Zeagle Ripcord - I'm not convinced

[djanni]

I guess I didn't do a good job of asking my question. Chad's statement was: Furthermore, emergency swimming ascents are instinctive and work very well, thanks to Boyles law.

I don't understand the point he's trying to make... emergency swimming ascents are instinctive??? Thank's to Boyles law???? What's instinctive??? How does Boyles law relate to emergency ascents???

Boyle's Law:

"The volume of a sample of gas is inversely proportional to its pressure, if temperature remains constant".

CESA has nothing to do with compressed gas in the cylinder, but with the gas in your lungs. As you ascend, pressure decreases and thus the volume of gas in your lungs increases. Half the pressure, double the volume. Thus, you will have more volume of gas in your lungs at the surface than you do at depth, which if not released leads to lung overexpansion injuries.

 

[Wristshot]

Furthermore, emergency swimming ascents are instinctive and work very well, thanks to Boyles law.

I am just guessing here, but the instinctive part is how humans naturally tend to bolt for the surface when the defecation hits the rotary oscillator.

As for the part about Boyles Law, I took his statement to mean that CESA's work well (in part) thanks to Boyle's Law. As in once you move up a little, the volumetric expansion of gases tends to make you more bouyant. That would include gases in your lungs, in your exposure protection, and in between.

At least that was my interpretation. Of course I was looking for logic, not looking for a tussle.


Wristshot

 

[DallasNewbie]

Boyle's law also helps in that you can exhale the whole way up and still have air in your lungs.

 

[Splitlip]

I guess I didn't do a good job of asking my question. Chad's statement was: Furthermore, emergency swimming ascents are instinctive and work very well, thanks to Boyles law.

I don't understand the point he's trying to make... emergency swimming ascents are instinctive??? Thank's to Boyles law???? What's instinctive??? How does Boyles law relate to emergency ascents???

I'm thinking Chad was talking about gas in the BCD expanding as one ascends thus creating more lift?