Engineering topics
Publications and source records attributed to Spencer, R. L..
Tests confirm operation of five commercial semiconductor devices at cryogenic temperatures. The five devices - one tunnel diode, one field-effect transistor, and three CMOS integrated circuits - all perform well in circuits immersed in liquid-helium bath. For some tests, bath temperature was reduced to 1,25K by pumping.
An ultrasonic scanning mechanism is described that scans panels of honeycomb construction or with welded seams. It incorporates a device which by simple adjustment is adapted to scan either a flat panel or a radial panel. The supporting structure takes the form of a pair of spaced rails. An immersion tank is positioned between the rails and below their level. A work holder is mounted in the tank and is adapted to hold the flat or radial panel. A traveling bridge is movable along the rails and a carriage is mounted on the bridge.
Scientific objectives of the MARV mission are outlined and specific science systems requirements and experimental payloads defined. All aspects of the Martian surface relative to biotic and geologic elements and those relating to geophysical and geochemical properties are explored.
Foam insulation thickness measuring and injection device for spacecraft applications
Surveyor 7 highland landing soil mechanical properties and rock diameter similar to previous sites
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Surveyor soil data evaluation for mechanical properties
Lunar surface mechanical properties at Surveyor 5 site
Mechanical properties of lunar surface material analyzed from engineering and TV data from Surveyor 3 lunar probe
Mechanical properties of Surveyor 7 Tycho landing site compared with properties of maria lunar landing sites
Lunar surface mechanical properties derived from Surveyor 5 photographs
Lunar soil mechanical properties studied by Surveyor 5 erosion experiment
Optical triangulation method for determining lunar surface elevation relative to Surveyor spacecraft
Mechanical properties of lunar surface at Surveyor III landing site
Lunar surface mechanical properties determined by landing impacts, telemetry data from Surveyor III, and comparison of data collected by Surveyor I and Surveyor III
Surveyor I lunar photographs interpretation, and television subsystem