Reply to Tourist submersible missing on visit to Titanic

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]Everyone dies. At least vaporizing yourself in an experimental carbon fiber tube is a pretty unique and interesting way to go. [/quote]

Vaporizing?

That implies heat. This sub was 10000 ft underwater in near freezing temperatures. Good luck vaporizing anything.

You must’ve studied science at trump university. [/quote]

The immense pressure of water entering the capsule would pulverize any living matter in the sub. We are talking surface of the sun temps. Gone. Nothing left. Literally E=mC^2[/quote]

Maybe a little PV=nRT too. [/quote]

A lot of T[/quote]

Exponentially increasing V = exponentially increasing T 
[/quote]

Typo: 
Exponentially increasing [u]P[/u] = exponentially increasing T

Followed by...
decreasing V = decreasing T 
[/quote]

It’s gruesome, but the Byford dolphin incident is as close as I can think of known outcome in somewhat similar circumstances. It was a decompressive, rather than a compressive incident, and it was from 9 atm to 1 atm. Other vessels have imploded, like the uss thresher, but no one survived and there is a lot of uncertainty about what really happened. Don’t read about Byford dolphin if you are at all squeamish. The titan sub imploded with an external pressure of 500 atm to 1 atm. It’s hard to wrap your mind around a reaction that happens magnitudes faster than human reaction. [/quote]
My God. How did you come to know about this incident?[/quote]

I took an ethics in engineering course as part of my mech engineering curriculum for undergrad. I posted earlier (like 30 pages ago) that we studied classic engineering mistakes. The Byford dolphin was not one that we spent a lot of time on, but was mentioned because it was just so awful. The design for the chambers was bad, prone to human error. The titan sub will definitely make the list of unethical engineering mistakes that cost lives. [/quote]

Really fascinating. Would love to know what institution this was but realize it may be too close to identifying. Thanks for the knowledge![/quote]

DP. In my engineering curriculum these types of failure were covered during a risk analysis course. [/quote]

That makes total sense. It’s the presentation of it in an ethics class that has me wondering about the institution.[/quote]

Many schools offer it.

You can even take it yourself: 
https://ocw.mit.edu/courses/esd-932-engineering-ethics-spring-2006/[/quote]

Aside, but the more I think about it, the more I am wondering what that specific course presented as the ethical issue(s) in the Byford Dolphin case. Based on the description here (and the little bit of reading I did) it sounds like a workplace safety incident--such that the issues would include the drilling company's culpability.

Was that the case or was there more to it?[/quote]

We didn’t cover it in my class, but I’m guessing they discussed the impact of human error on safety measures. After this incident they moved to a more updated design that was less vulnerable to human error. 
[/quote]

From the 1988 paper about the 1983 incident: 
[i]"In 1982, "Det norske Veritas" had issued revised regulations regarding the technical arrangement of diving spreads. One requirement was that the trunk should be impossible to open while it is pressurized. The Byford Dolphin was, however, not rebuilt because the regulations were not retroactive. The expert committee recommended that the system on board the rig should be rebuilt according to the new regulations. It was further suggested that the doors between the various chambers of such a system should be kept closed during an operation like this, or a device should be installed to ensure that they would close automatically in the case of a pressure drop."[/i]
[/quote]

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