JETTISON CANOPY GENERATOR

During emergency ground egress, without seat ejection, the explosive signal provided by the canopy jettison initiator is blocked from entering the SMDC lines of the seat ejection system by the one-way explosive transfers. As previously mentioned, during emergency ground egress, seat ejection, or ditching condi-tions, the canopy may be jettisoned by pulling either an internal or external canopy emergency jettison initiator handle. The safe-and-arm seat ejection module for use if the lanyard-operated firing mechanism of the module fails. This signal positions an explosive charge withinįigure 2-4.- Canopy emergency jettison initiator handles. This fires the initiator to send an explosive signal through a 1.1-second time delay. lanyard for the backup initiator becomes taut and actuates linkage to remove the backup initiator sear. As the canopy leaves the aircraft, theįigure 2-5.- Canopy external jettison initiator handle.

JETTISON CANOPY GENERATOR

The canopy gas generator produces high-pressure gas that forces the canopy hydraulic actuator shaft upward, ballistically jettisoning the canopy. Expanding SMDC lines, routed through the latch hooks, break the canopy latch frangible bolts and allow the hooks to rotate upward, releasing the canopy. This sends an explosive signal through shielded mild detonating cord (SMDC) lines to the safe-and-arm firing pins, canopy-separation charge expanding SMDC, and canopy gas generator. A system initiator is fired by sear removal. System Operation Pulling the pilot or NFO face curtain or secondary firing control handle initiates seat ejection (fig. 2-4), located inside the aircraft or externally (fig. The canopy may be jettisoned without initiating seat ejection by pulling a canopy emergency jettison initiator handle (fig. Through the use of pyrotechnics, the canopy is automatically un-locked and jettisoned when seat ejection is initiated. The canopy must be clear of the cockpit before seat ejection. Canopy emergency jettison systemĭuring emergency conditions that require emergency ground egress, seat ejection, or ditching. 2-3) jettisons the canopy clear of the cockpitįigure 2-3. The emergency canopy jettison system (fig.

Jettison canopy