The Oxygen Isotopic Composition of Samples Returned from Asteroid Ryugu with Implications for the Nature of the Parent Planetesimal
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Haolan Tang↗
SEARCH · Engineering Papers
Results for “HOPP”
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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Ancient stardust in fine-grained chondrule dust rims from carbonaceous chondrites
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Jan Leitner↗
Mechanical device accurately measures rf phase differences in vhf or uhf ranges
Dual range linear measurement device accurately measures RF phase differences in either VHF or UHF ranges. The device has a capability consisting of a course range extending to 30 cm readable to 1 mm and any fine range portion of 2.5 cm readable to .01 mm.
Hopp, L. A.↗
Tooling concepts for assembly of large structures
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.
Saturn S-IC stage↗
Development of technology for hot drape forming and nozzles for torus sections Final report, Jun. 1963 - Dec. 1965
Hot drape forming and heat treatment of aluminum base alloy toroidal shell segments
HEAT TREATMENT↗
Design data for ablators. Part III - Mathematical model for decomposition of phenol-formaldehyde ablators Final report
Mathematical model for pyrolytic mechanics of phenol formaldehyde ablators
PYROLYSIS↗
Hot drape forming of torus and semi-toroidal bulkhead segments.
Hot drape forming of torus and semitoroidal bulkhead segments from aluminum alloys
ALUMINUM ALLOY↗
Saturn V, S-IC Y-ring electron beam welding system
Saturn V S-IC electron beam welding system
SATURN S-IC STAGE↗
Development of magnetic coils for continuous use and a coil-positioning and transporter dolly Final report, Jun. 1964 - Feb. 1966
Magnetic coils for continuous use and coil positioning and transporter dolly
MAGNETIC COIL↗
Development of nondestructive, automatic technique for monitoring and recording of fatigue crack growth Final report
Nondestructive, automatic technique for monitoring and recording fatigue crack growth
NONDESTRUCTIVE TESTING↗
Automatic system nondestructively monitors and records fatigue crack growth
Ultrasonic reflection system automatically and nondestructively detects and records the propagation of fatigue cracks in test specimens undergoing fatigue cycling. A reflector plate obtains a reference signal and monitors the location of the tip of a propagating fatigue crack.
Hoppe, F.↗
The welding of Saturn V.
Welding techniques from Saturn 5 booster, discussing surface contamination effect on weld strength
Hoppes, R. V.↗
Rotational and vibrational temperature measurements in the 12-inch hypersonic ceramic-heated tunnel
Electron beam technique of measuring molecular rotational and vibrational temperatures of nitrogen in hypersonic tunnel using air as test gas
Hoppe, J. C.↗
Manufacturing engineering research at MSFC
Manufacturing engineering research at Marshall Space Flight Center
Beyerle, F. J.↗
Experimental Verification of Surface Vehicle Dynamics
Experimental verification of surface vehicle dynamics
Van Deusen, B. D.↗
Branch overlapping in N2/plus/ first negative bands
Diatomic nitrogen ions branch overlapping, discussing rotational line structure in first negative system vibrational bands
Hoppe, J. C.↗
Dual-channel spectrometer for rotational- temperature measurements
Dual spectrometer for rotational temperature measurements on low density nitrogen gas
Hookstra, C. R., Jr.↗
Welding high-strength aluminum alloys
Handbook has been published which integrates results of 19 research programs involving welding of high-strength aluminum alloys. Book introduces metallurgy and properties of aluminum alloys by discussing commercial alloys and heat treatments. Several current welding processes are reviewed such as gas tungsten-arc welding and gas metal-arc welding.
Parks, P. G.↗