bucket. The seat height actuator rod is attached
upper cross member. It retains the drogue
to the lower sliding runner. The components
parachutes after they are deployed and prevents
attached to the main beam assembly are discussed
deployment of the personnel parachute until a safe
in the following paragraphs.
altitude and g-force is reached. The scissor
mechanism has a moveable jaw, which is held in
TOP LATCH MECHANISM.— The main
the closed position by the shackle plunger of the
beam assembly is secured to the catapult by the
top latch mechanism, which is located on the
upper end of the left beam. The mechanism
consists of a housing with a spring-loaded plunger.
The inboard end of the plunger is shaped to
engage the catapult inner barrel. The outboard
end is threaded to accept the top latch handwheel.
When the handwheel is installed, it permits
removal of the ejection seat from the catapult.
SCISSOR MECHANISM.— The scissor
mechanism (25) (fig. 6-20) (also shown in fig. 6-21)
is located on top of the main beam assembly
upper body of the time-release mechanism.
TIME-RELEASE MECHANISM.— The
time-release mechanism (TRM) (23) (fig. 6-20)
(also shown in fig. 6-22) is mounted on the out-
board side of the right beam. The TRM
automatically releases the drogue parachutes,
deploys the personnel parachute, and releases the
pilot from the ejection seat at the proper time in
the ejection sequence.
The TRM consists of a time-delay mechanism,
barostat assembly, barostatic g-controller, spring-
loaded firing mechanism, connecting rod,
Figure 6-22.—Time-release mechanism.
6-31
