General > General Technical Chat
(discharged) Super capacitor in checked luggage on airplane?
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wraper:

--- Quote from: amc184 on January 19, 2023, 06:52:19 am ---I don't want to get involved in the discussion about safety, but the plane the crashed because of on-board oxidisers might be this one:
https://en.wikipedia.org/wiki/ValuJet_Flight_592

--- End quote ---
It was because of improperly handled oxygen generators by airlines company.

--- Quote ---The National Transportation Safety Board spent more than a year working up an accident report that ruled the crash had been caused primarily by a contractor’s mishandling of the packaging and shipment of oxygen generators in the cargo hold.
The oxygen generators had been loaded without the proper safety caps, causing them to ignite in the cargo hold and trigger the deadly fire, the report said.
Investigators identified three employees of SabreTech, the maintenance contractor for Valujet at the time, who had a role in mishandling the oxygen generators, according to the FBI. Two of those employees were criminally charged but later acquitted.
--- End quote ---
What I brought is chemically stable, unlike hydrogen peroxide for example. Unless you throw a bottle into a strong fire, nothing will happen. Also unlike gas generators which contain components to react, there was nothing it can react with.


Robert763:
Well you have not named the chemical so I don't know why I should bother.
Valuejet flight 592.
But it does not have to be a fireball accident. spillage of even common chemicals can cause damage to airframe and systems causing issuews later. At a lower level a diversion costs money delays passengers and increases risk due to non-normal operation.

EDIT:
Note that a serious incident or accident normally requires a chain of events and / or actions. A oxidizer alone may not cause a crash but if something else is wrong it may be a vital part of the chain. Banning such items is a important means if refucing the risk.
Google James Reason swiss cheese model
You made an extra hole in the cheese.
tggzzz:

--- Quote from: Robert763 on January 19, 2023, 07:51:07 am ---Well you have not named the chemical so I don't know why I should bother.
Valuejet flight 592.
But it does not have to be a fireball accident. spillage of even common chemicals can cause damage to airframe and systems causing issuews later. At a lower level a diversion costs money delays passengers and increases risk due to non-normal operation.

--- End quote ---

Just so. Even water is a potential problem.

In the 757 cockpit after a flight landed my I and my daughter were chatting to the pilot (he even let her sit in his chair :) ). He mentioned that he had once had to delay a flight because water was leaking from a package containing live elvers. Elvers are a particularly edge case: if fresh water then no problem, if salt water then he would have grounded the aircraft for inspection. (it was fresh water)

And, of course, mercury has "interesting" and subtle effects on aluminium alloys.


--- Quote ---EDIT:
Note that a serious incdent or accident normally requires a chain of events ot actions. A oxidizer alone may not cause a crash but if something else is wrong it may be a vital part of the chain. Banning such items is a important means if refucing the risk.
Google James Reason swiss cheese model
You made an extra hole in the cheese.

--- End quote ---

Precisely.

Any arguments to the effect that "I ran into a road without looking and wasn't knocked down" should be ignored. There's a good argument the person making such arguments should be ignored too.
Thunderer:

--- Quote from: james_s on January 19, 2023, 03:09:03 am ---Commercial airliners are pressurized to an equivalent pressure of 6,000-8,000 ft, this is called cabin altitude.

--- End quote ---
I see now, you are right.
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