Cirrus SR20 - Page 231

Cirrus Design Section 7
SR20 Airplane and Systems Description
P/N 21399-004 7-47P/N 21399-004 7-47
0 to 8.2 U.S. gallons and a green band from 8.2 to 28 U.S. gallons.
The indicators are calibrated to read 0 gallons when no usable fuel
remains.
Fuel quantity is measured by a float type quantity sensors installed in
the fuel tanks. Fluid quantity information is sent to the Engine Airframe
Unit, processed, and transmitted to the analog electronic Fuel
Quantity Gage and CAS window for display.
Fuel Flow
Fuel Flow is shown in the upper mid left corner of the Engine Strip as
both an analog electronic gage and as a digital value. The gage
pointer sweeps a scale range from 0 to 20 Gallons Per Hour (GPH).
The fuel flow value is displayed in white numerals below the gage.
Fuel flow is measured by a transducer on the right side of the engine
in the fuel line between the engine driven fuel pump and distribution
block. The fuel flow signal is sent to the Engine Airframe Unit,
processed, and transmitted to the Engine Indicating System for
display.
Fuel Totalizer and Calculated Information
Fuel totalizer calculations are located in the lower right section of the
ENGINE page and are separate and independent of the fuel quantity
gage and float sensor system. The fuel totalizer monitors fuel flow and
calculates fuel-to-destination, fuel used, fuel remaining, time
remaining, fuel range, and nautical miles per gallon. Upon system
startup, the fuel totalizer initial fuel screen appears and prompts the
user to enter the total fuel on board at start. The option to enter the
number of gallons added since last fuel fill and the ability to set fuel to
“Full” or to “Tabs” buttons is also available.
Revision A1