PART 1-DESCRIPTIVE
(b) Oil system
Oil is carried in the engine sump, the oil capacity of which
is 10 pints. One pressure pump maintains a continuous
circulation through a filter to the engine and aircraft
accessories and to three two metering pumps which supply AL.1
oil to the front and rear bearings and the governor. AL.1
9. Throttle control
(a) The throttle levers (5) move in quadrants marked SUT-
THROTTLE-OPEN one on each pilot's engine control
box.
(b) A jet pipe temperature gauge and an r.p.m. indicator are
mounted on the left of the instrument panel.
10. H.P. fuel cock
The high pressure fuel cock is controlled by a lever (3)
marked OPEN (forward)-SHUT (aft) situated inboard
of the port throttle lever. This lever should always be
used to stop the engine.
11. Engine starting system
(a) The engine is started by an electric motor which rotates
the engine to the required light-up and self-sustaining
speed. The circuit for the electric current supply is
controlled by the interlinked starter and master switches
(32) at the lower centre of the instrument panel and the
starter circuit-breaker. The starting sequence is con-
trolled entirely by a clockwork time switch.
(b) The time switch is fully wound initially by pressing the
starter button for about two seconds. When the button
is released, current is supplied to the starter motor.
After 4 to 7 seconds, during which time the engine is
rotated slowly, the starter motor accelerates the engine
to a suitable r.p.m. (700-900) for light-up. At this speed
the igniter plugs light up the fuel and the starter motor
further assists the engine in acceleration.
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