SMDC ONE-WAY TRANSFER
Two SMDC one-way transfers are located on
the pilot and copilot bulkhead. The SMDC one-
way transfer acts as a check valve or one-way
detonating transfer device. The SMDC one-way
transfer is a self-contained unit that houses a
sealed receptacle for dual-shaped charges. Any
detonation entering the inlet ports will transfer
to the outlet port. Any detonation originating
from the aft port (TACCO or SENSO) segment
of the SMDC one-way transfer will not transfer
forward. This would occur when either the
TACCO or SENSO elects to cut their respective
hatch. The remaining two windows and the
opposite hatch would not be affected.
SYSTEM OPERATION
The S-3A aircraft canopy and hatch severence
system contains two external and three internal
SMDC initiator handles (fig. 2-18). Actuation of
the pilot’s or copilot’s internal handle or either
of the two external handles severs the pilot and
copilot canopies, TACCO and SENSO hatches,
right and left upper wing-to-fuselage fillets, and
the right and left wing fillet supports.
Figure 2-18.—Emergency egress schematic.
2-22
