User manual

Bronco X
Aerosoft GmbH 2012
26 27
Fuel System
The fuel system consists of two inboard, two outboard tanks and one
center tank plus an optional external fuel tank. Fuel from the outboard
tanks flows to the inner tanks and then both inner tanks feed the
center tank all by gravity. From the center tank is pumped by the
engine driven boost to the low/high pressure fuel pumps. These supply
the fuel control units that feed the engines. Fuel from the optional
external tank is pumped with an electrical transfer pump to the centre
tank. The external fuel transfer switch operates the transfer pump at
about 845 pound an hour. When all internal tanks are full and the
transfer pump is used the fuel is dumped via the wing tank vents.
Normally the transfer pump is started when the wing tanks are
partially emptied and then used for half an hour. Do not forget to
switch it off, there is no indication about the quantity of fuel in the
external tank!
CAUTION: As part of the system uses gravity it has only limited
inverted capacity.
The fuel quantity indicator indicates the weight of the fuel in pounds x
100 in part of the fuel tanks depending on the setting of the fuel
gauge select switch. In the FEED position it shows the weight of the
fuel in the centre feed tank. At INT setting the weight of the fuel in
the internal wing tanks is shown Note the 230 gallon external tank
does NOT have any indication so the EXT setting will show zero., the
EXT setting on the fuel gauge does not function with this tank. The
fuel gauge test button will rotate the needle fully clockwise and
counter clockwise to indicate full freedom of movement.
TANK CAPACITY USABLE
GALLONS POUNDS GALLONS POUNDS
WING OUTBOARD 75.3 489 72.4 471
WING INBOARD 134.5 874 130.6 849
CENTER / FEED 37.1 241 36.0 234
EXTERNAL 230 1494 220 1427
TOTAL 476.9 3098 459 2981