Scott 5.5. 5500 psi scba tanks solution to 4500 psi guns

There are such diminishing returns when running HPA much above 3500 psi don't see the effort worth while.

If you are seeking such power ... BURN some gun powder leaving the air guns to be what they are.

Exactly

Been saying it for years that 4500 psi is not and will never be practical. 

How do you expect to fill your tank to 5500 psi? Most compressors only go to 5000 psi. 

The VanDerWaals effect made me rethink the need to fill any of my tanks to 4500psi, and now maybe even keep under 4000psi.

Definitely diminishing returns past 3500psi.

The VanDerWaals effect made me rethink the need to fill any of my tanks to 4500psi, and now maybe even keep under 4000psi.

Definitely diminishing returns past 3500psi.

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Enlighten us. What is the VanDerWaals effect? Does the Covid vaccine protect us from it?

Reedmosser, I understand your reasoning as I have been looking into this lately for somebody else. It just doesn't really seem to be worth going to really mega hpa sources when you can just boost the air from any regular tank and not worry about a whole new category of burst discs and pressure fittings. The boosters are as necessary for big bore Airguns as are chronographs are for pcp's, in my opinion. You really are going to have to use them or you are not going to get jack for refills even from a 5500psi tank, so why bother with the added problems of a new pressure plateau? You have the tank already, but you don't need to, and probably shouldn't, go down the rabbit hole you are heading into. Just get an Extreme or Altaros booster and boost regular hpa air levels to what you want. Get some regular old scuba tanks (cheap) to boost fill you Scott. Take your Scott out hunting for a refill but definitely use your booster for everything else.

My ancient chain drive Shoebox will fill to 6000psi. 

Ask me how I found that out..........

The VanDerWaals effect made me rethink the need to fill any of my tanks to 4500psi, and now maybe even keep under 4000psi.

Definitely diminishing returns past 3500psi.

Click to expand...

Enlighten us. What is the VanDerWaals effect? Does the Covid vaccine protect us from it?

Click to expand...

Air molecules start to interact with each other at very high pressures. Behavior becomes less like an ideal gas. At lower pressures (>3500psi), we get close correlation between pressure and volume. By 12,000psi, air is probably as dense as water, and does not really want to compress any further, regardless of the pressure.

There is a lot of room between 5000psi and 12000psi. I don't disagree that at some point there will be diminishing returns, but it will be different for each shooter. I have a couple of 3600psi bottles on Condors and would enjoy a bit more usable air between my normal 4400-4500 fill of a Great White and the amount it takes to top those off a few times. 

There is a lot of room between 5000psi and 12000psi. I don't disagree that at some point there will be diminishing returns, but it will be different for each shooter. I have a couple of 3600psi bottles on Condors and would enjoy a bit more usable air between my normal 4400-4500 fill of a Great White and the amount it takes to top those off a few times.

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That's all true. It becomes less practical at the higher pressures, but doable. I like to have 4500psi bottles on my heavier guns as at least I then have the option of the few more shots. For aluminum/titanium/steel, above those pressures, it's probably better to increase volume rather than pressure, as you end up with a lower weight system. Not sure for the carbon fiber.

I am going the booster pump route. I might cry once and buy a commercial booster for fire company's. If I do it is easy to get one up to 6000 psi. I love the sport and do need a little bump in performance and what is going on at African air ordinance is a huge improvement over stock. I'm into hunting and looking for the flatest trajectory with decent b.c.. booster pumps seem to be a basic reliable and rebuildable.

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https://www.altaros.cz/en/compressors/160-altaros-double-booster-b2b-edition-bottle-bottle.html

Bear with me you imperial impared folks!!!

1 m3 = 1000 liters of air weighs @1 kilo

So lets say we have a 10 liter bottle of air at 300bar = 3 kilos of air. Those molecules can not be compressed so in essence the 10 liter bottle is now a 7 liter bottle above 300 bar air!

1000 liters = 264 US gallon'

264 gallon at free pressure to some 4350psi equals 2.64gallon. Yet the airmolecules are still all there and occupies the same amount 0.792gallon.

So now the "free" air is only 1.85gallon, the rest is used by the compressed airmolecules.

Does thes makes scense?



The higer you compress the less you get for the same amount of pressure.

Bear with me you imperial impared folks!!!
...

264 gallon at free pressure to some 4350psi equals 2.64gallon. Yet the airmolecules are still all there and occupies the same amount 0.792gallon.

So now the "free" air is only 1.85gallon, the rest is used by the compressed airmolecules.

Does thes makes scense?

Click to expand...

"264 gallon at free pressure to some 4350psi equals 2.64gallon...."

It makes sense. but what do you mean by "free pressure"? Do you mean 1 bar?

so, 264 gallon at 1 bar (14.7psi) to some 300 bar (4350psi) equals 2.64gallon?

2.64gallon seems about right for 1 bar compressed to 100bar, but not for 1 bar compressed to 300 bar.