PART I-DESCRIPTIVE

	       engine r.p.m. by changing the setting of the fuel flow
	       regulator.  The throttle lever grip contains the air brakes
	       control (46) the gunsight caging pushbutton (47) and the
	       press-to-transmit button (63).  The gunsight manual rang-
	       ing control is also incorporated in the grip.

	   11. Engine master switch

	       The guarded engine master switch (81) on the right con-
	       sole controls the L.P. cock, and completes the circuits
	       controlling ignition (during starting only) and the fuel
	       booster pumps.

	   12. Ignition

	       The ignition required for starting is supplied to the igniter
	       plus when the engine master switch is ON, the battery-
	       starter switch (80) is held momentarily at STARTER,
	       and the throttle is moved from the OFF position.  The
	       ignition is disconnected when the starter cuts out.

	   13. Starting controls

	       The battery master switch (80) operates the starter when
	       held momentarily at STARTER, and the starter cuts out
	       when engine speed reaches 23 per cent. approximately.
	       The starter may be de-energized by means of a button
	       (79) marked PUSH TO STOP STARTER on the right
	       forward console.  This button should not be used to dis-
	       engage the starter after normal starts.
	       NOTE.-An external 28.5 volt source capable of supply-
		     ing 1,500 amps. must be connected to both
		     external plugs for starting (see para. 16 (iv) (b)).
		     Starting on the internal batteries must not be
		     attempted.

	   14. Relighting switch

	       A relighting switch (83) marked EMERGENCY IGNI-
	       TION is on the right console and is used to restart the
	       engine in flight.  When the switch is on, it connect the
	       battery to the ignition system, providing the battery
	       switch is at BATTERY and the throttle lever is advanced
	       from OFF.  The switch should only be left on until igni-
	       tion occurs, it should not be left on for longer than 3
	       minutes or used too frequently as this may damage the
	       ignition system.

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