the load straps. They are then attached to the tensioning
pendants by a pelican hook assembly. During an
emergency arrestment, the force of the aircraft
engaging the barricade breaks the multiple-release
straps, releasing the barricade from the tensioning
pendants allowing it to fall over the aircraft. The energy
of the engagement is then transferred from the
barricade through the purchase cable to the arresting
engine.
BARRICADE STANCHIONS
Barricade stanchions house the winches that
tension and support the barricades. They further
provide the structure on which the barricade is raised or
lowered.
Except for differences of location and position of
the actuating apparatus—deckedge, above or below
deck—port and starboard stanchions are identical. The
port stanchions with their actuating apparatus are
described in this chapter. Barricade stanchions (fig.
3-39) are welded steel, tray-shaped assemblies that
consist essentially of a base on which is hinged the
frame. Each barricade frame contains the winches,
sheaves, and pendants used to tension the upper
barricade webbing load strap.
Each barricade stanchion is provided with a slot, at
the top of the inboard side, through which passes the
upper tensioning pendant. The frame moves as a hinge
around the two stanchion shafts, the barrel of the hinge
being the base and the knuckles of the hinge being the
hubs of the stanchion frame. The two shafts act as the
pins of the hinge. The actuating arm is keyed and
pinned on the outer shaft and is pinned to a holder on
the stanchion. Rubber bumper pads are bolted in the
deck recess to cushion the shock of lowering the
stanchions.
3-38
STANCHION LATCH ASSEMBLY
COUNTERBALANCE
SPRING ASSEMBLY
CYLINDER
ASSEMBLY
DECKEDGE
CONTROL VALVE
PRESSURE GAUGE
STANCHION
POWER
PACKAGE
ABEf0339
Figure 3-39.—Barricade stanchion installation.
