the extraction or deceleration load is released the unit
lever on the LH side of the seat bucket can be moved to
will revert to its normal free state.
the forward (locked) position, which will permit the
harness straps to retract, but prevent them extending.
A g-limiter assembly is installed within the RH end
cap. If the seat is subjected to a horizontal deceleration
When in the normal unlocked state, the occupant is
in excess of 0.7g, a weighted ratchet wheel attached to
protected against rapid forward movement under high
the RH end of the drive screw will prevent strap
g-loading by automatic locks, which respond to an
extraction. Reduction of deceleration below 0.7g and
excessive rate of strap extraction or aircraft
easing of any tension on the straps allows the ratchet
deceleration. On rapid strap extraction or aircraft
spring to reset itself and disengage the ratchet from
deceleration the unit mechanism will lock, and when
Figure 2-17.--Shoulder harness control system (SJU-17(V)1/A, 2/A and 9/A).
2-16