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2.14.1.2 Forward Tank. The forward fuselage fuel
tank is in the center fuselage, between the inlet ducts and
immediately ahead ofthe feed group. The forward tank
is partitioned into two bladder cells (Nos. 1 and 2) that
are interconnectedb y openp orts at the top for vent and
overflow purposes. Flapper valves at the base provide
for forward-to-aft fuel gravity transfer.
2.14.1.3 Aft Tank. The aft fuselage fuel tank group is
partitioned into four bladder cells @Jos. 5, 6, 7, and 8)
and a vent tank. The forward-most cell in the aft tank
group (cell No. 5) lays laterally across the center fuselage.
Extending aft are two coffin-shaped tanks that contain
two cells (Nos. 6 and 8) on the right side and one
cell (No. 7) plus an integral fuel vent tank on the left
side. The coffin tanks straddle the center trough area,
which contains the control rods. Sparrow missile
launchers, and electrical and fluid power lines. All fuel
cells in the aft tank group are interconnectedby one-way
flapper valves at the base for aft-to-forward fuel gravity
transfer.
2.14.1.4 Wing Tanks. There ,are integral fuel cells
in the movable wing panels between the front and aft
wing spars. Because of the wing-sweep pivot location
and the extensive span (20 feet) of the wing tanks, wing
fuel loading provides a variable aft cg contribution to
the aircraft longitudinal balance as a function of wingsweep
angle. Each wing panel consists of the integral
fuel cell, which is designed to withstand loads because
of fuel sloshing during catapulting and extreme rolling
maneuvers with partial or full wing fuel. Fuel system
plumbing (transfer and refuel, motive flow, and vent
lines) to the wing tanks incorporate telescoping sealed
joints at the pivot area to provide normal operation independento
f wing-sweep position.
2.14.1.5 External Tanks. Fuel, air, electrical,a ndf uel
precheck line connectors are under the engine nacelles
for the external carriage of two fuel tanks. Check valves
in the connectorsp rovide ana utomatics ealw ith the tank
removed. Although the location is designated as armament
station Nos. 2 and 7, no other store is designed to
be suspendedt heres o that the carriageo f external fuel
tanks does not limit the weapon-loading capability of
the aircraft. Suspension of the drop tanks and their fuel
content has an insignificant effect on the aircraft longitudinal
center of gravity, and, even under the most adverse
asymmetricf uel condition,t he resultantm ovementc an be
compensatedf or by lateral trimming.
See Chapter 4 for external tank limitations.
2.14.2 Fuel Quantity System. The fuel-quantity
measurement and indication system provides the flightcrew
with a continuous indication of total internal and
external fuel remaining, a selective readout for all fuel
tanks, independent low-fuel detection, and automatic
fuel system control features.
piikETo
prevent fuel spills from an overlilledvent
tank caused by a failed level-control system,
set the WINCVEXT TRANS switch to OFF
if the left tape readingr eaches6 ,200p ounds
or the right taper eadingr eaches6 ,600p ounds.
If either fuel tape reading is exceeded, the
aircraft shall be downed for maintenance
inspection.
Note
Fuel in the vent tank is not gauged.
ORIGINAL 2-42
NAVAIR Ol-F14AAD-1
Thequantitymeasurement systemusesdual-element,
capacitance-typefu el probes to provide the flightcrew
with a continuous display of fuel quantity remaining.
Fuel thermistor devices and caution light displays provide
a backup FUEL LOW level-indicating system, independent
of the capacitance-type gauging system.
Additionally, the pilot is provided with a BINGO set
capability on the fuel quantity indicator to preset the
total quantity level for activation of a BINGO caution
light.
Note
Fuel quantity system malfunctions that result
in erroneous totalizer readings will invalidate
the use of the BINGO caution light.
2.14.2.1 Fuel Quantity Indicators. The pilot and
RIO fuel quantity indicators are shown in Figure 2-30
with a definitive breakdown of tape and counter readings.
The white vertical tapes on the pilot indicator show
fuselage fuel quantity. The let? tape indicates fuel quantity
in the let? feed and aft fuselage; the right tape indicates
fuel quantity in the right feed and forward fuselage.
The “L” and “R” labeled counters display either feed
group, wing tank, or external tank fuel quantity on the
side selected using the QTY SEL rocker switch on the
fuel management panel, The rocker switch is spring
　
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