Thinking Outside the Tank

[captain]

How about a 10,00 psi carbon fiber spare air.

 

[String]

The buoyancy issues would be awful, pure CF is far more buoyant than steel and even aluminium.

The horrible Aluminium tanks are bad enough requiring a diver to wear extra lead just to sink the tank, CF would be far worse. Only use i could see is assuming they solve the delamination problems and the incredible price of tank testing would be in a twinset or similar where very little or no exposure protection is worn. Anything else it makes no sense to have very buoyant tanks requiring yet more lead just to sink them.

 

[Blackwood]

Instead of diving twin 130's @ 3000psi why not dive twin 260's @ 1500psi. Everything would be safer, cheaper and less wear and of course diving large steel doubles is just fine

Because a cylinder that holds 260CF @ 1500PSI would be bigger than a t-bottle.

Obviously high-capacity (i.e. high pressure) cylinders have merit, but going to the far end of the spectrum and pointing to ridiculously unwieldy and impossible to use setup doesn't really help prove your point.

 

[Dave1981]

Is that an exponential extrapolation?

More gas in a smaller package would be nice. The costs will probably prohibit it from ever happening.

Kind of. Free hand on scaled paper using plots at 500psi intervals up to 4000psi then extrapolating to 6000. Using 0-1000psi straight line as a boyle's law reference line.

Not completely scientific but close enough for a look at the shape. Interestingly enough it's above 3000psi seems to be where the extra pressure really starts to make a difference, which is where most of us fill to anyway.

Possibly, just maybe someone's thought about this subject before... :idea:

 

[H2O 70]

How about a 10,00 psi carbon fiber spare air.

I'll settle for the current 3000psi AL ones.