190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 21-13
21.2.5 Other Piston Engine Applications
In addition to the engines described previously, the G3X system's engine/airframe inputs can be configured
for use with a variety of other engine types.
Sensors for Other Piston Engines - Many other piston engines can be monitored using the supported
engine sensors shown in Table 21-1
, along with custom engine sensor configuration as described in
Appendix H.4.19
for GDU 37X units, or Section 30.4.32 for GDU 4XX units.
Large Piston Engines - A GDU 4XX system with dual GEA 24 EIS units installed can monitor a single
engine with up to 12 cylinders, including radial engines. For large single-engine applications, cylinders
1-6 are connected to GEA 24 #1 and cylinders 7-12 are connected to GEA 24 #2. (see Section 23.4.16
)
Twin Piston Engines - A GDU 4XX system with dual GEA 24 EIS units installed can monitor twin piston
engines with up to 6 cylinders each (see Section 21.2.8
).
Table 21-9 Sensors for Other Piston Engines
Sensor Type Details/Part Number
RPM
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter frequency-to-RPM calibration
Manifold pressure
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Oil pressure
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Oil temperature Use any supported sensor from Table 21-1
Exhaust gas temperature
Use Type K thermocouples. Up to 6 cylinders are supported, or up to 12
cylinders in a GDU 4XX system with dual GEA 24 EIS units.
Cylinder head temperature
Use Type J or Type K thermocouples. Up to 6 cylinders are supported, or
up to 12 cylinders in a GDU 4XX system with dual GEA 24 EIS units.
Turbine inlet temperature Use Type K thermocouples
Carburetor temperature Use any supported sensor from Table 21-1
Fuel pressure
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Fuel flow
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter pulses-per-gallon calibration
Coolant pressure
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Coolant temperature (or
other temperature)
Use "Custom" temperature configuration with RTD, thermistor, or
thermocouple
Hydraulic pressure (or
other pressure)
Use appropriate Garmin pressure sensor or select "Custom"
configuration and enter voltage-to-pressure calibration
Other parameters Use any supported sensor from Table 21-1
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