this post was submitted on 07 Sep 2023
18 points (100.0% liked)
For sharing fascinating artifacts and replicas
8 readers
1 users here now
Just a magazine for everyone to share artifacts and replicas for the historically-inclined to admire!
founded 1 year ago
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
What was the idea of making it out of metal? Edit: I mean why cover whole body instead of just the head
Ever tried to breath when you head is in atmospheric while your chest isn’t? For example in a pool: swim straight upside in the water, only the head is above. Your chest will be approximately 0.5m below the surface, probably more or less. So you have a pressure difference of just 0.05 bar between the intake (mouth) and the location of the target reservoir (lung). It’s a very noticeable effort you have to overcome with your breathing muscles.
And now imagine being just 20m deep with atmospheric pressure at your head. That would be a pressure difference of 2 bar. You probably won’t be able to inhale anything.
When scuba diving, the air you are inhaling has always the same pressure as your surroundings. When you dive at 40m you are inhaling air with a pressure of 5 bar (that’s also the reason why your tank is emptying much faster at that depth).