2000°F Power Conductors for Aerospace Applications

Twenty-two gage and 12-gage power conductors were developed using rhodium power wires, magnesium oxide insulation, platinum sheathing, and alumina end-seals. The conductor systems maintained their electrical integrity through a variety of environmental tests, including vibration, mechanical shock, acceleration, humidity, vacuum, and nuclear radiation. The wires were operated successfully at 2000°F. Rated current was determined and assigned as 10 amperes for 22-gage and 60 amperes for 12-gage conductors. The conductors passed the final cyclic test of carrying rated current at room temperature for 2 hours, at high vacuum for 25 hours, and at a reduced pressure at 2000°F for 3 hours.