www.keepandbearguns.com
Ezen a linken megtalalsz egy olyan cikket, amely a pilotak felfegyverzeset elemzi. Ha nem tudsz angolul, szolj, es leforditom.
A szoveg a fedelzeten levo fegyverekkel foglalkozik, es a hozzajuk fuzodo mitoszokat cafolja.
Airplanes & Guns:
Myths and Reality
from Angel Shamaya
Founder/Executive Director
September 19, 2001
MYTH #12
"We don't want the plane to depressurize at 30,000-feet because someone thinks they saw a hijacker." -- Representative Greg Walden
(quoted here, his website, his email address) 1) Concealed carry permit holders are among the most lawful people in our society. Anyone who has a valid report of a concealed carry permit holder opening fire "because they thought they saw" a criminal is invited to provide credible information for verification (as opposed to emotion-rich but fact-poor rhetoric).
2) Are we also to believe that a government employee or Sky Marshal would behave differently than a citizen if "they think they see a hijacker?" If so, why? What abilities of discernment have been bestowed upon government employees and Sky Marshals that cannot be bestowed upon citizens and pilots?
3) People who oppose the right to self-defense on the ground ought not even be considered in this discussion, because their anti-gun fairy tales have already been disproved on the ground. Cities where concealed carrying of firearms have been decriminalized are safer than they were before restrictions were lifted. (See More Guns, Less Crime by Professor John Lott.)
On Depressurization
from Dan Todd
Licensed Aircraft Engineer for 20 years
Lead Technician for a Major Airline
On the overall question: "Is shooting hijackers on aircraft an appropriate thing to do considering the risk of damaging the operational integrity of the aircraft," the answer is "Hell Yes." I've been a licensed aircraft mechanic for over 20 years, and am the Lead Technician for a Major Airline. I know aircraft. I've been an active shooter for a lot longer than that and I know firearms and ammunition too. So I suppose I'm entitled to an opinion on the matter. By the way, there is special ammunition just for this application.
First of all, there already is a "hole" in the aircraft, for regulating the cabin pressure. It's called the outflow valve. It modulates to maintain desired cabin pressure, in response to signals from a cabin pressure controller, which responds to inputs from a selector panel in the cockpit, all automatic when it's all working normally.
There's also always pressurized cabin air leaking out past door seals and a few other places. Remember, the airplane is pressurized by a constant flow of compressed air into the cabin from the engines (via the pneumatic systems and the air conditioning systems). If one round, or two or three for that matter pierce the skin, it's not necessarily catastrophic; air will go whistling out the hole, and the outflow valve will close a little further to maintain the desired cabin pressure. Now if the bullet hits a cabin window, it could I suppose take out pane completely and then there would be a real problem. That would be enough air whooshing out fast enough to cause a complete depressurization, someone could be extruded through the open window frame (it has happened) and some people wouldn't get their masks on fast enough to keep from passing out. Emergency exits cannot be opened at altitude. About 8 psi would be a typical differential pressure at altitude, and the doors are plug doors, meaning that to get one open it has to move inside the airplane first, so it's 8 lbs X too many square inches to be physically possible.
On bomber aircraft, the crew compartment is pressurized, the bomb rack and bay area is not. The pilot compartment on fighter aircraft is pressurized. With regard to bullets penetrating aircraft skin, well, the skin isn't made to stop bullets, but putting a small hole in the fuselage isn't necessarily a big deal, hitting a control cable would be undesirable but again, not a for sure disaster. Same with a hydraulic line, same for an electrical cable. In summary, it's pretty tough to down a transport category aircraft with small arms fire. Boeing's 737s, 757s and the rest are very much like bulldozers with wings on them in that regard.
Dan Todd, Licensed Aircraft Engineer for 20 years
Lead Technician for a Major Airline
September 17, 2001
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On Depressurization
from David M.
Licensed Aircraft Engineer
One or even several bullets puncturing the pressure cabin wall would be hardly noticeable and the aircraft's pressurization control would easily cope with the slight loss of air. The likelihood of a single bullet causing a massive structural failure is so remote as to be insignificant. It is quite possible that gunfire in the cockpit or passenger cabin could cause damage to fuel, hydraulic or electrical lines but again it would have to be unlucky to cause a major problem that could not be survived.
Commercial jets pressurization systems are designed to maintain the cabin at a pressure altitude of not exceeding 8 or 9 thousand feet no matter how high the plane is flying, and they do this with a typical differential of maximum 6 to 9 psi. Rapid depressurization is uncommon and systems warn of creeping depressurization because at a cabin altitude of over 15000 feet blackout is likely to occur but by then the oxygen masks will have long before deployed typically at around 10 to 12000 feet pressure altitude.
I believe I read somewhere that a Boeing 747 can lose five cabin windows and maintain cabin pressure so I personally would not be worried about a few potentially life saving shots being fired by a sky marshal - what effect that might have on ones hearing is another matter entirely!
Regards, David.
September 17, 2001
