Inspiration 29cf cylinders?

RebreatherDave · 27th December 2005, 01:31

Cavesekeer7 on another board wrote this:

Quote:

"In Europe 3 ltr high pressure tanks are available that fit the Inspiration, they have 29 cft rather than the 20 cft sold in the US."

That particular board is owned by a bunch of male hating radical left wing fascists (ok, so I held back a bit) so I can't ask there..

I have original AP cylinders rated at 232 bars which I understood was about 19-20 cubic feet....

Who makes 29 cf cylinders for the Inspiration and at what bar is this volume?

Simon A · 27th December 2005, 01:54

That would be 300bar 3 litre cylinders.
If I remember corectly one cubic foot is 27 free litres? 300 * 3 /27 = 33 and a bit cubic foot, but by the time you've accounted for the deviation from Ideal gas laws at that pressure, it's a little bit less than 33 Cubic foot

HTH
Simon A

***jradomski*** · 27th December 2005, 02:28

Quote: (Originally Posted by RebreatherDave)

Cavesekeer7 on another board wrote this:

That particular board is owned by a bunch of male hating radical left wing fascists (ok, so I held back a bit) so I can't ask there..

I have original AP cylinders rated at 232 bars which I understood was about 19-20 cubic feet....

Who makes 29 cf cylinders for the Inspiration and at what bar is this volume?

232 bar 3 liter cylinders are 24.7 cuft (ideal) (25.9 for oxygen)(23.6 for air)
300 bar 3 liters cylinders are 31.8 cuft (ideal) for Air this about 29CF I would not fill oxygen this high!

The actual conversion is 1 cuft is 28.3168467 liter at standard temp

RebreatherDave · 27th December 2005, 07:12

Ok, so who makes those?

***jradomski*** · 27th December 2005, 08:49

Quote: (Originally Posted by RebreatherDave)

Ok, so who makes those?

faber

depending on the country it is for they weight between 4.2 and 5kg

**nigelh** · 27th December 2005, 10:12

Quote: (Originally Posted by RebreatherDave)

Ok, so who makes those?

I have a Faber 3L/300bar cylinder that I use as a clip on air pony when I am Rebreather no-stop diving with somebody on an OC single. It gives me something to hand off if they have a problem. It is almost exactly the same size as the YBOD cylinders but, naturally, I'd have to change the valve to fit it.

I confess I wouldn't bother because the little bit of extra duration is insignificant. I fitted a reg on the O2 and I think that buys me far more in a no-stop bailout situation. If it's not no-stop I have a 7L of something along.

Oxygen - I have routinely pumped this to 300bar. Slowly and carefully I admit and I clean my own kit but, naturally, that doesn't say it would always work for everybody.

27th December 2005, 01:31	#1 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Inspiration 29cf cylinders? Cavesekeer7 on another board wrote this: Quote: "In Europe 3 ltr high pressure tanks are available that fit the Inspiration, they have 29 cft rather than the 20 cft sold in the US." That particular board is owned by a bunch of male hating radical left wing fascists (ok, so I held back a bit) so I can't ask there.. I have original AP cylinders rated at 232 bars which I understood was about 19-20 cubic feet.... Who makes 29 cf cylinders for the Inspiration and at what bar is this volume?
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27th December 2005, 01:54	#2 (permalink)
Simon A Escapee from DIY Rebreather's Current Rebreather/s: Inspiration Classic Other Rebreather/s: Not Bought Yet Join Date: Feb 2005 Location: Reading, UK Posts: 337	Re: Inspiration 29cf cylinders? That would be 300bar 3 litre cylinders. If I remember corectly one cubic foot is 27 free litres? 300 * 3 /27 = 33 and a bit cubic foot, but by the time you've accounted for the deviation from Ideal gas laws at that pressure, it's a little bit less than 33 Cubic foot HTH Simon A
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27th December 2005, 02:28	#3 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,095	Re: Inspiration 29cf cylinders? Quote: (Originally Posted by RebreatherDave) Cavesekeer7 on another board wrote this: That particular board is owned by a bunch of male hating radical left wing fascists (ok, so I held back a bit) so I can't ask there.. I have original AP cylinders rated at 232 bars which I understood was about 19-20 cubic feet.... Who makes 29 cf cylinders for the Inspiration and at what bar is this volume? 232 bar 3 liter cylinders are 24.7 cuft (ideal) (25.9 for oxygen)(23.6 for air) 300 bar 3 liters cylinders are 31.8 cuft (ideal) for Air this about 29CF I would not fill oxygen this high! The actual conversion is 1 cuft is 28.3168467 liter at standard temp __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 27th December 2005 at 02:30.
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27th December 2005, 07:12	#4 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Re: Inspiration 29cf cylinders? Ok, so who makes those?
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27th December 2005, 08:49	#5 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,095	Re: Inspiration 29cf cylinders? Quote: (Originally Posted by RebreatherDave) Ok, so who makes those? faber depending on the country it is for they weight between 4.2 and 5kg __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 27th December 2005 at 08:54.
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27th December 2005, 10:12	#6 (permalink)
nigelh New member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 873	Re: Inspiration 29cf cylinders? Quote: (Originally Posted by RebreatherDave) Ok, so who makes those? I have a Faber 3L/300bar cylinder that I use as a clip on air pony when I am Rebreather no-stop diving with somebody on an OC single. It gives me something to hand off if they have a problem. It is almost exactly the same size as the YBOD cylinders but, naturally, I'd have to change the valve to fit it. I confess I wouldn't bother because the little bit of extra duration is insignificant. I fitted a reg on the O2 and I think that buys me far more in a no-stop bailout situation. If it's not no-stop I have a 7L of something along. Oxygen - I have routinely pumped this to 300bar. Slowly and carefully I admit and I clean my own kit but, naturally, that doesn't say it would always work for everybody. __________________ nigelh
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