Figure 9.19. Glow Plug.
The following instrumentation is considered necessary for normal operation.
The interturbine temperature sensing system is designed to provide the pilot with an
accurate indication of engine operating temperature taken between the gas generator and power turbines.
The system shown in figure 9.20 consists of twin leads, two busbars, and 10 individual chromel-alumel
thermocouple probes connected in parallel. Each probe protrudes through a threaded boss on the power
turbine stator housing into an area adjacent to the leading edge of the power turbine vanes. This system
generates its own electric current.