SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3M „Performance“
FLIGHT MANUAL
March 2019
CS 22
Revision –
4.2.3.7
Calibration of the fuel quantity indicator for the fuselage fuel tank
If the fuel grade is changed, e.g. from Avgas to Mogas, or if there is any other
suspicion of an inaccurate indication of the fuel content in the fuselage tank, the
fuel indication must be recalibrated in the operating unit.
Calibration procedure for the indication of the fuel quantity:
- Set up aircraft on level ground, fuselage on main wheel and tail wheel or tail
dolly, align wings horizontally.
- Fill the fuselage tank completely (visual inspection in the expansion container in
the baggage compartment),
- With the engine retracted (limit switch “Retracted” must be actuated), turn the
rotary switch through the main menu of the operating unit into the FUEL MENU
pages, select there CALIB. MAIN TANK.
- The calibration is started by pressing the rotary selector switch.
- If the display shows the new tank calibration factor (e.g. [94]), the calibration is
successfully completed.
After returning to the main menu, the display of the fuselage tank content is set
to 13 L.
If the tank calibration factor is not displayed, the tank calibration must be repeated.
The error message TANK CALIB. FAILED (Tank calibration failed) occurs if the
calibration would result in a tank calibration factor with a deviation of more than
30% from the original value. This may occur, for example, if the fuselage tank is
not fully filled or if the fuel in the fuselage tank is moving during calibration.
The error message must be confirmed by pressing the rotary selector switch.
In this case, no calibration is performed and the previously existing calibration
factor continues to be used. Before the next calibration attempt, check that the
above requirements for the calibration procedure have actually been met.
Caution:
A tank calibration with a partially filled fuselage fuel tank or a failure to carry
out the tank calibration when changing the fuel grade leads to false readings
of up to 30%.
The displayed tank content may be larger than the actual tank content!
Содержание Ventus-3M Performance
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