Garmin G900X Pilot's Manual - page 107
190-00726-00 Rev. A
Garmin G900X Pilot’s Guide
3-15
ENGINE INDICATION SYSTEM
FUEL CALCULATIONS
NOTE:
Fuel calculations do not use the aircraft fuel quantity indicators and are calculated from the last time
the fuel was reset.
Fuel used (GAL USED), endurance (ENDUR), range (in nautical miles, RANGE NM), and fuel efficiency (in
statute miles per gallon, MPG) are calculated based on the displayed fuel remaining (GAL REM) and the fuel
flow totalizer. The calculated range also takes into account the aircraft’s heading and the wind direction and
speed.
Adjusting the fuel totalizer quantity:
On the Engine Page, use the
DEC FUEL
and
INC FUEL
softkeys to obtain the desired fuel remaining (GAL REM).
Resetting the fuel totalizer:
On the Engine Page, select the
RST FUEL
Softkey; this also resets the fuel remaining (GAL REM) to zero.
Figure 3-18 Fuel Calculations Group
Fuel Efficiency
Calculated Range
Calculated Endurance
Calculated Fuel Used
Set Fuel Remaining
A map feature related to the EIS Fuel Calculations is the Fuel Range Ring, which graphically illustrates the
aircraft’s remaining range based on the endurance (ENDUR), heading, groundspeed, and wind direction and
speed. The solid green circle represents the range until all the remaining fuel is depleted. The dashed green
circle indicates the aircraft range until only reserve fuel remains. Once on reserve fuel, the range is indicated
by a solid yellow circle.
The Fuel Range Ring shifts position in relation to the aircraft according to wind effects. For example, more
fuel is required for flying into a headwind, and the aircraft’s decreased range in that direction is indicated by the
Fuel Range Ring shifting toward the tail of the Aircraft Symbol.
The amount of reserve fuel (only for purposes of the Fuel Range Ring) is set on the Navigation Map Page
Setup Menu in terms of remaining flight time. When enabled the Fuel Range Ring appears on the Navigation
Map Page, the Weather Data Link Page, and PFD Inset Map.