This assures system redundancy by providing dual-line initiation for the canopy-separation charge. Explosive manifolds, within SMDC line runs, allow output SMDC lines to be initiated from one SMDC input. It is an explosive strip embedded into the canopy outer layer, implemented to enable the controlled shattering of the canopy so that a safe egressing path can. Inert connectors joining the SMDC lines transfer the explosive stimuli through bulkheads, straight runs, tee connections, and 90-degree bends. 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. Delivery Schedule: 705 DADC Paper copies of the solicitation will not be provided by the Navy.
Canopy jettison mod#
The safe-and-arm seat ejection module for use if the lanyard-operated firing mechanism of the module fails. NSN: 1377- 0 Quantity: 276 Unit of Issue: MK 109 Mod 1 Canopy Jettison Rocket Motor (CJRM) FAT, LAT, and CDRLS are FOB Destination.
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.
Canopy jettison 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. I am labeling it 'Maintenance Only' mostly because I think that is the only practical purpose for having it.
The canopy must be clear of the cockpit before seat ejection. Canopy Jettison I put my jettison handle under the panel at the top of the circuit breaker panel. 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.
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