4 ms·

The “breath through a 20m pipe” part isn’t going to work: all that dead space will (literally) kill you.

• mic47 7y ago
  Depends on whether you breath in and breath into the pipe (which is not ok), or just breath in from the pipe, and breath out elsewhere (you will need some valve that will regulate the flow here).
  • prostheticvamp 7y ago
    No, I think the issue is that your lungs can’t generate enough negative pressure to respirate effectively through 20m of pipe.
    • Dylan16807 7y ago
      They're not underwater. It doesn't take much pressure just to move air through a tube.
• sp332 7y ago
  I assumed they were going to put a fan on it because otherwise it would be hard to even get a breath in, even if there was a check valve for exhaling.