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Jim Yanik wrote:
"Gord Beaman" ) wrote in : "John R Weiss" wrote: "Gord Beaman" wrote... So, if armed pilots thwart only ONE hijacking... Quite true BUT. I worry about endangering those 'essential to flight units'. Think of the ever present danger of a loaded pistol in the comparatively small confines of an airliner cockpit for years and years, while a steel door (or two) is fairly innocuous. Also, as a matter of curiosity, what would you expect to happen if a 9MM or so slug were to go through one of the windscreens?. Aren't most glass and plastic laminated? (NESA?) Given the circumstances under which a FFDO's weapon would be fired, I suspect the damage done by an errant bullet would still be orders of magnitude less than the alternative. The program has been well thought out, the training has been given great reviews by virtually all involved, and the sole "hard" issues remaining are either administrative in nature or have to do with on-the-ground subjects. Windscreens are laminated, but I don't know if they all have glass components. The curved windscreen in the 747-400 appears to be all acrylic. Side windows are much thinner. A 9 mm hole in a side window would probably be noisy. Given the angles and other factors present, I can't accurately assess what would happen to a windscreen with a shot from the inside. I suspect that in many cases the bullet (especially if a frangible round) would be deflected, and the windscreen would maintain most of its integrity. Thank you John, a nice calm reasoned answer among all this hysterical hyperbole. So then, if they aren't laminated, how are they deiced?...a high percentage of military a/c use glass/clear conductive material/glass laminate called NESA. They apply a current to the conductive material and this keeps the screen quite warm...it also adds strength in some installations. -- -Gord. Would aircraft use any plastic films in the laminate,such as automotive glass uses? I don't know Jim...I do know that some use two sheets of safety glass bonded to some kind of conductive plastic material that they apply electrical current to for deicing. The glass becomes very warm to the touch. It's known as 'NESA windscreens'. -- -Gord. |
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