Fire detection system for 20's and 30's
Inconel metal lindberg Loops surrounding engine. Consist of inner metal wire surrounded by ceramic and then encased in metal sheath. if loop is severed then fire detection is lossed. Front section energizes Fire light at 480degF, Rear at 510degF
30's the same except that front rated at 410degF and rear at 890degF to turn on fire light.