| 摘要 |
Method for permitting the emergency bail-out from an aircraft having a frangible polycarbonate material canopy transparency by a person in an ejection seat. A flexible linear shaped charge is used to sever the polycarbonate canopy transparency in lieu of jettisoning the canopy. The charge, after ignition and explosion, severs the canopy transparency around the forward arch, back along the canopy side frame, and up the canopy to the rear of the seat to a point which leaves an unsevered section, of preselected length, of the canopy transparency. This unsevered section serves as a hinge and as a retaining means, and as the seat is ejected from the aircraft the severed section of the canopy transparency moves backwardly away from the seat, thereby precluding any contact between the canopy transparency and the person in the ejection seat.
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