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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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Tool supports accelerometer in axial alignment with an accelerometer cable connector and permits tightening of the accelerometer to the cable connector with a torque wrench. This is done without damaging the components or permitting them to work loose under sustained, high-level vibrations.
Rotation of planet Mercury from radar observation explained by solar gravitational torque on tidal deformation and equatorial plane asymmetry
Manufacture of the S-IC stage of the Saturn V space vehicle has resulted in new. concepts and innovations in the field of tooling. The structure size (35-ft diameter), the high reliability and accuracy requirements, and the low density or production quantity lead to a greater degree of simplicity, economy, and versatility in fabrication and assembly tooling. There are three specific concepts which should be applicable in industry, local jigging for welding, rotation of structures in vertical assemblies, and the assembly of two structures. The usual weld jigging serves a two-fold purpose: (a) to support the molten weld puddle and (b) to force and maintain alinement of the parts being welded. The extension of this method to large-diameter tanks is expensive and difficult. An alternate procedure used at MSFC is to perform free-state welding and use local jigging (stra1rclamps) and intermittent tack welding. Cylindrical structures can be accurately rotated for routing or welding on a simplified ring turntable. The tool consists of a ring of the structure diameter resting on rollers. Torque is nearly zero since the ring is rotated by friction rollers with the force being applied at the ring perimeter. Two such turntables are used at MSFC. The horizontal mating of two large components, where controlled motions of small magnitude are necessary, can be easily done by positioning units equipped with air-bearings. Such bearings are usable on concrete of minimum surface preparation and require no special air pressure source. This concept is used in assembly of the two S-IC containers.
Apollo navigation and guidance - inertial measurement units and pulse torquing, optical measurements, guidance computer design, and attitude control systems.
Shear moduli of boron filaments determined by dynamic torsion-pendulum and static torque-twist methods
Highly accurate point control system for orbiting satellite utilizing star references, long focal length optics, and small torquing devices
Apollo telescope mount - mission analysis, orbital aerodynamics, aerodynamic torque, orbital lifetime, dynamics, and control
Torque-free precession of spin stabilized spacecraft, showing thrust misalignment as cause for final burnout impulse
Damping technique effect on performance of gravity-gradient satellite stabilization, noting means of creating restoring torques
Mercury rotational period as consequence of solar torques and equatorial asymmetry, based on radar data and model developing superharmonic resonance
Heat energy transfer is concentrated closely around a melted joint and the temperature drop across it decreases rapidly as the bolt and nut are tightened to a minimum torque level. Flat metal surfaces pressed together display a cyclical improvement in heat energy transfer as the interface pressure is increased.
Gimbaled-mirror infrared radiation scanner, with a lightweight torque motor direct coupled to each axis, is capable of scanning in a highly efficient spiral pattern. The scanner is lightweight and can be remotely positioned in previously inaccessible areas because the radiometer head and the gimbaled-mirror scanner can be separated.
Adaptive control circuit prevents saturation of push-pull output amplifiers used in low-power, low-torque suspension system. The adaptive control circuit senses how near the output amplifiers are to saturation and sets the B voltage in such a way as to keep them just clear of saturation.
Hydraulic fluid interaction servovalves - valve design, torque motor specification, environment tests, and vortex valve tests
Flow patterns observed and torque and angular velocity measured to study velocity field induced in Newtonian liquid by rotating cone
Canonical transformation to investigate rotational motion of uniaxial orbiting rigid body influenced by gravity gradient torque
Electrodeless MGD power generation during entry, using torque on magnet taken as rotating member of generator
Gravitational and magnetic torque effects on rotational motion of asymmetric Pegasus satellite in circular orbit