heat leak through the center conductor to the maser at 4.4 degrees K.
Clauss, R. C.↗
Method for reinforcing tubing joints
Joint repair technique uses a longitudinally split aluminum shield over the joint ferrule and immediately adjacent tubing to reseal or reinforce leaking or weak joints in small tubing. Epoxy resin coating on inside surfaces of the two shield halves provides a tightly sealed bond between shield and tubing.
Kinzler, J.↗
Nondestructive testing of brazed rocket engine components
Report details study made of nondestructive radiographic, ultrasonic, thermographic, and leak test methods used to inspect and evaluate the quality of the various brazed joints in liquid-propellant rocket engine components and assemblies. Descriptions of some of the unique equipment and methods developed are included.
Adams, C. J.↗
Study of a Renovated Command Module Laboratory and Renovated Command Module. Volume 2 - Mission System Performance and Configuration Analysis Final Report
Diffusion of Freon and helium trace gases for detection of leaks in aerospace systems
Dodds, J. I.↗
Nondestructive testing - Applications in the outer space environment.
Nondestructive testing techniques for in-space use, discussing leak detection and repair and fuel and pressure line checkout
Beal, J. B.↗
Nondestructive testing - Applications in the outerspace environment.
Nondestructive testing techniques for in-space use, discussing leak detection and repair and fuel and pressure line checkout
Beal, J. B.↗
Frangible electrochemical cell and sealing technique
Electrochemical cell assembly, which includes a positive electrode plate between two negative electrode plates, is both flexible and compact, and frangible under severe shock conditions. Leak-tight integrity of the housing is maintained by polymer-to-polymer fusion bonds through holes in the expanded metal electrode terminals.
Halpert, G.↗
Sealing a rubber bladder between two sections of an accumulator
Leak-free clamping of a two section accumulator is accomplished by a flat metallic ring molded peripherally to the rubber flange of the bladder, and an inset rubber seal bonded to the face of the flange of each section. Method maintains constant torque on the clamping bolts.
Schartau, G. M.↗
Nondestructive testing of brazed rocket engine components.
Radiographic, ultrasonic, thermographic and leak test quality control for brazed liquid propellant rocket engine components
Adams, C.↗
Experimental evaluation of the rate-of-rise method for measuring outgassing rates of three gases between 10 super minus super 6 and 10 super minus super 3 torr.
Leak rate measurement accuracy of rate-of-rise technique for nitrogen, methane and He between millionth and thousandth torr
Gregory, G. L.↗
Investigation of positive shaft seals
Welded metal bellows secondary seals prevent secondary seal leakage with a minimum number of potential leak paths. High performance seal is obtained by controlling the potentially unstable seal-face movements induced by mechanical vibrations and fluid pressure pulsations.
Pfouts, J. O.↗
Low temperature uses of helium
Helium is used for purging and pressurizing cryogenic rocket propellants, welding, atmosphere control, leak detection, and refrigeration. It provides the lowest possible liquid-bath temperature and produces superconductivity in certain materials. Its superfluid effects are used in superconducting magnets.
Brown, G. V.↗
Response of Scout destruct charges to high heat fluxes
Scout missile destruct charge system premature operational response to high temperature environment caused by combustion gas leak during stage separation
Bottorff, J. A.↗
Universal interface enables one recorder to serve numerous measuring instruments
Circuit handles data, regardless of polarity and amplitude, in 10-line decimal form or in any form of binary coded decimal. When measuring instruments have common chassis grounds, Zener diodes prevent low-leak circulating currents from unbalancing the circuit.
Donlin, N. E.↗