TM 1-1520-238-T-4
5–5
5–2
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
5–2
b. Main Rotor Blade Assembly.
The main rotor blade assembly (fig. 5–3) is attached to the main rotor
head assembly lead–lag link by two blade attachment pins. It is constructed of stainless steel and fiberglass and
consists of four stainless steel spars. The inboard end is the root section and is the attaching point for the blade to
the main rotor head assembly. The outboard end has a static discharge wick and a swept back tip. The rotor
blade assembly has an internal stainless steel balance bar in the leading edge, a nomex honeycomb core and a
stainless steel trailing edge. The trailing edge has a bendable tab on the outboard end which is used to obtain the
correct track path.
SWEPT BACK TIP
TRAILING EDGE
BLADE CROSS-SECTION
M58-122A
BLADE ROOT
STAINLESS STEEL
STAINLESS STEEL SPARS
LEADING
EDGE
STAINLESS STEEL
BALANCE BAR
DISCHARGE WICK
STATIC
ROOT
FITTINGS
BENDABLE
TAB
NOMEX HONEYCOMB CORE
4
3
2
1
Figure 5–3.
Main Rotor Blade Assembly
c. Tail Rotor Assembly.
The tail rotor assembly (fig. 5–4) consists of the tail rotor head assembly and four
tail rotor blades which are installed on the tail rotor gearbox output shaft, and is secured by three studs/nuts. The
tail rotor head assembly consists of a fork, four elastomeric bearings, and four hubs. Each hub has a stainless
steel strap pack that passes through the hub. The strap pack is attached to the tail rotor blade assembly and the
hub.
(1) Tail Rotor Blade Assembly.
Tail rotor blade assembly (fig. 5–5) is constructed of a stainless steel
leading edge. Eleven aluminum honeycomb stiffeners are bonded into the spar, and the blade skin is aluminum
with bonded doublers near the blade root fitting. A pitch horn which contains steel bushings, attaches to the pitch
link. Tip weights are attached under a tip cap at the blade outboard end. Weights are added or removed for
balance of the tail rotor blade assembly.
