Titanic tourist sub goes missing sparking search

[Open Ocean Diver]

Would have been rebreather technology using carbon dioxide scrubbers and oxygen cylinders inside.

Humans consume about 1 litre of oxygen per minute - or less if relaxed.

Rounding a bit, this means with 5 people they'll consume 5 litres oxygen/minute or 300 litres in an hour. For 96 hours (which was claimed) they'd need 96 x 300 = 28,800 litres of oxygen which is about 3 large cylinders plus replaceable scrubbers which the pilot would periodically replace after a set time.

When put like this one wonders where the oxygen cylinders were. Under the floor one imagines?

Any idea what this orange piece of equipment is? Also, seems amazing these electrical boxes with seal tight wire connectors keep the water out under extreme pressure.

 

[Manatee Diver]

Any idea what this orange piece of equipment is? Also, seems amazing these electrical boxes with seal tight wire connectors keep the water out under extreme pressure.

View attachment 789351

Those are probably the control systems, they are filled with oil to resist the pressure.

 

[lostsheep]

The difference is in the thread angle. Here in Europe (UK included) the thread angle is 60°.
In US the threads have a 55° angle...

BS, UNF / UNC is 60 degrees.

EDIT: Pretty sure NPT and NPST is 60 also.

 

[broncobowsher]

Would have been rebreather technology using carbon dioxide scrubbers and oxygen cylinders inside.

Humans consume about 1 litre of oxygen per minute - or less if relaxed.

Rounding a bit, this means with 5 people they'll consume 5 litres oxygen/minute or 300 litres in an hour. For 96 hours (which was claimed) they'd need 96 x 300 = 28,800 litres of oxygen which is about 3 large cylinders plus replaceable scrubbers which the pilot would periodically replace after a set time.

When put like this one wonders where the oxygen cylinders were. Under the floor one imagines?

I was running the same math. Doing it in my head I only got so far and needed to actually do it on paper and conversions... Just gave up when I realized it was nothing tiny nor extreme. I was really doing it to try and tell if it could be done with compressed O2 or if it needed to be liquid. Compressed works.

Not sure what scrubber material they were using. I want to say Lithium Hydroxide would probably be a good choice. I remember that being one of the stronger scrubbers but not something you want to be handling on a regular rebreather. I probably have specs in some book somewhere, if I can ever get all my stuff unpacked and organized.

 

[Russjstewart]

That

They didn't stop there trying to grab us back unto King Georges brand of bloody slavery. 1814? " In 1814 we took a little trip, along with Colonel Jackson down the mighty Missiissip....."

That would be the American war of 1812 you are referring to, the one where the US declared war on England, because the English embargo of France was hurting business, and the one where the US unsuccessfully invaded Canada 3 times. The battle of New Orleans hapened after the peace treaty had been signed

A Brief Overview of the War of 1812

The War of 1812 brought the United States onto the world's stage in a conflict that ranged throughout the American Northeast, Midwest, and Southeast, into...

www.battlefields.org

 

[Angelo Farina]

So you are saying there was actual fire? Or just heat, ?

So definitely implosion then a explosion ?

That should be easy to hear underwater.

The secondary explosion always occurs even when inside the volume there is just air, as an elastic response after the compression. It is an elastic bounce.
Of course, if inside the air volume there was ignitable material, a Diesel combustion occurs, making the following explosion more powerful.
When I computed the energy released by the implosion I only accounted for the potential energy due to water pressure. I could make a better evaluation taking into account the presence of 5 human bodies and some equipment inside the air volume, which definitely burned, at least partially (75% of human body is water which does not burn).

 

[Angelo Farina]

BS, UNF / UNC is 60 degrees.

EDIT: Pretty sure NPT and NPST is 60 also.

According to Wikipedia, ISO (metric), NPT and UTS (UNF, UNC) are 60°.
Withworth and British Standard (BS) are 55°:

Thread angle - Wikipedia

en.wikipedia.org

We usually refer to this as a Gas thread.
The DIN thread for regulators is G 5/8" BSP, so it has a 55° angle.

I apologize for the wrong information I posted earlier.
I corrected my previous post.

 

[kissonerga.ccr]

Not sure what scrubber material they were using

I am sure somebody would know – we’ve seen a good level detail on the hull construction already. I would think that the ergonomics of handling / swapping the scrubber inside the very confined internal space would call for something like ExtendAir cartridges, no? Just a thought

 

[kissonerga.ccr]

Non-apparent damage as the initial point of a failure is big problem for carbon fiber composites that are exposed to impacts or rough handling

^^That!^^

I once did a pre-buy inspection of a certain experimental airplane with most of its structure built from carbon fiber, fully monocoque design (all structural loads essentially borne by the skin). Real looker, fantastic thrust/weight ratio. As a prospective owner-pilot, I fell in love instantly. The word from my trusted mechanic, however, was that without a very expensive scan (likely to cost more than the airplane), we would have zero comfort as to the presence of any hidden damage, stress fractures, etc. That was the end of that love story

 

[Wookie]

^^That!^^

I once did a pre-buy inspection of a certain experimental airplane with most of its structure built from carbon fiber, fully monocoque design (all structural loads essentially borne by the skin). Real looker, fantastic thrust/weight ratio. As a prospective owner-pilot, I fell in love instantly. The word from my trusted mechanic, however, was that without a very expensive scan (likely to cost more than the airplane), we would have zero comfort as to the presence of any hidden damage, stress fractures, etc. That was the end of that love story

I have carbon fiber as pretty dashboard accents on my Tundra XSP-X, but that's the extent of my carbon fiber use, for just the reasons you stated. During a sailboat race in Key West while I was there, 2 boats were involved in a collision, one glass and one carbon fiber. They crushed and dumpstered the carbon fiber boat as they could never trust it again. When those boats were put int he travel lift, you'd think they were lifting an egg.