PART 1-DESCRIPTIVE
the T.R. 1464 controller (14) is on the lower left-hand side
of the instrument panel, next to the "G" switch (45), and
the AUTO MANUAL control (44).
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|20. Other controls
A.L.1 |(i) The identification lights selector is controlled by a three-position
Para. 20 | switch (65) and operated by a pushbutton (76) both on the electri-
| cal panel. Switches for the pressure-head heater (61), R.I. compass
| (62), navigation lights (64) and landing lamp (75) are also on the
| electrical panel.
|(ii) Dimmer switches for U/V lights, instrument panel and floodlamp
| lights are on the cockpit port wall close to the ground/flight
| master switch. The emergency light switch is located in the same
| position.
|(iii) On later aircraft the R.I. (27) compass may be replaced by a G4F type
| with an E2A compass as a standby.
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A.L.3 COCKPIT EQUIPMENT
Paras. 21
& 22 21. Canopy
(i) The canopy is opened and close by the crank handle (52) mounted on the starboard
cockpit wall. A spring-loaded plunger locks it in any desired position when the
crank handle is released.
(ii) When closing it fully, the crank handle should be rotated as far forward as possible
to ensure that the plunger engages in the last locking hole, thus providing for the
efficient working of the canopy seal.
(iii)The canopy can be jettisoned in flight by operating the lever marked CANOPY
JETTISON (30) forward of the crank handle on the starboard cockpit wall.
(iv) A pushbutton on the outside of the fuselage, marked PRESS TO SLIDE CANOPY,
permits it to be opened from the outside.
22. Cockpit heating and ventilation
(i) The cockpit heating is controlled by a lever (54) marked HOT-CABIN BLOWER
AIR-COLD, mounted on the starboard cockpit wall, to the rear of the electrical
panel. Cockpit heating can only be used with the cabin blower in operation.
(ii) An adjustable cold air ventilator (11) is fitted on the cockpit port wall beneath
the coaming. The ventilator embodies a non-return valve to prevent leakage of
| air when the cockpit is pressurised. On later aircraft this ventilator will be
| positioned further aft in order to avoid its masking the Mach meter.
|(iii)Aircraft Mk. FB 9 will be a modified Mk. FB 5 and gives adequate cooling for
| the pilot when the cockpit is pressurised. This modification consists of the follow-
| ing alterations to the present cockpit layout.
| (a) The lever (54) and cold air ventilator (11) is deleted.
| (b) A wheel control marked OFF-COLD-MIX-OFF is positioned on the cock-
| pit port wall aft of the undercarriage emergency retraction switch (3).
| (c) A punkah louvre is positioned on the cockpit starboard side just aft of the
| electrical panel and derives its airflow from the wheel control.
| (d) A gallery pipe is positioned round the top of the cockpit.
| If the wheel control is rotated forward to the COLD position, the cockpit will
| become pressurised and cold air admitted. In either the MIX or HOT position,
| warm or hot air respectively will be admitted and the cabin will still be pressurised.
| If the louvre is turned down fully, all air will come through the gallery pipe, but
| as the louvre is turned upwards less air comes progressively from the gallery pipe
| and more from the louvre, until when, at its most upward position, all air entering
| the cockpit comes from the louvre whether cold, mixed or hot, according to the
| position of the wheel control. The airflow from the louvre can be directed at will
| by the pilot.
| In conditions of extreme humidity at low altitudes there is a likelihood of fog
| forming in the cockpit; this can be dispersed by rotating the wheel control back
| to the OFF position for a short time.
| In order to avoid overheating the unit, ground running as a preliminary check
| for correct functioning of the equipment, should not exceed 1 min. with the wheel
| control at COLD.
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