G
AUXILIARY UNLOCK
PNEUMATIC RELEASE
VALVE AND UNLOCK
SHUTTLE VALVE
ACCESS
G
H, J
CANOPY-LOCK
PNEUMATIC
AUXILIARY
ACTUATOR AND
PNEUMATIC
LOCK ACTUATOR
RESERVOIR
RESTRICTOR
D
FILLER MANIFOLD
G
CANOPY SWITCH
CANOPY PNEUMATIC
ACCESS
CONTROL MODULE
(NFO STATION)
D
CANOPY
E
LOCK ACTUATOR
CHECK VALVE
CANOPY
PNEUMATIC
TIMER
A
CANOPY PNEUMATIC
RESERVOIR AND
RESERVOIR CHECK
AND RELIEF VALVES
H
AUXILIARY PRESSURE
REDUCER AND
AUXILIARY PNEUMATIC
RESERVOIR AND RELIEF
VALVE
D
CANOPY
HYDRAULIC
ACTUATOR
C
CANOPY PNEUMATIC
CONTROL MODULE
F
LOCK ACTUATOR
RESTRICTOR
B
PNEUMATIC
SERVICING
CHARGING
MODULE AND
FILLER VALVE
AMEf0301
Figure 3-1.--Canopy pneumatic system components.
the RETR (locked) position, the timer check valve
cylinders. The canopy hydraulic actuator is accessible
reseats.
from the NFO station when the canopy is opened and
the NFO ejection seat is removed.
LOCK ACTUATOR RESTRICTOR
CANOPY-LOCK PNUEMATIC ACTUATOR
The lock actuator restrictors (fig. 3-1, Item G)
The canopy-lock pneumatic actuator (fig. 3-1, Item
regulate the speed of the canopy-lock pneumatic
G) locks and unlocks the canopy. It operates with
actuator during locking and unlocking of the canopy.
nitrogen pressure from the canopy pneumatic control
module and the canopy pneumatic timer. The actuator
CANOPY PNEUMATIC TIMER
moves the canopy forward or aft the RETR (locked) or
EXT (unlocked) position, respectively. When the
The canopy pneumatic timer (fig. 3-1, Item E)
actuator piston reaches its full EXT (unlock) travel
permits pneumatic pressure flow from the canopy
limit, the timer check valve permits pneumatic-pressure
pneumatic control module to the lock side of the
flow from the canopy hydraulic actuator. While the
canopy-lock pneumatic actuator and vents or
canopy closes, the timer check valve vents pneumatic
pressurizes the canopy hydraulic actuator shutoff
pressure from the canopy hydraulic actuator through
valves. The last closing motion of the canopy actuates
the canopy pneumatic control module. When the
the timer.
canopy-lock pneumatic actuator piston moves toward
3-2
