PART I-DESCRIPTIVE
COCKPIT EQUIPMENT
31. Entry to aircraft
Entry to the cockpit is by means of a special ladder
supplied as ground equipment.
32. Hood operation
(a) The hood is opened or closed electrically by means of a
three-position OPEN-off-SHUT switch (18) under the
port coaming, provided that the clutch a engaged. The
clutch is operated by a knob (86) on the starboard
coaming; when this control is set to FREE the hood can
be moved by hand.
(b) The hood seal is inflated automatically when the hood
is fully closed with the switch at SHUT, provided that the
clutch control is set to ENGAGED.
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A.L.4 33. Hood jettisoning
Para. 33 Page 35 (a) Pre-mod. 347
The hood may br jettisoned by pulling the control handle (40) on the
port coaming panel. This action also operates a micro switch which
if electrical power is available, automatically lowers the gunsight.
The hood will not jettison cleanly unless it is fully closed and the three-
position switch is in the off position. An indicator on the port wall
shows that the jettison mechanism is locked. The pointer is on the
line when indicating safe.
(b) Post-mod. 347
The hood is jettisoned by gas pressure from a jettison gun acting on
two pistons which unlock the hood rail latches and then push the
hood upwards. This action may be in initiated by pulling the hood
jettison handle or will occur if either ejection seat handle is pulled.
The GGS is automatically lowered, if electrical power is available,
when the hood jettison handle is pulled but if either ejection seat
handle is used the GGS must be lowered manually before ejection.
(c) External emergency release
An external jettison control is on the port side of the fuselage. When
pulled it releases the hood thereby enabling it to be lifted clear
manually.
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34. Cockpit pressurization and heating
(a) Control of cockpit pressure is by means of a master
ON/OFF switch (13) and control of temperature is by
means of the spring-loaded selector switch (14) both 35
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