Engineering topics
Publications and source records attributed to De Witt, R. L..
Thermal cycling tests of ground and space liquid hydrogen storage tank heat shielding with multilayer, purged substrate, thermal insulation blankets
Helium gas requirements for liquid hydrogen expulsion from spherical tank
Thermopiles measure ullage gas temperatures to within plus or minus 1.65 deg K between 20 and 300 deg K, and also serve as point liquid-level sensors. Thermopile technique measures smaller temperature differences by keeping the reference junctions inside the tank and near the temperature range of the measuring junction.
Gaseous-helium requirements for discharge of liquid hydrogen from 5-ft diameter spherical tank
Temperature and liquid-level sensor for liquid hydrogen pressurization and expulsion studies
Effect of pressurant gas injectors during pressurized discharge of liquid hydrogen
Quick-disconnect coupling is used for uncoupling of plumbing during ground-to-vehicle transfer of cryogenic and hazardous fluids. The coupling allows remote positive control of liquid pressure and flow during the transfer operation, remote connection and separation capabilities, and negligible liquid spillage upon disconnection.