Optimal Pony Bottle Size for Failure at 100ft?

[steinbil]

Because, and again and again -it's easier to hold n-seconds every 0.3 ATA, and then move in n-seconds to the next 0.3 ATA ascent up. If you want an ascent rate of 9mpm or 30fpm for example, then you would hold 10 seconds, and then move up to the next depth in 10 seconds. If you're afraid of "Deep Stops", then do a continuous 1 foot every 2 seconds ascent rate (0.3 meters/2sec) -same as 10 feet every 20 seconds, same as 30 feet every 60 seconds for an overall ascent rate of 30fpm, to whatever safety stop depth you want.

So in the table above then for 9mpm/30fpm, replace the 1 minute time at each depth with 0.3 minutes, and total it -->of course you would expect less volume consumed in this case out of the AL40/5.5L Cylinder (30% of that 41.3 cuft/1156 litres).

I don't think you understood what I wrote. I'm not talking about the actual ascent profile. Just the calculation of gas needed. The table is wildly inefficient for that calculation.

 

[SpaceX Aquanaut]

I don't think you understood what I wrote. I'm not talking about the actual ascent profile. Just the calculation of gas needed. The table is wildly inefficient for that calculation.

Quick and easy to do in the field, and on-the-fly to get an estimate of gas volume needed: don’t need no app or spreadsheet. . . Simply tally the ATA’s.

 

[steinbil]

Quick and easy to do in the field, and on-the-fly to get an estimate of gas volume needed: don’t need no app or spreadsheet. . . Simply tally the ATA’s.

Did you not see that I did the same calculation in a single line? No app or spreadsheet. No table.

Avg ATA * time * RMV = gas needed

 

[OMyMyOHellYes]

No. It was out of gas, attacked by kraken, in a downcurrent, in the dark, with a hole in your drysuit. And kelp.

You forgot the swimming over a volcanic vent through a column of boiling water which causes lack of concentration/situational awareness, the case of Montezuma's Revenge and crapping his drysuit. At least the hole he ripped will let some of it out.

 

[SpaceX Aquanaut]

Did you not see that I did the same calculation in a single line? No app or spreadsheet. No table.

Avg ATA * time * RMV = gas needed

It’s the GUE CAT formula - which is fine in this instance as well.

 

[SpaceX Aquanaut]

You forgot the swimming over a volcanic vent through a column of boiling water which causes lack of concentration/situational awareness, the case of Montezuma's Revenge and crapping his drysuit. At least the hole he ripped will let some of it out.

No, it’s the evil Syrens capturing you and taking you down. . .

 

[grf88]

You forgot the swimming over a volcanic vent through a column of boiling water which causes lack of concentration/situational awareness, the case of Montezuma's Revenge and crapping his drysuit. At least the hole he ripped will let some of it out.

Happened to me twice.

 

[johndiver999]

It’s the GUE CAT formula - which is fine in this instance as well.

You are good! Earlier in the thread, you tried to mock or denigrate a board member (who personally developed a very complex software for buoyancy and suit compression etc) by asking him if he can (not?) do the simplest of math.

Then a different guy explains that the entire calculation can be done in one line (and that yours is undeniably unnecessarily mathematically complex) and in response you reference "a religious text" and try to throw that down as unquestionable and holy. LOL

Truly, Truly I say onto you: "No man will ascend to the father without following my GUE path.

 

[lowwall]

Happened to me twice.

Luxury.

 

[rsingler]

With all the joviality that the last seven pages have engendered, I thought I'd actually go back and read the whole thread!
And to my pleasant surprise, there were lots of proponents of 19, 13 and even 6 CF pony's, early in the thread. Cool!
Just for fun, I plugged in my own SAC, assumed that I wouldn't freak out much, but gave myself 15 seconds to make the switch before I started up. Damned if even a 6 wouldn't get me out of 130 feet!

I'm not kidding. The doubles, or AL40 that you left at home is clearly inferior to the 6, 13 or 19 that you threw in your carry-on and filled with @Couv 's portable transfil adapter in your resort room.