FK-Lightplanes FK 9 ELA Manual page 44

Airplane Manual FK 9 ELA FK Lightplanes
Revision 6 System Description page 7-9
The two fuel tanks are mounted behind the
pilots seats. The fuel valve (ROTAX only) is
located at the center console with positions
ON and OFF. The version with SMART
engine has no manual fuel valve because its
electrical injection fuel pump shuts off the fuel
flow in the line as soon as the ignition is
switched off. One fuel drain valve is located at
the lower fuselage aft of the main landing gear
for checking fuel purity.
Fuel quantity is indicated by a gauge at the
tank. After refuelling, this indication is
accurate after both tanks have levelled. This
can take up to 5 minutes.
Although the fuel cap has a water drain, it is
recommended to secure the cap from water
entering during strong rain by putting an extra
cover on top of the cap when the aircraft is
parked.
Additional Wingtanks (with fuselage tanks installed, optional)
Additional flexible fueltanks (capacity 20 Liter each) can be installed in the
wings of the FK 9. They are connected to the main tank and are filled and
emptied by using an electrical pump. The overflow / vent (23) is connected to
the vent system (8) of the main tank. Each tank has a fuel valve (19).
Handling of the wingtank:
To fill or empty the tank, the respective fuel
valve (19) must be open and the pump must
be switched to the "up" or "down" position.
Filling of the wintank has to be done on
ground with at least 20 liter of fuel in the main
tank. The wingtank is full as soon as fuel is
flowing via the overflow / vent (23) into the
vent system (8) of the main tank. Now the
pump has to be switched off and the valve
must be closed.
During flight, the fuel can be pumped out of
the wingtank as soon there is space of at least
20 liter in the main tank.