Figure 3-32.Barricade installation.
wings and wrap about the aircraft (fig. 3-33). The
barricade installation then passes the force of
arrestment through the purchase cable to the
arresting engine. After arrestment, the barricade
and attached hardware arc discarded.
Currently, there are two types of barricades
(each has two configurations) available to the fleet.
Both types consist of three main all-nylon webbing
assemblies, placed one on top of the other and
bundled together to make up one barricade
installation (see fig. 3-32).
The first type or standard barricade webbing
assembly consists of five separate webbing systems
to make one main webbing assembly. The new
polyurethane semicoated barricade uses three
separate webbing systems to make one main
webbing assembly. Other differences between the
two types of barricade installations exist and will be
discussed as the need arises.
Each webbing system is composed of upper and
lower horizontal load straps (see fig. 3-32) joined
together at the ends by D-ring link assemblies on
the standard barricade and all-nylon velcro tie-down
straps on the semicoated barricade. (The rolled
edges of the upper and lower load straps of the
semicoated barricade are coated with polyurethane
to reduce wear and damage caused when the
barricade is dragged into position for use.)
Five vertical engaging straps, spaced 20 feet
apart, are connected to each upper and lower load
strap of each webbing system by means of sliding
fittings or loops in the end of each engaging strap.
The 20-foot load spacing between the vertical
engaging straps affords equalized loading of the
barricade during arrestment.
assembly, which is either five standard or three
semicoated webbing systems combined, effects
equalized loading every 4 feet along the wings
leading edge because of the staggered arrangement
of the vertical engaging straps.