PART 1-DESCRIPTIVE
5. Fuel transfer system
Fuel from the internal wing tanks is fed by gravity to
the fuselage collector box. Fuel from the drop
tanks is transferred to the fuselage tank by air pressure
from the engine. The transfer commences when about
120 pounds have been used from the fuselage tank, the
rate of transfer being controlled by a float-operated valve
near the top of the tank.
6. Fuel system
(a) An electrically-driven booster pump, in the fuselage
tank collector box, delivers fuel through the L.P. cock
and filter to a single engine-driven H.P. pump. The
booster pump is controlled by a switch (49) below the
turn and slip indicator. A red light below the selector
dimer control (17) comes on when the pump is switched
off or when pressure from the pump is below a satisfactory
minimum.
(b) From the H.P. pump fuel is delivered through the throttle
and H.P. cock to the engine.
7. L.P. fuel cock
The low pressure fuel cock is controlled by a lever (17)(7) AL.1
marked FUEL OFF (aft)(down) FUEL ON (forward)(aft) AL.1
situated under then engine controls box on the cockpit
port wall. On no account should this control be used to
stop the engine except in an emergency.
ENGINE CONTROLS
8. Goblin Mk. 3 engine
(a) General
The engine is a centrifugal gas turbine developing 3,200 lb.
static thrust at seal level. The main engine systems
include:-
An electric starting system (see para. 11).
Relighting facilities (see para. 12).
A high-pressurised fuel system monitored by a baro-
metric pressure control.
Self-contained oil system.
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