|
Post by wvengineer on Aug 6, 2014 0:23:06 GMT
This one probably is not testable on the show for obvious reasons, but I was wondering how realistic it is.
From the James Bond Movie License to Kill:
The evil villain does a lot of diving and so naturally has a decompression chamber on his large luxury yacht/floating evil headquarters. One day he is mad at a random underling, so he put them in the decompression chamber. After sealing them him in, he starts to increase the chamber pressure. Then he throws a valve and the chamber suddenly dumps the pressure and the underlings suffers a painful, messy death.
Here is the scene in question:
How realistic is that? Considering they only increase the pressure for a minute or two before the execution, how much air pressure can a human body absorb in that short of time? For that short, I would think the worst possible damage would be to rupture their eardrums, not cause the whole body to go pop.
|
|
|
Post by the light works on Aug 6, 2014 2:30:59 GMT
I highly doubt the explosive decompression could happen. however, the worst damage could be a ruptured lung or an air embolism in the blood - either of which could be fatal - but it is critically dependent on how many atmospheres of pressure the person is under and for how long. a person can be at 4 atmospheres for up to 2 minutes without needing to decompress on ascension (using 80s series NAUI dive tables.) of course, this assumes a moderate ascension rate (I.E. no faster than your exhalation bubbles)
|
|
|
Post by Lex Of Sydney Australia on Aug 6, 2014 4:25:44 GMT
They cold always build a ballistic Buster & give him fake veins that pump blood & fill him with organs & blood care of a recently dead pig. Or alternatively & perhaps easer to do would be to just use a whole dead pig (blood, guts & all) & use that for the myth. It's not so much the technical challenge I see being the problem, but the gore factor that would stop them from doing this myth.
|
|
|
Post by the light works on Aug 6, 2014 5:34:15 GMT
They cold always build a ballistic Buster & give him fake veins that pump blood & fill him with organs & blood care of a recently dead pig. Or alternatively & perhaps easer to do would be to just use a whole dead pig (blood, guts & all) & use that for the myth. It's not so much the technical challenge I see being the problem, but the gore factor that would stop them from doing this myth. they stuffed a buster into a dive helmet...
|
|
|
Post by silverdragon on Aug 6, 2014 7:33:54 GMT
(One of) The usual problems with Divers is nitrogen Narcosis. Decompression.... from a diving decompression chamber.... I may be wrong, but I dont think a decompression chamber has enough "Difference" to make a messy out of decompression?... Medical problems from "Bends", yes, I can see that, but not an explosive result to decompression.... The chamber is not built to compress that much?....
|
|
|
Post by the light works on Aug 6, 2014 14:03:56 GMT
(One of) The usual problems with Divers is nitrogen Narcosis. Decompression.... from a diving decompression chamber.... I may be wrong, but I dont think a decompression chamber has enough "Difference" to make a messy out of decompression?... Medical problems from "Bends", yes, I can see that, but not an explosive result to decompression.... The chamber is not built to compress that much?.... and other than the lungs - IF you are on breathing apparatus - and the sinuses (including the inner ears); the body responds to pressure by compressing, not by increasing internal pressure.
|
|
|
Post by tom1b on Aug 7, 2014 8:44:22 GMT
The gauges & dials don't really match. The dial he turns maxes out at 800psi or 54 atmospheres. The depth gauge has a indicated setting of 400ft, where the pressure is 12 atmospheres or 176 psi. This does match the next gauge shown set at 175 psi. The Byford Dolphin opened a valve at the wrong time and went from 9 atmospheres of pressure to 1 in a split second. Wiki-Byford DolphinCoward, Lucas and Bergersen were exposed to the effects of explosive decompression and died in the positions indicated by the diagram. Subsequent investigation by forensic pathologists determined Hellevik, being exposed to the highest pressure gradient, violently exploded due to the rapid and massive expansion of internal gases. All of his thoracic and abdominal organs, and even his thoracic spine, were ejected, as were all of his limbs. Simultaneously, his remains were expelled through the narrow trunk opening left by the jammed chamber door, less than 60 centimetres (24 in) in diameter. Fragments of his body were found scattered about the rig. One part was even found lying on the rig's derrick, 10 metres (30 ft) directly above the chambers. The deaths of all four divers were most likely instantaneous.
|
|
|
Post by silverdragon on Aug 7, 2014 8:59:22 GMT
Erm, thanks for that very graphic description..... I suppose if you are close to where the air is being ejected from a high pressure chamber, bits of you flying through the opening (shudders...) could be seen as "Explosive".......
I think Tom has it there comprehensively. Expansion of internal gasses disolved in Blood, Organs, etc....
|
|
|
Post by Lex Of Sydney Australia on Aug 12, 2014 6:58:45 GMT
The gauges & dials don't really match. The dial he turns maxes out at 800psi or 54 atmospheres. The depth gauge has a indicated setting of 400ft, where the pressure is 12 atmospheres or 176 psi. This does match the next gauge shown set at 175 psi. The Byford Dolphin opened a valve at the wrong time and went from 9 atmospheres of pressure to 1 in a split second. Wiki-Byford DolphinCoward, Lucas and Bergersen were exposed to the effects of explosive decompression and died in the positions indicated by the diagram. Subsequent investigation by forensic pathologists determined Hellevik, being exposed to the highest pressure gradient, violently exploded due to the rapid and massive expansion of internal gases. All of his thoracic and abdominal organs, and even his thoracic spine, were ejected, as were all of his limbs. Simultaneously, his remains were expelled through the narrow trunk opening left by the jammed chamber door, less than 60 centimetres (24 in) in diameter. Fragments of his body were found scattered about the rig. One part was even found lying on the rig's derrick, 10 metres (30 ft) directly above the chambers. The deaths of all four divers were most likely instantaneous. Thanks for that I think I'm going to have vegetarian tonight. (No tomato's or beetroot mind you)
|
|
|
Post by c64 on Oct 23, 2014 11:41:47 GMT
This method is described in detail in the Tom Clancy novel "Without Remorse". The explanation in his novel looks valid to me. I know the basics of deep diving.
There are two major effects. One is like being exposed to an explosion, the pressure differences damage tissue especially inside the lungs.
The other effect is "the bends" when nitrogen becomes solved in the blood and create bubbles on decompression. Like air trapped in a central heating system, the gas bubbles prevent the flow, especially inside the lungs and brain.
|
|
|
Post by ironhold on Nov 26, 2014 4:37:40 GMT
Finally got around to watching this one over the weekend.
I agree that there's no way to use the original footage due to the gore factor, but we've had it happen before where animation was created to cover for it.
Also - I can't recall if the bit about the security guard and the eel tank was shown on the show before. Was it?
|
|