(fig. 2-14). The initiator consists of a mechanically
actuated sealed explosive device containing a
handle, four locking balls, a 10-foot wire lanyard,
a mechanical firing mechanism, a transfer booster
assembly, body shield, and a ball lock mechanism.
The 10-foot wire lanyard attaches the handle to
a mechanical firing mechanism. The firing
mechanism consists of a sear pin, cap, spring, and
firing pin enclosed in the body of the initiator.
The transfer booster assembly contains a
percussion primer, an initiation explosive charge,
and an output explosive charge. The transfer
booster assembly produces a detonation wave that
initiates the SMDC assembly, which is screwed
into the initiator’s outlet port.
When the initiator handle is pulled, the lock-
ing balls will retract and release the handle from
the shield. The handle and attached lanyard are
pulled the length of the lanyard (10 feet) from the
initiator. With the wire lanyard extended to its
full length, an additional 0.75-inch movement of
the handle will allow the firing pin to separate
from the sear pin. The firing pin, which is now
disengaged and under spring tension, strikes the
percussion primer, which is installed in the
transfer booster assembly. The primer ignites the
initiation and output explosive charges, pro-
ducing a detonation. The detonation wave initiates
the SMDC assembly, which is installed in the
outlet port of the initiator.
Figure 2-14.—External canopy and hatch jettison initiator.
2-18
