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DROGUE GUN.- The drogue gun (1) (fig. 6-20) (also shown in fig. 6-26) is mounted on the outboard side of the left beam. The drogue gun deploys the drogue parachutes during the ejection sequence. The drogue gun incorporates a 0.5-second delay to ensure that the ejection seat has cleared the cockpit prior to deploying the drogue parachutes. The gun consists of a body and a barrel assembly. The drogue gun body contains a time-delay mechanism, a spring-loaded firing pin, and two cartridges (primary and secondary). The barrel assembly contains a piston that is held in place by a shear pin. The barrel holds the primary cartridge and water seal. The primary cartridge is mechanically fired by a trip rod attached to the cockpit bulkhead. A chamber connected by a gas passage to the barrel holds the secondary cartridge and a gas-operated firing mechanism. This chamber ensures that actuation of either cartridge will fire the piston from the barrel. INERTIA REEL ASSEMBLY.- The inertia reel (12) (fig. 6-20) is mounted on the center cross member of the main beam assembly. During normal operation in the UNLOCK position, the inertia reel is free to extend or retract as required by the pilot's movements, but an automatic lock feature will prevent rapid forward movement. When the rapid movement ceases, the inertia reel ROCKET MOTOR INITIATOR.- The rocket motor initiator (4) (fig. 6-20) is mounted on the outboard side of the left beam. The rocket motor initiator consists of a cartridge chamber, a firing mechanism, and a coiled static line. The chamber is attached to the trombone fittings (9) by an outlet connector. The static line is coiled into a plastic container. The upper end of the line is attached to the quadrant lever and the lower. end is attached to the drogue gun trip rod. SEAT HEIGHT ACTUATOR.- The seat height actuator is mounted in the main beam assembly forward of the catapult gun. The actuator permits adjustment of the seat bucket within a vertical travel of approximately 5 inches. The seat height actuator consists of an electric motor and housing, gearbox, bearing housing, and jackscrew assembly. AIRCRAFT SEAT PARACHUTE.- The aircraft seat parachute container (13) (fig. 6-20) is located near the top of the main beam assembly. The parachute consists of a 22-inch controller drogue, a 5-foot stabilizing main drogue, and a 17-foot personnel parachute. The controller drogue deploys the -stabilizing drogue that decelerates and stabilizes the ejection seat during the initial phase of the ejection sequence. The personnel parachute provides the pilot with a safe means of descent. The parachute container provides support for the pilot's head during for-ward acceleration or wind blast. The personnel parachute is packed in the container first. It is secured by flaps and a closure pin that is attached to the personnel parachute withdrawal line. The withdrawal line attaches the main drogue to the apex of the personnel parachute. Then the main and controller drogues are packed. They are secured by four flaps and a closure pin, which is attached to the drogue withdrawal line. The drogue shackle secures the parachute withdrawal line and extender strap. Then the drogue shackle is secured in the scissor mechanism. Seat Bucket The seat bucket (14) (fig. 6-20) is mounted on the lower forward side of the main beam assembly. It is attached to studs on the seat bucket runners. The components described in the following paragraphs are related to the seat bucket. EJECTION CONTROL HANDLE.- The ejection control handle (16) is located on the front of the seat pan. It is the only means by which ejection can be initiated. The handle is molded in the shape of a loop and is connected to the sears of the ejection seat initiators. The seat initiators have two rigid lines that connect to the trombone fittings. An upward pull of the loop removes both sears from the dual initiators to initiate ejection. Either initiator can fire the seat. After ejection, the handle remains attached to the seat. The ejection control handle is safetied by using the ejection seat safe/ arm handle and safety pin. EJECTION SEAT SAFE/ ARM HAN-DLE.- To prevent inadvertent seat ejection, an ejection seat safe/ arm handle (18) is installed. To safety the seat, you must rotate the handle up and forward. To arm the seat, you rotate the handle down and aft. When in the ARMED position, the portion of the handle that is visible to the pilot is colored yellow and black with the word ARMED showing. In the SAFE position, the visible portion of the handle is colored white with the word SAFE showing. By placing the handle to the SAFE position, it causes a pinto be inserted into the ejection firing mechanism. This prevents withdrawal of the sears from the dual seat initiators. SHOULDER HARNESS CONTROL HAN-DLE.- The shoulder harness control handle (11) and seat height adjustment switch (10) are mounted on the left side of the seat bucket. The shoulder harness control handle is connected to the inertia reel. The seat height adjustment switch controls electrical power to the seat height actuator motor. MANUAL OVERRIDE HANDLE.- The manual override handle (17) is located on the right side of the seat bucket. The handle is connected to the lower restraint mechanism. It is also connected to the manual override initiator.
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