Missing Titanic Submersible

Attachment 462970

So.

Spend a half mill

To go in some rando homemade carbon tube with titanium end caps. At depth. Serious depth. Just to see the dead titanic?

Wtf.

Get a life.
Do something. Other than Instagram snap chat gram fuckery.

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Originally Posted by BmillsSkier

I can respect that. I’m only going off what I’ve seen personally and my interactions with them.

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Lake Lanier?

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Originally Posted by highangle

Lake Lanier?

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I wouldn’t head out on Lake Lanier in a frigate.

That lake exists solely to kill people.

https://www.cbc.ca/news/canada/newfo...logs-1.6887770

now Canada is getting in on the action

Is this sub story just another chapter in the ignore the experts / just do your own research / throw money at a problem / rules and regulations are just red tape there that stifles innovation

Could be cross posted to the Elon thread.

Aw, hell no...


https://youtu.be/O-8U08yJlb8

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Originally Posted by frorider

I think you meant to say purview not purlieu my good sir.

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Mmm, purloo

Attachment 462994

It’s getting really hard to keep up with the memes now that they’ve all merged the gentleman submersible, the orcas, and now the Russian half-revolt.

I just hope the whales win.

#metoo

..........https://uploads.tapatalk-cdn.com/202...ec5f50b6a4.jpg

Attachment 463009

.

This was a funky outfit in the big picture, but also in the small details...

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Over cigars one night, Rush told Weissmann that he got the carbon fiber for the Titan’s hull at a big discount because it was past its shelf-life for use in airplanes, Weissmann said. But Rush reassured him it was safe.

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Fucks sake, was there a corner anywhere at all that this guy didn't cut?


(Oh, and my brother just called me to say that Rush was his classmate in middle school in SF; said he was a nice kid.)

Has this made it here yet?

Over cigars one night, Rush told Weissmann that he got the carbon fiber for the Titan’s hull at a big discount because it was past its shelf-life for use in airplanes, Weissmann said. But Rush reassured him it was safe.

Heh.

What if the last sound on the recording before the catastrophe is the toilet flushing?

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Originally Posted by Danno

Aw, hell no...


https://youtu.be/O-8U08yJlb8

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There's no way in the world I'm getting in that fucking thing.

This one belongs inSprocket RocketsAttachment 463059

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Originally Posted by ötzi

There's no way in the world I'm getting in that fucking thing.

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It wasn't even a vessel. It was a tube with electronics attached to it. I mean WTF? Five people crammed into something the size of a bathtub. You sit on a metal floor. You can't stand up. You can't crawl. You can't even stretch your legs and the "bathroom" is a hole.

The guy was a billionaire. Couldn't he have built something more civilized? Are all deep submersibles like this?

Looks like Buck Rogers' space ship.

I wonder if they had drugs on board in case someone had a panic attack.

Did they do psych evals of passengers or was the only requirement that your check cleared?

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Originally Posted by KQ

I wonder if they had drugs on board?

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Could possibly justify the 250k pricetag.

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Originally Posted by BobMc

Could possibly justify the 250k pricetag.

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Seriously. If 250k doesn't get you a proper seat it ought to at least help you get comfortable.

Watching them get sealed into that tube of death in the video was sobering.

They had cookies though


Sent from my iPad using TGR Forums

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Originally Posted by ticketchecker

They had cookies though


Sent from my iPad using TGR Forums

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Someone in this submarine approves.

https://youtu.be/LeYzjzl7cLI

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Originally Posted by Danno

Aw, hell no...


https://youtu.be/O-8U08yJlb8

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These “influencers” are insufferable. Guy should go back to making videos of unboxing a pair of binoculars or whatever.

I didn't find that guy insufferable at all. Shrug.

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Originally Posted by Danno

I didn't find that guy insufferable at all. Shrug.

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He was a bit too goofy for me. I would find him exhausting to be around but I suppose that's just my age showing. Def. would have been telling him to get off my lawn [emoji41]

I’m with Harry, had to fast forward a lot so I didn’t have to hear the forced optimism about everything, kid was insufferable.

It struck me when he said he was told it would maybe take 14 hours to come back up, my god that is crazy. Also the scene where they were trouble shooting the control system that randomly crashed, big hell no there. If I were crazy enough to go and sat in that meeting that would of been it.

Couldn’t pay me 100 billion to ride that even before the benefit of hindsight.

I made it 1 minute and shut it off. Insufferable twat

New conspiracy is the wreath he threw in the ocean got sucked into the submersible engine and that’s what sunk them.

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Originally Posted by muted reborn

New conspiracy is the wreath he threw in the ocean got sucked into the submersible engine and that’s what sunk them.

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Definitely was the wreath’s fault it was built from substandard material

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Originally Posted by Supermoon

Definitely was the wreath’s fault it was built from substandard material

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Perfect!

Attachment 463126

Not to speak too harshly of the dead, but the guy did pretend to be a pilot.

DH Comet 1

Aloha 243 B-737/2

Pressure vessel cycle fatigue is no mystery. Nor is Materials Science Engineering. Hell, even geometry.

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Originally Posted by KQ

The guy was a billionaire. Couldn't he have built something more civilized? Are all deep submersibles like this?

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They are likely all like that. Imagine a tube cut in half lengthwise - pressing the two halves together, the tube wall at the two cuts is what resists the pressure. Doubling the diameter doubles the surface area acted on by the pressure, so the wall needs to be twice as strong/thick. Doubling the diameter quadruples the area of the endcaps, so now there's 4 times the force acting axially on the tube, but the wall "ring" area also doubled, so the wall still needs to be twice as thick. The end caps work similarly. If you track all the doublings, the volume of material is 8x. So there's a cost tradeoff*. And the 8x weight increase makes handling more difficult. There might be a question of how large can you get a chunk of titanium. Given that titanium's primary use is for light, strong things, it may be difficult to get a large thick (heavy) piece as no one's set up to make it. idk.

Maybe OceanGate's investor materials say something about their plans to build a larger 20 seat tourist ship after proving the concept with their prototype.

After skimming this titanium manufacturer website https://www.toho-titanium.co.jp/en/products/ingot/, and this book chapter, Imma guess getting a bigger, say 2m diameter, thick piece of titanium is difficult, but what do I know? And maybe the end caps can be milled from multiple ingots.

*Looks like titanium goes for $6000/ton ($9000 in 2018), compare $1000 for steel (poorly sourced prices). My WAG says they used 10-20 tons. So maybe material cost isn't that important. One article said they burned a million dollars in fuel per trip. I can't see the one time titanium cost being a huge design factor.

So maybe it's difficult to get large pieces of titanium? Maybe it's tough to lay up that much carbon fiber? Maybe it's hard to find more than 4 passengers? After this goose chase, I'm going to guess it comes down to the size and weight that's easy to move via standard shipping practices. A 20 ton sub can go on a regular truck, probably fits in a regular cargo plane, can be handled by port equipment, etc. Twice the diameter - 8x the weight, and now you need specialized equipment to ship your ship. Might be the max size or weight that fits in a shipping container.

That's a lot of words for idk.

Quote:

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Originally Posted by KQ

It wasn't even a vessel. It was a tube with electronics attached to it. I mean WTF? Five people crammed into something the size of a bathtub. You sit on a metal floor. You can't stand up. You can't crawl. You can't even stretch your legs and the "bathroom" is a hole.

The guy was a billionaire. Couldn't he have built something more civilized? Are all deep submersibles like this?

Looks like Buck Rogers' space ship.

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Stockton wasn’t a billionaire, two of his passengers were.

Attachment 463151

The bud light of submarines.

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Originally Posted by LongShortLong

They are likely all like that. Imagine a tube cut in half lengthwise - pressing the two halves together, the tube wall at the two cuts is what resists the pressure. Doubling the diameter doubles the surface area acted on by the pressure, so the wall needs to be twice as strong/thick. Doubling the diameter quadruples the area of the endcaps, so now there's 4 times the force acting axially on the tube, but the wall "ring" area also doubled, so the wall still needs to be twice as thick. The end caps work similarly. If you track all the doublings, the volume of material is 8x. So there's a cost tradeoff*. And the 8x weight increase makes handling more difficult. There might be a question of how large can you get a chunk of titanium. Given that titanium's primary use is for light, strong things, it may be difficult to get a large thick (heavy) piece as no one's set up to make it. idk.

Maybe OceanGate's investor materials say something about their plans to build a larger 20 seat tourist ship after proving the concept with their prototype.

After skimming this titanium manufacturer website https://www.toho-titanium.co.jp/en/products/ingot/, and this book chapter, Imma guess getting a bigger, say 2m diameter, thick piece of titanium is difficult, but what do I know? And maybe the end caps can be milled from multiple ingots.

*Looks like titanium goes for $6000/ton ($9000 in 2018), compare $1000 for steel (poorly sourced prices). My WAG says they used 10-20 tons. So maybe material cost isn't that important. One article said they burned a million dollars in fuel per trip. I can't see the one time titanium cost being a huge design factor.

So maybe it's difficult to get large pieces of titanium? Maybe it's tough to lay up that much carbon fiber? Maybe it's hard to find more than 4 passengers? After this goose chase, I'm going to guess it comes down to the size and weight that's easy to move via standard shipping practices. A 20 ton sub can go on a regular truck, probably fits in a regular cargo plane, can be handled by port equipment, etc. Twice the diameter - 8x the weight, and now you need specialized equipment to ship your ship. Might be the max size or weight that fits in a shipping container.

That's a lot of words for idk.

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puregravity would approve of this post… where is the dude when we need him most?

Quote:

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Originally Posted by LongShortLong

They are likely all like that. Imagine a tube cut in half lengthwise - pressing the two halves together, the tube wall at the two cuts is what resists the pressure. Doubling the diameter doubles the surface area acted on by the pressure, so the wall needs to be twice as strong/thick. Doubling the diameter quadruples the area of the endcaps, so now there's 4 times the force acting axially on the tube, but the wall "ring" area also doubled, so the wall still needs to be twice as thick. The end caps work similarly. If you track all the doublings, the volume of material is 8x. So there's a cost tradeoff*. And the 8x weight increase makes handling more difficult. There might be a question of how large can you get a chunk of titanium. Given that titanium's primary use is for light, strong things, it may be difficult to get a large thick (heavy) piece as no one's set up to make it. idk.

Maybe OceanGate's investor materials say something about their plans to build a larger 20 seat tourist ship after proving the concept with their prototype.

After skimming this titanium manufacturer website https://www.toho-titanium.co.jp/en/products/ingot/, and this book chapter, Imma guess getting a bigger, say 2m diameter, thick piece of titanium is difficult, but what do I know? And maybe the end caps can be milled from multiple ingots.

*Looks like titanium goes for $6000/ton ($9000 in 2018), compare $1000 for steel (poorly sourced prices). My WAG says they used 10-20 tons. So maybe material cost isn't that important. One article said they burned a million dollars in fuel per trip. I can't see the one time titanium cost being a huge design factor.

So maybe it's difficult to get large pieces of titanium? Maybe it's tough to lay up that much carbon fiber? Maybe it's hard to find more than 4 passengers? After this goose chase, I'm going to guess it comes down to the size and weight that's easy to move via standard shipping practices. A 20 ton sub can go on a regular truck, probably fits in a regular cargo plane, can be handled by port equipment, etc. Twice the diameter - 8x the weight, and now you need specialized equipment to ship your ship. Might be the max size or weight that fits in a shipping container.

That's a lot of words for idk.

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If the choices had been made based on engineering concerns these would be very pertinent questions to ask. But they weren't. They picked titanium and carbon fiber because that's what the boss wanted in his marketing materials. I wonder if he had to be talked out of nanotubes?