Been thinking about a buddy bottle between 68 an 90 ci

[MarksmanPete]

I would like to know what to expect fill count on a 1.12 liter/68 cubic inch bottle filled to 4500 on a 450cc bottle at 3600 psi, I was wondering if I should go for 1.5 l,iter aka 90ci or will that be a bit too much for hunting wise even with a good bit of misses I think on .25 cal but I dont know, Would like yall opinion I been thinking about this over a day, I dont want to regret buying a size tank which does not suit me as well as another would. Also will be using a 10 inch fill whip to minimize air loss.

 

[Mike_Lenardon]

This should help you out

Airgun Tank Fill Calculator

 

[MarksmanPete]

This should help you out

Airgun Tank Fill Calculator

it says only about 1.3 right so what does that mean first time 3600 okay 2nd time what?. I just need the data like first fill 2nd got to this psi 3rd got to this psi as you dont need to fill it fill to use it 2900 psi is still usable. I dont know I cant seem to find any answers no one seems to know I think il just get the 1.12 liter I hope I aint making a mistake should be good when i think about it but I never filled airgun tank gun is coming though, Dont want to have to run out of air on a few day hunt.

 

[AlanMcD]

If it is telling you 1.3 fills, that means one full fill, and about 30% of a second fill before the air pressure in the tank is equal to the gun's reservoir. You did not say the pressure you refill at, so I don't know what that would be, but for example if you entered that you refill at 2600 psi, then the second fill would get 30% of the way to 3600 psi, so it would end at about 2900 psi . . . . like that.

 

[beerthief]

my question is how many shots to you get on a fill ? then figure how many fills you might need , then what size tank you need . OR practice more and conserve your shots , only pull the trigger when your sure of a kill .

 

[MarksmanPete]

The air loss from the whip is minimal. The hole inside is tiny. Not sure how much air would be saved with a 10" whip vs a 24". I would find it difficult to fill my gun with a 10" whip in the field.

The point at which you would refill your gun is up to you and is usually the point where velocity / accuracy starts to fall off, or just above your regulator pressure if your gun has one. But, the fill point won't change how long the air in your tank will last other than the small amount of air lost when you disconnect the gun from the tank. If you don't need to lug the tank around, then get the biggest tank to get the most fills. If you want to carry the tank in a backpack, then a 90 cubic inch tank might wear you down faster than a 45 cubic inch. Assuming the air in your tank is dry (which it really must be or you will be ruining your tank), don't use any inline filters when filling from the tank. They waste quite a bit of air each time you bleed them.

On your calculations, you might be entering the data incorrectly. This is what I am getting with these numbers:

68 cubic inch tank
Starting at 4500 PSI
Filling airgun to 3600 PSI
Refilling airgun at 2600 PSI
450 CC bottle
----------------------
12.6 Fills

Same numbers but with a 90 cubic inch tank = 16.7 fills.

If your gun still shoots well at 2200 PSI, then you can wait until then to refill it. You will get 11.9 fills from 2200 PSI with a 90 cubic inch tank, but the number of shots from your gun between a 2600 PSI refill point and a 2200 PSI refill point to 3600 PSI each time until your tank runs dry will be roughly the same.

That makes no sense 12 fills what 1000 cc is 1 liter. I still aint buy Im just stuck I really been thinking about it like I dont want to run out of air on a 25 cal aea carbine td just wonder how much shots I would get off a 68 cubic inch vs 90 once I find that or close to that number im buyin a bottle hard to decide I cant gauge it good all I filled was a 180 cc avenger tank an its 4350 not 3600.

 

[MarksmanPete]

Not sure what gun bottle/cylinder/tank you are wanting to fill. Is it a 450cc bottle or a 180cc bottle or do you have both?

Here are the numbers on a 180cc bottle / cylinder on the gun, filled to 4350 PSI, refilled at 2600 PSI: 3 Fills
All numbers the same other than a 90 cubic foot tank - 4 Fills

As you can see if your need to fill to 4350 PSI each time, your refill numbers drop dramatically. Also remember that the volume of air that a tank will hold at 0 PSI at sea level is significantly smaller than the total volume of compressed air it will hold at 4500 PSI.

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On my calculations lists in my last post, sorry about the typo on my part. I put cubic INCHES not CUBIC FEET on the tanks. I was errantly copying what you had typed in your original post.

Yea Im trying to fill 500 cc say from 2200 to 3600 or 450 cc from 2200 to 3600.

 

[AlanMcD]

And he is clearly talking about the common small bottles, which are 68 and 90 cubic inch in capacity (not a typo!). The difference is that these small bottles (and the 1.1 liter one as well) are the measurements of volume the tank holds with no pressure effects (think water volume) - the larger FEET bottles are reporting the amount of air they hold when full, after "expanding" it back to atmospheric pressure (not water volume, but more like 300 times the water volume).

You have to be clear on the units and intent with tanks - it can certainly be confusing. But the OP did not make any typos in his reference to the size of the tanks . . . .

 

[MarksmanPete]

Not how I am reading it based on his most recent post:



That looks to me like he is talking about buying a new 68 or 90 cubic foot large tank to refill 450cc to 500cc bottles on his guns from. Perhaps MarksmanPete can clarify that for us both.

Yup here https://www.aliexpress.us/item/3256....0.0.f1b938daQjm5Wo&mp=1&gatewayAdapt=glo2usa 1.12L 68 ci
https://www.aliexpress.us/item/3256....0.0.f1b938daQjm5Wo&mp=1&gatewayAdapt=glo2usa This is 1.5 L 91 ci
I cant decide weather I want the 1.12 or the 1.5 I will be hunting in climbing elevation probably so weight an bulk matters 1.12 is a bit less bulky thats for sure just dont know if it will give me enough shots I want like 100 shots that should be plenty for hunting squiril to coyotes an checking here an there if its sighted in maybe I think 100 shots would last a good few days or a week if you dont miss a lot. thats like what 12 shots a day. for 7 days. I have zero clue I cant gauge this I only have an avenger no bottle guns yet aea hp varmint is coming.

 

[MarksmanPete]

Are those going to be attached to your airgun or are you going to fill your gun from those? Still not quite getting it. What are you going to use to fill the bottles in the links you provided?

Well obvisously a compressor lol what else would I be doing with them blowing em up with my breath like a ballon I got this valve coming https://www.aliexpress.us/item/3256....0.0.f1b938daQjm5Wo&mp=1&gatewayAdapt=glo2usa for it

 

[MarksmanPete]

Are those going to be attached to your airgun or are you going to fill your gun from those? Still not quite getting it. What are you going to use to fill the bottles in the links you provided?

I am planning on filling em with my yong heng taking em to the mountains in my backpack but I dont know which one would suit me better I dont want to regret a purchase, I just wanna know if I can get like 100 shots out of the 68 cubic inch one out of like aea carbine which is 450 cc at 3600 psi will obviously be refilling when it hits 2200. I dont know sometimes I think about it an I see my self first fill bam I get it to 3600 I think my tank would drop to like what from 4500 down to like 3900? 2nd fill will get the tank down to what 3300 psi? 3rd 2800? Im just guessing. I dont know though sometimes I think 68 cubic inch would be a little too low just no way to gauge I dont have a small bottle and a 400-500cc airgun tank that runs at 3600 psi not at the moment at least.

 

[Trucker3573]

Don’t know much about the aea. Assuming not regulated? So the question is how many good shots do you get from a full 3600 fill ? Either small tank you are looking at should top it one time to that point. So you can double that amount of shots. After that it is a bit of a guessing game. I will say I don’t think you will see a ton of difference between 68 cu in and 90 cu in. Better to be more equipped than necessary and both are small. Might as well buy the bigger one.

 

[MarksmanPete]

Don’t know much about the aea. Assuming not regulated? So the question is how many good shots do you get from a full 3600 fill ? Either small tank you are looking at should top it one time to that point. So you can double that amount of shots. After that it is a bit of a guessing game. I will say I don’t think you will see a ton of difference between 68 cu in and 90 cu in. Better to be more equipped than necessary and both are small. Might as well buy the bigger one.

Both are too small if your just plinking/target work but for hunting 90 ci you dont think thats a little much if your trying to go lightweight cuz compressed air got weight an if I dont end up using it just free bulk and weight i'm carrying around like I cant see my self shooting 120 shots while out huntin unless im missin like crazy thats the thing an I think a 68 will give me like a good 100 shots in .25 cal unregulated an that should be more than enough even for squirrels like if you miss half your shots that's still 50 squirrels.

 

[Trucker3573]

Both are too small if your just plinking/target work but for hunting 90 ci you dont think thats a little much if your trying to go lightweight cuz compressed air got weight an if I dont end up using it just free bulk and weight i'm carrying around like I cant see my self shooting 120 shots while out huntin unless im missin like crazy thats the thing an I think a 68 will give me like a good 100 shots in .25 cal unregulated an that should be more than enough even for squirrels like if you miss half your shots that's still 50 squirrels.

Don’t think the weight difference is significant. That’s just me though.

 

[MarksmanPete]

Don’t think the weight difference is significant. That’s just me though.

Says its .91 kilo and the 90 cubic inch is 1.27 kilo I mean its the bulk of the 90 that always has me double thinking that size when I watch videos of 90 compared to the 68 its fatter a longer not by much but very noticeable it will have an effect an if im carrying it all day or stuffing the backpack it will take up volume an I dont think Il use the 1.5 fully though thats the thing as thats a good bit more should be more than ample in the air department wouldnt it.

 

[MarksmanPete]

Don’t think the weight difference is significant. That’s just me though.

Got a ninja 68 empty No paintball regs so it ran only 135 to the door from ProEdgePB very reasonable price dont know what I was doing looking at aliexpress for a small bottle, Price wise the the smaller ones cost the same or more on aliexpress, Makes no sense for me to buy the china ones when I can get DOT certified bottle for less, Already bought a m18 valve but whatever Il just buy a 2 liter bottle to pair that for that in the near future as sometimes the 3 L is a bit big for a range day, Guess Il just need to purchase another valve in 5/8-18 unf https://www.aliexpress.us/item/3256....0.0.11ad38da72JZxo&mp=1&gatewayAdapt=glo2usa.