Lessthanlethal
Guest
Okay I have another tank Q.What size tank do woman normaly have 62's, 80's. does it mater? I am a small 4'11 female,I am very new to diving so any info would be good
Thanks.
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Thanks.
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tank size
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The Kraken
He Who Glows in the Dark Waters (ADVISOR)
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62's are good for your size, and the HP 80 cf steel tanks are nice too.
The 80's are negatively buoyant and only 20" long.
the K
The 80's are negatively buoyant and only 20" long.
the K
Rainer
Contributor
HP80 might be your best bet. AL80s would be HUGE on you!
OP
Lessthanlethal
Guest
well not knowing I bought AL80s, very big and heavy.. Is their a diffrent with the time I can spend underwater with the diffrent sizes?
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I agree with the above poster --- HP 80s would be perfect for you!
OP
Lessthanlethal
Guest
what is hp 80s? sorry new.
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The Kraken
He Who Glows in the Dark Waters (ADVISOR)
ScubaBoard Supporter
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Oh, yes !!!
Here are some comparisons of SAC/Depth/Time between a 62 and an 80. These figures are approximate and incorporate a residual safety margin of 500 psi.
SAC Rate of 0.4 cfm
@ 40' - 62= 59'; 80= 77'
@ 60' - 62= 46'; 80= 60'
@ 80' - 62= 38'; 80= 50'
SAC Rate of 0.6 cfm
@ 40' - 62= 39'; 80= 51'
@ 60' - 62= 31'; 80= 40'
@ 80' - 62= 25'; 80= 33'
SAC Rate of 0.8 cfm
@ 40' - 62= 29'; 80= 38'
@ 60' - 62= 23'; 80= 30'
@ 80' - 62= 19'; 80= 25'
the K
Here are some comparisons of SAC/Depth/Time between a 62 and an 80. These figures are approximate and incorporate a residual safety margin of 500 psi.
SAC Rate of 0.4 cfm
@ 40' - 62= 59'; 80= 77'
@ 60' - 62= 46'; 80= 60'
@ 80' - 62= 38'; 80= 50'
SAC Rate of 0.6 cfm
@ 40' - 62= 39'; 80= 51'
@ 60' - 62= 31'; 80= 40'
@ 80' - 62= 25'; 80= 33'
SAC Rate of 0.8 cfm
@ 40' - 62= 29'; 80= 38'
@ 60' - 62= 23'; 80= 30'
@ 80' - 62= 19'; 80= 25'
the K
An HP 80 is a cylinder that is rated to hold a higher pressure than a standard cylinder because it has a thicker wall. The "80" part means that it will hold 80 cubic feet of air. That means you can take a room full of air that is 4 1/2 feet long by 4 1/2 feet wide by 4 1/2 feet tall, and it will cram into an 80 cubic foot tank.
When using a high pressure tank (same as cylinder) you can cram the same 80 cubic feet of air into a smaller tank because it will hold more pressure. Think of taking a sponge and setting a can of beans on it. The sponge will get squished down and become shorter. If you put another can on top the sponge will get even shorter still. This is similar to how pressure affect air. It is just that the air that is crammed into the tank is being squeezed from all directions.
When using a high pressure tank (same as cylinder) you can cram the same 80 cubic feet of air into a smaller tank because it will hold more pressure. Think of taking a sponge and setting a can of beans on it. The sponge will get squished down and become shorter. If you put another can on top the sponge will get even shorter still. This is similar to how pressure affect air. It is just that the air that is crammed into the tank is being squeezed from all directions.
OP
Lessthanlethal
Guest
Okay thank you . I looked on line and they are pricey any sugestions for good deal on this kind of tank?
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Rainer
Contributor
Steel is going to be more expensive than AL. Your best bet to save $$$ is to buy used. Check ebay, craigslist, SB, thedecostop, local forums, etc. You could probably get one new HP80 for about what you paid for the AL80s (assuming two new ones).
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