electrically operated cartridges. The sequencer controls
cartridge to retain the rocket in the barrel. The cartridge
drogue deployment and release, personnel parachute
flange will shear to permit ejection of the rocket during
deployment, and the man/seat separation. Timings vary
with altitude and airspeed. An external test receptacle is
Electronic Sequencing System
provided for periodic testing of the sequencer.
THERMAL BATTERIES.--Two thermal bat-
The electronic sequencing system consists of an
teries supplying power for sequencer operation are
electronic sequencer, two thermal batteries, two pitot
mounted together in a manifold on the LH main beam.
assemblies, two sequencer start switch assemblies, and
the associated electrical wiring.
To provide system redundancy, each battery is
initiated independently by a manifold-mounted
SEQUENCER.--The sequencer (fig. 2-11) is
gas-operated firing mechanism. Both firing mech-
attached across the front of the seat main beams below
anisms are initiated by gas pressure from the seat
the parachute assembly. It is connected by pipes to the
initiator cartridges or the aircraft command sequencing
pitot assemblies and by electrical wiring to the thermal
batteries, the sequencer start switches, and the
Figure 2-11.--Electronic sequencer.