General > General Technical Chat

(discharged) Super capacitor in checked luggage on airplane?

<< < (6/9) > >>

Zucca:
Many thanks for all the answers!

I decided to build my own super cap bank here in USA and leave my friend in peace. I will ask him to bring me only a Kweld, which should be not a big problem....

MadScientist:
Don’t ask anyone anything. Just put it in your luggage and proceed as normal. I’ve brought super caps on checked luggage

tggzzz:

--- Quote from: MadScientist on January 18, 2023, 08:13:27 am ---Don’t ask anyone anything. Just put it in your luggage and proceed as normal. I’ve brought super caps on checked luggage

--- End quote ---

Before anybody bothers to reply to MadScientist, they may find it beneficial to look at his other posts (via the profile).

Here's a response to one I read 5mins ago; IMNSHO there are many others.
https://www.eevblog.com/forum/chat/ev-based-road-transportation-is-not-viable/msg4645195/#msg4645195

Robert763:

--- Quote from: bigfoot22 on January 18, 2023, 07:35:19 am ---
--- Quote from: Robert763 on January 16, 2023, 07:14:10 pm ---An electrolytic capacitor or supercapcitor will not burst at aircraft altitudes. There are hundreds if not thousands of them on every aircraft. the units used are the same as used in commercial equipment.
There is little or no gas in a capacitor to cause a pressure differential never mind excessive force. They burst in operation due to the electrolyte being boiled by a fault.
The reason for putting it in checked baggage is so a screener does not see it.

Robert G8RPI.

--- End quote ---

Depends on what kind of life the capacitor has lived. If they have been heated before externally via some other means besides the power on their terminals they could have produced a bubble internally which could cause a pressure differential and rupture the canister. If they are brand new then this is extremely unlikely.

--- End quote ---

Err,
If the pressure is generated by boiling the electrolyte the presure will reduce when the temperature falls. Even if there is some permanent chemical decomposition that produced gas, if it didn't burst the capacitor when it was hot it certainly isn't going to bust when it's cold. In anycase all modern capacitors are designed to safely vent any internal pressure.

Robert G8RPI.

Robert763:

--- Quote from: wraper on January 17, 2023, 09:53:53 pm ---
--- Quote from: Robert763 on January 17, 2023, 09:17:32 pm ---So why do you think it is OK to carry a prohibited item? They are prohibited for good reason. You either had a actual or potential weapon or something that was a risk to aircraft  / passenger safety.

--- End quote ---
There was totally no risk. It just falls into oxidizing agents category which is prohibited. Why? Because I needed this drying agent for gas analysis to do my job. As of dangers, if there was condition when it would pose some danger, it wouldn't be our main trouble as it decomposes at 250oC and there wasn't that much of it to begin with.

--- End quote ---

You may think there was no risk, but oxidizers are banned for a reason. Do you have qualifications in aviation safety? It's not your place to make that assesment. I am qualified to make that assesment and even then would never pack any prohibited item or substance on a aircraft. People have died because oxidisers were carried on passenger aircraft. Even the airlines are not allowed to carry smoke hoods etc as cargo on a passenger aircraft even though that same aircraft may have several installed as emergency equipment.
You do not have the right to put other peoples lives at risk.
If you needed the material for your work you should have arranged for a supply at your destination or had it shipped by a suitable freight carrier.
No excuses.

Robert.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod