What the....

***Beanie*** · 11th December 2007, 12:40

is that for real?
Mini Compressors 4200 PSI x 2, 24Volt on eBay, also, Cylinders Tanks, SCUBA Snorkelling, Sporting Goods (end time 16-Dec-07 21:43:43 GMT)
290 bar but at tiny LPM?

**PhilSiswick** · 11th December 2007, 12:44

Quote: (Originally Posted by Beanie)

is that for real?
Mini Compressors 4200 PSI x 2, 24Volt on eBay, also, Cylinders Tanks, SCUBA Snorkelling, Sporting Goods (end time 16-Dec-07 21:43:43 GMT)
290 bar but at tiny LPM?

Might be very suitable for 3l cylinders

Dutchy · 11th December 2007, 12:57

Could be for real. HiPPAG's are in use in (military) aircrafts iso bottles of air. The stationary HiPPAG reduces turn around time. They are made for continuous use so duty cycle isn't a bottleneck whereas it would be for a typical pump.
Just a rough guess here but I think it'll do inbetween 5 and 20 liters/minute. On the bottom end that makes 2 hours for an empty three liter. On top of that spares could prove to be expensive.
Edit:
I'm puzzled by the motor. I expect it to be high voltage (200V) high frequency (400Hz) because that would make electrical parts lighter. Could be that this is different either because military crafs have a different electrical plan or because it's allready been modified.

***Beanie*** · 11th December 2007, 13:00

in that case nice do you think that they would run for days filling some Js (50l) cylinders

**PhilSiswick** · 11th December 2007, 13:00

Quote: (Originally Posted by Dutchy)

Could be for real. HiPPAG's are in use in (military) aircrafts iso bottles of air. The stationary HiPPAG reduces turn around time. They are made for continuous use so duty cycle isn't a bottleneck whereas it would be for a typical pump.

So they are better for topping up, rather than pumping from empty (not an issue, just a question). Do you think they would be usable for O2 and for boosting?

Cheers,

**nigelh** · 11th December 2007, 13:24

Quote: (Originally Posted by PhilSiswick)

So they are better for topping up, rather than pumping from empty (not an issue, just a question). Do you think they would be usable for O2 and for boosting?

Probably not.
If they are designed to take input at 1 bar you can't stuff pressurised gas in or it all locks up.

The problem with stuff like that is aerospace costs on spares.
I'd love to have one to play with but I wouldn't expect it end up being any use.

**PhilSiswick** · 11th December 2007, 13:40

Quote: (Originally Posted by nigelh)

Probably not.
If they are designed to take input at 1 bar you can't stuff pressurised gas in or it all locks up.

The problem with stuff like that is aerospace costs on spares.
I'd love to have one to play with but I wouldn't expect it end up being any use.

Thanks - shame. Back to the drawing board ;-)

Cheers,

Dutchy · 11th December 2007, 13:41

Quote: (Originally Posted by Beanie)

in that case nice do you think that they would run for days filling some Js (50l) cylinders

I wouldn't. I just dug up specs for one used in launching missiles. That's intermittent use. The ones in use for cooling would probably just do what you suggest.

Quote: (Originally Posted by PhilSiswick)

So they are better for topping up, rather than pumping from empty...

Less to fill = faster

Quote: (Originally Posted by PhilSiswick)

Do you think they would be usable for O2 and for boosting?

O2 naaah. They were not designed to do that so I wouldn't period.

I'd like to know what happens inside the thing...
How does it dispose of condensing water when used in below zero conditions?
Is it oil free? (helpfull when operating conditions vary that much) If so how many hours is it rated for? etc etc etc

SimonK · 11th December 2007, 18:24

Might be for cooling a Thermal Imager on an armoured vehicle, hence the 24V supply. They would be redundant now since modern TIs have the cooling built in.

Simon

Dutchy · 11th December 2007, 19:56

Quote: (Originally Posted by SimonK)

Might be for cooling a Thermal Imager on an armoured vehicle, hence the 24V supply. They would be redundant now since modern TIs have the cooling built in.

Simon

I guess I'm preoccupied with planes

11th December 2007, 12:40	#1 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	What the.... is that for real? Mini Compressors 4200 PSI x 2, 24Volt on eBay, also, Cylinders Tanks, SCUBA Snorkelling, Sporting Goods (end time 16-Dec-07 21:43:43 GMT) 290 bar but at tiny LPM? __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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11th December 2007, 12:44	#2 (permalink)
PhilSiswick WSKD 0001 Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 923	Re: What the.... Quote: (Originally Posted by Beanie) is that for real? Mini Compressors 4200 PSI x 2, 24Volt on eBay, also, Cylinders Tanks, SCUBA Snorkelling, Sporting Goods (end time 16-Dec-07 21:43:43 GMT) 290 bar but at tiny LPM? Might be very suitable for 3l cylinders __________________ Phil No comment on open circuit... it's an evolutionary dead end not really worth discussing here. Dave Sutton, 2007 I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 www.hugsac.org.uk
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11th December 2007, 12:57	#3 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 730	Re: What the.... Could be for real. HiPPAG's are in use in (military) aircrafts iso bottles of air. The stationary HiPPAG reduces turn around time. They are made for continuous use so duty cycle isn't a bottleneck whereas it would be for a typical pump. Just a rough guess here but I think it'll do inbetween 5 and 20 liters/minute. On the bottom end that makes 2 hours for an empty three liter. On top of that spares could prove to be expensive. Edit: I'm puzzled by the motor. I expect it to be high voltage (200V) high frequency (400Hz) because that would make electrical parts lighter. Could be that this is different either because military crafs have a different electrical plan or because it's allready been modified. __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007 Last edited by Dutchy : 11th December 2007 at 13:20. Reason: Motor info
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11th December 2007, 13:00	#4 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	Re: What the.... in that case nice do you think that they would run for days filling some Js (50l) cylinders __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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11th December 2007, 13:00	#5 (permalink)
PhilSiswick WSKD 0001 Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 923	Re: What the.... Quote: (Originally Posted by Dutchy) Could be for real. HiPPAG's are in use in (military) aircrafts iso bottles of air. The stationary HiPPAG reduces turn around time. They are made for continuous use so duty cycle isn't a bottleneck whereas it would be for a typical pump. So they are better for topping up, rather than pumping from empty (not an issue, just a question). Do you think they would be usable for O2 and for boosting? Cheers, __________________ Phil No comment on open circuit... it's an evolutionary dead end not really worth discussing here. Dave Sutton, 2007 I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 www.hugsac.org.uk
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11th December 2007, 13:24	#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: 824	Re: What the.... Quote: (Originally Posted by PhilSiswick) So they are better for topping up, rather than pumping from empty (not an issue, just a question). Do you think they would be usable for O2 and for boosting? Probably not. If they are designed to take input at 1 bar you can't stuff pressurised gas in or it all locks up. The problem with stuff like that is aerospace costs on spares. I'd love to have one to play with but I wouldn't expect it end up being any use. __________________ nigelh
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11th December 2007, 13:40	#7 (permalink)
PhilSiswick WSKD 0001 Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 923	Re: What the.... Quote: (Originally Posted by nigelh) Probably not. If they are designed to take input at 1 bar you can't stuff pressurised gas in or it all locks up. The problem with stuff like that is aerospace costs on spares. I'd love to have one to play with but I wouldn't expect it end up being any use. Thanks - shame. Back to the drawing board ;-) Cheers, __________________ Phil No comment on open circuit... it's an evolutionary dead end not really worth discussing here. Dave Sutton, 2007 I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 www.hugsac.org.uk
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11th December 2007, 13:41	#8 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 730	Re: What the.... Quote: (Originally Posted by Beanie) in that case nice do you think that they would run for days filling some Js (50l) cylinders I wouldn't. I just dug up specs for one used in launching missiles. That's intermittent use. The ones in use for cooling would probably just do what you suggest. Quote: (Originally Posted by PhilSiswick) So they are better for topping up, rather than pumping from empty... Less to fill = faster Quote: (Originally Posted by PhilSiswick) Do you think they would be usable for O2 and for boosting? O2 naaah. They were not designed to do that so I wouldn't period. I'd like to know what happens inside the thing... How does it dispose of condensing water when used in below zero conditions? Is it oil free? (helpfull when operating conditions vary that much) If so how many hours is it rated for? etc etc etc __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007
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11th December 2007, 18:24	#9 (permalink)
SimonK Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2005 Location: Cumbria UK Posts: 231	Re: What the.... Might be for cooling a Thermal Imager on an armoured vehicle, hence the 24V supply. They would be redundant now since modern TIs have the cooling built in. Simon
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11th December 2007, 19:56	#10 (permalink)
Dutchy SK#007 Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: Apr 2006 Location: Nieuwegein (The Netherlands) Posts: 730	Re: What the.... Quote: (Originally Posted by SimonK) Might be for cooling a Thermal Imager on an armoured vehicle, hence the 24V supply. They would be redundant now since modern TIs have the cooling built in. Simon I guess I'm preoccupied with planes __________________ = This post is environmentally friendly. It is composed of 100% recycled electrons only. = SK #007
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