Airplane Factory SLING 2
Pilot Operating Handbook
Page | 9-9
DC-POH-002-X-B-6
Revision : 2.6
Fuel feed is through two electric pumps. Each pump has a parallel installed
check valve (NRV).
The fuel feed from the fuel pumps enters a fuel pressure controller
mounted on the engine, where after it splits into two separate branches,
one for each carburettor. A fuel pressure sensor is connected to one fuel
pipe branch. A fuel flow sensor is connected in the one fuel pipe branch.
The sensors are connected to the EFIS via the RDAC unit.
Fuel return lines return excess fuel supplied by the fuel pump(s) to the fuel
tank in use.
Main fuel pump
The main fuel pump is connected to the main bus. The pump cannot be
operated when power to the main bus is unavailable.
Auxiliary fuel pump
The auxiliary fuel pump is connected to the output of the charge system
rectifier and via the charge relay to the main battery and main bus (as long
as the main bus is powered (i.e. the master switch is on) and the charge
relay is energised).
If the charge system fails the auxiliary fuel pump can be operated via power
from the main bus, provided that the charge relay remains energised / is
not failed, the master switch is on and there is no failure of the power supply
to the main bus.
If power to the main bus is unavailable, or the charge relay fails, the charge
system is disconnected from the main bus and battery. In this case the
Summary of Contents for Sling-2
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