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PRESSURE INDICATING GAUGES
GYROSCOPES

Airman - Aviation theories and other practices
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the gauges register from 0 to 3,000 psi. Figure 7-11 shows the hydraulic pressure indicator of a late model naval aircraft. The indicator provides a continuous pressure reading on the number 1 and number 2 flight control systems. The pressure indicator contains two synchros  mechanically  attached  to  two  separate pointers. The pointers show the pressure in each system. ENGINE INSTRUMENTS To properly operate an aircraft, the pilot must monitor many engine instruments. Among these are temperature  indicators,  the  tachometer,  the  fuel quantity indicator, and the vertical scale indicator. Turbine Inlet Temperature Indicator A turbine inlet temperature indicator (fig. 7-12) provides a visual display of the temperature of gases entering the turbine. Dual-unit thermocouples installed in the inlet casing measure the temperature of each inlet. The indicator scale is calibrated in degrees Celsius (EC) from 0 to 12 (times 100). The digital indicator reads from 0 to 1,200EC, in 2-degree increments. Exhaust Gas Temperature Indicator The exhaust gas temperature indicator provides a visual display of the engine's exhaust gases as they leave the turbine unit. A typical exhaust gas temperature indicating system for a modern naval jet aircraft is shown in figure 7-13. 7-9 SYSTEM 1 SYSTEM 2 ANF0711 Figure 7-11.—Hydraulic pressure indicator. ANF0712 Figure 7-12.—Turbine inlet temperature indicator. A M P CR AL D A C ESSENTIAL 115V A-C BUS TURBINE OUTLET CIRCUIT BREAKER CHROMEL(WHITE) ALUMEL(GREEN) DUAL THERMOCOUPLE INDICATOR ANF0713 Figure 7-13.—Exhaust gas temperature indicating system.







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