YT video of a scale model of carbon fiber implosion.

Wouldn’t mind going out like that.

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Wouldn’t mind going out like that.

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That's basically the point and also to provide a good visual of how the unfortunate passengers on the Titan perished. It took microseconds.

It annoys me that he still grinds his own turning bits. I hate that shite. Hate it.

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Except the difference is that they were at 3,000 feet below sea level and the pressure was well over 10,000 psi.

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3000 feet under seawater is approximately 1350 psig.

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You can see the implosion occurred at 80 bar (1160 psig). That just over 800 meters (2625 feet) water depth.

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Except the difference is that they were at 3,000 feet below sea level and the pressure was well over 10,000 psi.

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Eh, those numbers are wrong. The number bandied about for Titan at implosion was 3000 meters down, which is about 9,800 feet. To come at it from another perspective, if (as reported) they were 1.75 hours into a 2.50 hour descent at a constant speed, going down to 12,500 feet, then they would have been at about 8,750 feet.

As for the pressure at that depth, the National Oceanic and Atmospheric Administration says, "The pressure increases about one atmosphere for every 10 meters of water depth." One atmosphere (1 atm) is about 14.7 psi. So at 3000 m deep, the pressure is about 300 atm = 4400 psi.

[ETA]
You can easily enough check the calcs yourself, remembering that 1" = 2.54 cm, 1 cc = 1 cm^2, and that much water weighs 1 g. So a 1 m tall column of water of 1 sq. in. has a volume of 2.54 x 2.54 x 100 cm = 645 cm^2, therefore a weight of 645 g = 0.645 kg. Since 1 kg weighs 2.2046 lb, that's 1.42 psi per meter down. At 3000 m, we get 1.42 x 3,000 = 4267 psi.

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Not that I really care but why? The guy is probably just trying to save a buck and the stuff he is turning is probably just hobby parts.

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It is entirely personal for me. I hate grinding them. Learning to do it was a pain in the arse and fingers. I can do it, sure, but there's rarely ever a real need or point in doing so. And as far as saving money goes, you're talking pennies when you consider the time to grind it, as well as resharpen, compared to the cost of buying multi-sided inserts in bulk.

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It is entirely personal for me. I hate grinding them. Learning to do it was a pain in the arse and fingers. I can do it, sure, but there's rarely ever a real need or point in doing so. And as far as saving money goes, you're talking pennies when you consider the time to grind it, as well as resharpen, compared to the cost of buying multi-sided inserts in bulk.

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I have very little experience with turning and milling albeit I've designed parts requiring turning, milling and shaping. My only experience was in school and we mostly focused on the programing side. The guy sounds like he is from Eastern Europe so he might live in a location were supplies are not reliable.

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9800 is 4410 psig. Just divide depth in feet by 2.3106 and that is your pressure in fresh water. Then multiply by 1.04 for saltwater.

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Right, there are some ways we can 'sharpen our pencils' a bit. I was (am) unsure whether the salinity / density of seawater is constant to those depths. And the density of water varies slightly with temperature (and temperature at depth is substantially lower than surface water temperature). And you say psig instead of psi--presumably we need to add the surface atmospheric pressure i.e. 14.7 psi or so.

But that's probably all in the realm of false precision because AFAIK we don't really know precisely how deep Titan was at the final catastrophic failure. Changing the assumed depth within the stated / assumed ranges affects the pressure substantially more than this stuff.

Read somewhere that the shockwave was faster than nerve conduction velocity. Literally impossible to feel pain or even realize what was happening.

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Read somewhere that the shockwave was faster than nerve conduction velocity.

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The frequency is estimated to be 25 cycles per second. Or one cycle 40 microseconds. A lot quicker than you would notice.