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Posted: 1/13/2023 8:19:41 PM EDT
 Coolest Myth Ever! Deep Sea Diver CRUSHED |
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Posted: 1/13/2023 8:22:51 PM EDT
[#1]
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Posted: 1/13/2023 8:25:16 PM EDT
[#2]
RIP Jessie
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Posted: 1/13/2023 8:26:50 PM EDT
[#3]
Quote HistoryQuoted: RIP Jessie And grant |
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Posted: 1/13/2023 10:34:09 PM EDT
[#4]
Check valves are important.
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Posted: 1/13/2023 10:47:36 PM EDT
[#5]
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Posted: 1/13/2023 10:48:12 PM EDT
[#6]
That is fascinating and cool.......
..... but they're laughing too hard. 
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Posted: 1/13/2023 10:55:57 PM EDT
[#7]
Well that is nothing short of completely fucking terrifying.
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Posted: 1/13/2023 10:57:49 PM EDT
[#8]
RIP the queen of speed
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Posted: 1/13/2023 11:00:57 PM EDT
[#9]
Grant was a cool dude, he's one of the few celebrity deaths that genuinely made me sad.
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Posted: 1/13/2023 11:03:43 PM EDT
[#10]
Quote HistoryQuoted: Grant was a cool dude, he's one of the few celebrity deaths that genuinely made me sad. What happened to him ? I never heard that story. . |
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Posted: 1/13/2023 11:06:43 PM EDT
[#11]
Quote HistoryQuoted: What happened to him ? I never heard that story. . Quote HistoryQuoted: Quoted: Grant was a cool dude, he's one of the few celebrity deaths that genuinely made me sad. What happened to him ? I never heard that story. . Brain aneurysm. Couple years back. RIP. |
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Posted: 1/13/2023 11:07:13 PM EDT
[#12]
I really liked that show
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Posted: 1/13/2023 11:07:23 PM EDT
[#13]
Quote HistoryQuoted: Grant was a cool dude, he's one of the few celebrity deaths that genuinely made me sad. Same here. Seemed like a great guy. Loved me some MythBusters back in the day. |
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Posted: 1/13/2023 11:07:54 PM EDT
[#14]
Physics wins
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Posted: 1/13/2023 11:10:41 PM EDT
[#15]
I don't quite understand. Was that a pressure suit? It was soft, so it couldn't hold back pressure. All it could do is keep the pressure inside from being lower than the pressure outside. I would imagine that the valve system was simply to keep the suit "inflated." Releasing the pressure would simply allow the suit to collapse on the meat man, which was already under the same pressure, since the suit was soft and couldn't hold back any pressure! So what was putting the squeeze on meat man? It was already experiencing the squeeze, since the suit was soft and wasn't capable of holding pressure back.
To reiterate: A soft suit CANNOT hold back pressure. If you're wearing a soft suit, you are always experiencing the full pressure of whatever depth you are at. Which means you need time to adapt to your pressure, at certain depths you will need an air mixture that is mostly a neutral gas like helium or else you will experience nitrogen or oxygen poisoning, and you will need time to depressurize to safely release gasses dissolved in your flesh. But if you're already at pressure, what pressure was being released on the ship? And what extra squeeze happened that crushed the meat-man's organs? He was already under pressure! IF HIS SUIT WAS INFLATED BY THE PUMP ON THE BOAT, RELEASING THE VALVE WOULD LOWER THE PRESSURE IN HIS SUIT! NOT MAKE IT HIGHER! I feel like I'm taking crazy pills! Am I missing something huge? |
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Posted: 1/13/2023 11:24:33 PM EDT
[#16]
It was inflated by air pressure.
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Posted: 1/13/2023 11:25:26 PM EDT
[#17]
Once the air is dumped then the water pressure pushes into the rigid helmet.
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Posted: 1/13/2023 11:26:44 PM EDT
[#18]
Quote HistoryQuoted: I don't quite understand. Was that a pressure suit? It was soft, so it couldn't hold back pressure. All it could do is keep the pressure inside from being lower than the pressure outside. I would imagine that the valve system was simply to keep the suit "inflated." Releasing the pressure would simply allow the suit to collapse on the meat man, which was already under the same pressure, since the suit was soft and couldn't hold back any pressure! So what was putting the squeeze on meat man? It was already experiencing the squeeze, since the suit was soft and wasn't capable of holding pressure back. To reiterate: A soft suit CANNOT hold back pressure. If you're wearing a soft suit, you are always experiencing the full pressure of whatever depth you are at. Which means you need time to adapt to your pressure, at certain depths you will need an air mixture that is mostly a neutral gas like helium or else you will experience nitrogen or oxygen poisoning, and you will need time to depressurize to safely release gasses dissolved in your flesh. But if you're already at pressure, what pressure was being released on the ship? And what extra squeeze happened that crushed the meat-man's organs? He was already under pressure! IF HIS SUIT WAS INFLATED BY THE PUMP ON THE BOAT, RELEASING THE VALVE WOULD LOWER THE PRESSURE IN HIS SUIT! NOT MAKE IT HIGHER! I feel like I'm taking crazy pills! Am I missing something huge? The air tube was putting pressure in the suit equal to the water pressure at depth. That keeps the suit at equilibrium. Your lungs have 14.7 PSI in them (roughly) currently, but the air outside is also the same pressure. No net difference. But, remove the pressure from the suit, and all that water pressure crushes the meat popsicle inside. |
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Posted: 1/13/2023 11:28:11 PM EDT
[#19]
My team at work responds to Delta-P diving accidents. I've seen fully suited divers (with their air tanks) sucked through an 8" pipe. Once you've seen that in-person, you really respect pressure
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Posted: 1/13/2023 11:31:32 PM EDT
[#20]
Quote HistoryQuoted: Once the air is dumped then the water pressure pushes into the rigid helmet. No. Just no. It just doesn't work that way! What is the air from the pump doing? The only thing it could be doing is inflating the body suit. The only way to do that is to have the pressure in the suit HIGHER than the ambient pressure of that depth in the ocean. Which means that releasing the pressure would DECREASE the pressure that is being exerted on the body. The rigid helmet means NOTHING if it is not connected to a rigid full-body suit. It's like going for a spacewalk with a helmet, but just shorts and tee-shirt below it. The helmet does nothing! |
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Posted: 1/13/2023 11:32:55 PM EDT
[#21]
Quote HistoryQuoted: No. Just no. It just doesn't work that way! What is the air from the pump doing? The only thing it could be doing is inflating the body suit. The only way to do that is to have the pressure in the suit HIGHER than the ambient pressure of that depth in the ocean. Which means that releasing the pressure would DECREASE the pressure that is being exerted on the body. The rigid helmet means NOTHING if it is not connected to a rigid full-body suit. It's like going for a spacewalk with a helmet, but just shorts and tee-shirt below it. The helmet does nothing! You need to go back to your physics homework... |
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Posted: 1/13/2023 11:33:00 PM EDT
[#22]
Quote HistoryQuoted: My team at work responds to Delta-P diving accidents. I've seen fully suited divers (with their air tanks) sucked through an 8" pipe. Once you've seen that in-person, you really respect pressure How often do fatal accidents happen yearly? |
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Posted: 1/13/2023 11:33:00 PM EDT
[#23]
Quote HistoryQuoted: My team at work responds to Delta-P diving accidents. I've seen fully suited divers (with their air tanks) sucked through an 8" pipe. Once you've seen that in-person, you really respect pressure As a public safety diver, delta P scares the shit out of me. |
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Posted: 1/13/2023 11:34:40 PM EDT
[#24]
Quote HistoryQuoted: The air tube was putting pressure in the suit equal to the water pressure at depth. That keeps the suit at equilibrium. Your lungs have 14.7 PSI in them (roughly) currently, but the air outside is also the same pressure. No net difference. But, remove the pressure from the suit, and all that water pressure crushes the meat popsicle inside. No. the suit that meat man was wearing was clearly a soft suit. It cannot hold back pressure. It can only contain pressure. Which means that any pressure inside the suit must be equal or greater than the pressure outside the suit. Releasing the pressure in the suit could only LOWER the pressure. You cannot make it greater by releasing pressure! |
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Posted: 1/13/2023 11:35:25 PM EDT
[#25]
Quote HistoryQuoted: You need to go back to your physics homework... Explain to me how a soft suit can hold back pressure. Explain, if you understand this better than me. In the video, it is clear that the suit is inflated. When it supposedly shows the meat man at full 300f depth, the suit is clearly inflated. That is only possible if the suit pressure is at about 150PSI+! Otherwise the suit would be collapsed against meat mean's skin! |
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Posted: 1/13/2023 11:36:50 PM EDT
[#26]
Quote HistoryQuoted: How often do fatal accidents happen yearly? Almost all Delta-P accidents result in fatalities. Once the pressure has got you, it will not let go. Your body is the plug that is stopping it from equalizing. We just covered this during our last OSHA compliance, but I believe it's a few dozen fatilities within the US annually. Globally, probably a lot more. A lot of 3rd world countries do not have the underwater safety standards that we have. Especially at their power plants. |
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Posted: 1/13/2023 11:37:17 PM EDT
[#27]
Quote HistoryQuoted: I don't quite understand. Was that a pressure suit? It was soft, so it couldn't hold back pressure. All it could do is keep the pressure inside from being lower than the pressure outside. I would imagine that the valve system was simply to keep the suit "inflated." Releasing the pressure would simply allow the suit to collapse on the meat man, which was already under the same pressure, since the suit was soft and couldn't hold back any pressure! So what was putting the squeeze on meat man? It was already experiencing the squeeze, since the suit was soft and wasn't capable of holding pressure back. To reiterate: A soft suit CANNOT hold back pressure. If you're wearing a soft suit, you are always experiencing the full pressure of whatever depth you are at. Which means you need time to adapt to your pressure, at certain depths you will need an air mixture that is mostly a neutral gas like helium or else you will experience nitrogen or oxygen poisoning, and you will need time to depressurize to safely release gasses dissolved in your flesh. But if you're already at pressure, what pressure was being released on the ship? And what extra squeeze happened that crushed the meat-man's organs? He was already under pressure! IF HIS SUIT WAS INFLATED BY THE PUMP ON THE BOAT, RELEASING THE VALVE WOULD LOWER THE PRESSURE IN HIS SUIT! NOT MAKE IT HIGHER! I feel like I'm taking crazy pills! Am I missing something huge? I think the pressure in the the suit is maintained at or slightly above atmospheric. As he descends the water pressure squeezes the suit to the tune of about 1 PSI every 27.7 inches he goes below the surface. When the pressure is released in the suit at 300' he instantly experiences about 130 PSI on his body, squishing him. My math could be off, I'm not a scientist. 
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Posted: 1/13/2023 11:37:22 PM EDT
[#28]
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Posted: 1/13/2023 11:38:27 PM EDT
[#29]
Quote HistoryQuoted: Explain to me how a soft suit can hold back pressure. Explain, if you understand this better than me. Quote HistoryQuoted: Quoted: You need to go back to your physics homework... Explain to me how a soft suit can hold back pressure. Explain, if you understand this better than me. Nobody is claiming a soft suit can hold back pressure. That’s kinda the point of the video. |
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Posted: 1/13/2023 11:40:34 PM EDT
[#30]
Quote HistoryQuoted: I think the pressure in the the suit is maintained at or slightly above atmospheric. As he descends the water pressure squeezes the suit to the tune of about 1 PSI every 27.7 inches he goes below the surface. When the pressure is released in the suit at 300' he instantly experiences about 130 PSI on his body, squishing him. My math could be off, I'm not a scientist. That is what they describe in the video. However, this is simply impossible with a soft suit, which the video clearly shows the suit as being. A soft suit can only contain a pressure equal or greater than the ambient pressure. So at 300 feet, the suit cannot experience any lower than the ambient pressure at that depth, which is about 150PSI. In order for the suit to be inflated, the suit must contain slightly higher than 150psi, or it would collapse. |
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Posted: 1/13/2023 11:42:04 PM EDT
[#31]
Quote HistoryQuoted: Nobody is claiming a soft suit can hold back pressure. That’s kinda the point of the video. OK. So what are they releasing in order to "crush" meat man's organs? As you correctly pointed out, the meat man is already experiencing full pressure of the depth of 300 feet under the water, PLUS the pressure in the suit to inflate it (only a few PSI would do the job, so we can pretty much discount it as a factor), so what extra pressure is meat man experiencing after whatever pressure is released? As you correctly pointed out, releasing pressure in the suit could only DECREASE the pressure exerted on meat man's body! |
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Posted: 1/13/2023 11:46:25 PM EDT
[#32]
Quote HistoryQuoted: I don't quite understand. I feel like I'm taking crazy pills! Am I missing something huge? |
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Posted: 1/13/2023 11:47:47 PM EDT
[#33]
Quote HistoryQuoted: Brain aneurysm. Couple years back. RIP. Whaaaaat? Fuck! 
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Posted: 1/13/2023 11:47:53 PM EDT
[#34]
Quote HistoryQuoted: Username checks out. Explain to me what huge thing I'm missing. How does a soft suit hold back pressure? Otherwise, don't post as if you know what you're talking about. |
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Posted: 1/13/2023 11:48:53 PM EDT
[#35]
Quote HistoryQuoted: Explain to me what huge thing I'm missing. How does a soft suit contain pressure? Otherwise, don't post as if you know what you're talking about. |
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Posted: 1/13/2023 11:52:00 PM EDT
[#36]
Quote HistoryQuoted: OK. So what are they releasing in order to "crush" meat man's organs? As you correctly pointed out, the meat man is already experiencing full pressure of the depth of 300 feet under the water, PLUS the pressure in the suit to inflate it (only a few PSI would do the job, so we can pretty much discount it as a factor), so what extra pressure is meat man experiencing after whatever pressure is released? As you correctly pointed out, releasing pressure in the suit could only DECREASE the pressure exerted on meat man's body! Without a check valve on the helmet, the umbilical serves as conduit to the surface pressure. Water is denser than air, so the pressure pushes the contents of the suit into the hat and up the umbilical until equilibrium is reached. |
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Posted: 1/13/2023 11:52:30 PM EDT
[#37]
Quote HistoryQuoted: The same way an inflated balloon does in your living room. A balloon contains HIGHER pressure than the ambient pressure. At 300 feet below sea level, the ambient pressure is about 150psi. Meat man's suit is the same as a balloon. Therefore, to be inflated, it must contain a pressure HIGHER than 150PSI. A release in pressure in the suit will LOWER the pressure exerted on meat man, not raise it. This is not a difficult concept to understand, you even stated it in your post. |
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Posted: 1/13/2023 11:53:41 PM EDT
[#38]
Quote HistoryQuoted: Explain to me what huge thing I'm missing. How does a soft suit hold back pressure? Otherwise, don't post as if you know what you're talking about. fill it full of pudding. close it. twist it so it has pressure. poke a hole in the side. what happens? |
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Posted: 1/13/2023 11:54:52 PM EDT
[#39]
Quote HistoryQuoted: Without a check valve on the helmet, the umbilical serves as conduit to the surface pressure. Water is denser than air, so the pressure pushes the contents of the suit into the hat and up the umbilical until equilibrium is reached. Quote HistoryQuoted: Quoted: OK. So what are they releasing in order to "crush" meat man's organs? As you correctly pointed out, the meat man is already experiencing full pressure of the depth of 300 feet under the water, PLUS the pressure in the suit to inflate it (only a few PSI would do the job, so we can pretty much discount it as a factor), so what extra pressure is meat man experiencing after whatever pressure is released? As you correctly pointed out, releasing pressure in the suit could only DECREASE the pressure exerted on meat man's body! Without a check valve on the helmet, the umbilical serves as conduit to the surface pressure. Water is denser than air, so the pressure pushes the contents of the suit into the hat and up the umbilical until equilibrium is reached. That's kinda what I was thinking. Because that depth/pressure alone does not crush/kill someone. Saturation divers live/work at that pressure or greater for weeks at a time. |
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Posted: 1/13/2023 11:56:14 PM EDT
[#40]
Quote HistoryQuoted: A balloon contains HIGHER pressure than the ambient pressure. At 300 feet below sea level, the ambient pressure is about 150psi. Meat man's suit is the same as a balloon. Therefore, to be inflated, it must contain a pressure HIGHER than 150PSI. A release in pressure in the suit will LOWER the pressure exerted on meat man, not raise it. This is not a difficult concept to understand, you even stated it in your post. Think of the suit as a ketchup packet with just a tiny corner torn off. Squeeze it really hard. What happens? |
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Posted: 1/13/2023 11:56:50 PM EDT
[#41]
Quote HistoryQuoted: Almost all Delta-P accidents result in fatalities. Once the pressure has got you, it will not let go. Your body is the plug that is stopping it from equalizing. We just covered this during our last OSHA compliance, but I believe it's a few dozen fatilities within the US annually. Globally, probably a lot more. A lot of 3rd world countries do not have the underwater safety standards that we have. Especially at their power plants. Quote HistoryQuoted: Quoted: How often do fatal accidents happen yearly? Almost all Delta-P accidents result in fatalities. Once the pressure has got you, it will not let go. Your body is the plug that is stopping it from equalizing. We just covered this during our last OSHA compliance, but I believe it's a few dozen fatilities within the US annually. Globally, probably a lot more. A lot of 3rd world countries do not have the underwater safety standards that we have. Especially at their power plants. 24+ a year in a specialty field….yikes! |
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Posted: 1/13/2023 11:59:31 PM EDT
[#42]
Quote HistoryQuoted: A balloon contains HIGHER pressure than the ambient pressure. At 300 feet below sea level, the ambient pressure is about 150psi. Meat man's suit is the same as a balloon. Therefore, to be inflated, it must contain a pressure HIGHER than 150PSI. A release in pressure in the suit will LOWER the pressure exerted on meat man, not raise it. This is not a difficult concept to understand, you even stated it in your post. The pressure inside the suit PUSHES BACK on the water pressure. A balloon in your living room IS higher pressure than ambient... and the rubber of the balloon is pushing back on the pressure inside. It all finds equilibrium. Just like your tires on your car. The PSI in the tire is meant to balance the pressure of the weight of the car on the tires. air pressure---------->|suit|<---------water pressure It's like a seesaw balancing on the membrane of the suit. Remove pressure from one side, the other side starts winning. |
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Posted: 1/14/2023 12:03:02 AM EDT
[#43]
so here is what ACTUALLY happens.
the diver is at depth, lets say 300 feet. there is 300 feet of water between him and the surface. there is 300 feet of air between him and the surface INSIDE THE AIR HOSE connected to his helmet. the air inside the hose is pressurized to match the pressure of the water at the divers depth, plus a few more psi so it will flow downward to the diver. if there is a failure in the air system that causes the pressure to decrease in the air hose, now the water will try to flow into the hose. because the only opening there is for the water to enter the hose at is inside the suit, inside the helmet, the water will rush in that way, if the suit is sealed to the diver which it would be, then the divers flesh will be pushed on by the water column trying to get into that hose and rush back up it to displace the now lower pressure air. 300 feet of water generates a ballpark of 150psi. thats 150 psi trying to cram your flesh through the neck opening of the helmet. |
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Posted: 1/14/2023 12:05:21 AM EDT
[#44]
OK, I think I'm understanding it now. There is no safety valve, no mechanism whatsoever, and when the pumps are turned off, the body is fully subjected to the water pressure at depth, connected to sea level pressure through the hose that no longer has a pump maintaining pressure. If it weren't for that hose, everything would be fine for the diver (except he'd run out of air), but since it's connected to the surface with no safetly valves, the person at depth is suddenly exposed to sea level pressure?
OK, I admit I was wrong. Not in science, but in understanding the mechanics of the suit and hose assembly. I learned something today, both about deep sea diving apparatus and in hubris, I guess? I made assumptions based on my knowledge, that, while they were "correct," blinded me to reaching a more basic understanding of what was actually going on. A lesson in hubris is healthy. Not fun, but critical to growth. I apologize to anyone I talked down to, and for acting so smart and condescending when I was missing a critical piece of information that made me wrong. |
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Posted: 1/14/2023 12:06:50 AM EDT
[#45]
Is this the new airplane on a treadmill?
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Posted: 1/14/2023 12:09:09 AM EDT
[#46]
Quote HistoryQuoted: Is this the new airplane on a treadmill? GD needs to watch a few dozen hours of Roadrunner and Coyote to learn about physics. |
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Posted: 1/14/2023 12:10:28 AM EDT
[#47]
Quote HistoryQuoted: so here is what ACTUALLY happens. the diver is at depth, lets say 300 feet. there is 300 feet of water between him and the surface. there is 300 feet of air between him and the surface INSIDE THE AIR HOSE connected to his helmet. the air inside the hose is pressurized to match the pressure of the water at the divers depth, plus a few more psi so it will flow downward to the diver. if there is a failure in the air system that causes the pressure to decrease in the air hose, now the water will try to flow into the hose. because the only opening there is for the water to enter the hose at is inside the suit, inside the helmet, the water will rush in that way, if the suit is sealed to the diver which it would be, then the divers flesh will be pushed on by the water column trying to get into that hose and rush back up it to displace the now lower pressure air. 300 feet of water generates a ballpark of 150psi. thats 150 psi trying to cram your flesh through the neck opening of the helmet. |
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Posted: 1/14/2023 12:19:06 AM EDT
[#48]
Quote HistoryQuoted: Surprised nobody has mentioned google images and the Byford Dolphin. Since there is already a SME here. Is explosive decompression considered a Delta-P accident? @Im_Awake |
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Posted: 1/14/2023 12:19:56 AM EDT
[#49]
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Posted: 1/14/2023 12:21:18 AM EDT
[#50]
Quote HistoryQuoted: Surprised nobody has mentioned google images and the Byford Dolphin. Byford Dolphin Accident: How Living Under Intense Pressure Led To One Of The Most Gruesome Accidents In History Coward, Lucas, and Bergersen were exposed to the effects of explosive decompression and died in the positions indicated by the diagram. Investigation by forensic pathologists determined that Hellevik, being exposed to the highest pressure gradient and in the process of moving to secure the inner door, was forced through the crescent-shaped opening measuring 60 centimetres (24 in) long created by the jammed interior trunk door. With the escaping air and pressure, it included bisection of his thoracoabdominal cavity, which resulted in fragmentation of his body, followed by expulsion of all of the internal organs of his chest and abdomen, except the trachea and a section of small intestine, and of the thoracic spine. These were projected some distance, one section being found 10 metres (30 ft) vertically above the exterior pressure door.[3]:?95? |
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