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Re: Does a empty oxygen cylinder weigh the same full? [Re: Colbadol]
    #6484736 -

LOL well we are getting closer.:D


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"With an abundance of Cyanescens... i would never touch another Cubensis again."

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Re: Does a empty oxygen cylinder weigh the same full? [Re: pscyanescens]
    #6484737 -

Quote:
Does a empty oxygen cylinder weigh the same full?


NO
:snowman:


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Re: Does a empty oxygen cylinder weigh the same full? [Re: pscyanescens]
    #6484745 -

Put empty tank on scale. Record weight.


Put full tank on scale. Record weight.


Compare the numbers.

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Re: Does a empty oxygen cylinder weigh the same full? [Re: pscyanescens]
    #6484754 -

pscyanescens said:





yeah yeah what ever, I'm sure the real question here is where the hell did you get that giant fender pick?

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Re: Does a empty oxygen cylinder weigh the same full? [Re: Stein]
    #6484762 -

Stein said:
pscyanescens said:





yeah yeah what ever, I'm sure the real question here is where the hell did you get that giant fender pick?



?????????????
Well?


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Re: Does a empty oxygen cylinder weigh the same full? [Re: Psilocybeingzz]
    #6484842 -

LOL. I got it from Big Foot.

No.... actually it was brought here by my roommate. He is a strange one, but he did teach me to blow glass. I have no idea where he got it.

Booooom: I have been meaing to do this. But i don't have a scale. I would have to go to my parents house and take one. Never the less i will do this. I was just looking for maybe a little math and equations to give me some answers. I know it will weigh more, but is it going to be noticeable?

I would love to rub some info in the owner of the oxy shops face. I think that facts and mathematical equations would make him listen more. Rather me just saying , i weighed it and the difference is "X"

It still would be good to do ti myslef, but some facts are always nice to throw around.


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"With an abundance of Cyanescens... i would never touch another Cubensis again."

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Re: Does a empty oxygen cylinder weigh the same full? [Re: Boom]
    #6484927 -

Booooom said:
Put empty tank on scale. Record weight.


Put full tank on scale. Record weight.


Compare the numbers.


Do all the oxy tanks that are 249CUFT weigh the same? I think i will weigh a full one first, and then use the oxygen inside it, then weigh the same exact tank empty. This seems a little more practical.


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"With an abundance of Cyanescens... i would never touch another Cubensis again."

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Re: Does a empty oxygen cylinder weigh the same full? [Re: pscyanescens]
    #6484986 -

I dont know why but i couldent log on to the shoomery last night to finish but this is what i came up with.

Well, im usually lazy and that was really just a guesstamate. But for the math, using the molecular weight and doubling it since its O2, 32g/mol, and 1 mol = 22.4 liters, and your tank is rated to 249 cubic foot at 2200 psi.


1 cubic foot of gas at STP = 28.3 liters

22.4 liters = 1 mol o2 = 32g

32/22.4 = 1.4285

1.4285 x 28.3 = 40.43g / cubic foot



Pressure doesnt really matter, because the tanks are rated so that when the tank is filled to X pressure they will hold Y volume of gas.

so for example, a 249 cubic foot tank, at 2200 psi, has 249 cubic feet of gas

but if its only at 1500psi it will have 167.7 cubic feet of gas.


249/2200 = .08

.112 x 1500 = 167.7 cubic feet.



Beware my math, its been a LONG time since i have done gas eqations.

Edited since the cubic feet and pressure was listed.


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Only two things are infinite, the universe and human stupidity. Im not too sure about the former.      -Einstein

Of course the rules need to be enforced, but the goal of law and order should be to create a just society, not to enforce laws. -Unknown

“I contend that we are both atheists. I just believe in one fewer god than you do. When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.”  -Stephen Roberts

Edited by ThirdEyeOpening (01/22/07 08:52 AM)

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Re: Does a empty oxygen cylinder weigh the same full? [Re: Asante]
    #6485076 -

Wiccan_Seeker said:
LOX is an oxidizer, it needs a reducer to become a rocket fuel. Its specific impulse derives from the combustion reaction.

LOX + powdered lead has a lousy specific impulse
LOX + methylhydrazine has a staggering specific impulse

It's not the LOX its the interaction of both.


Yeah man I know :laugh:

I didn't feel the need to go too far into it since the question was about weight rather than applied properties, but you're right, LOX is an oxidizer. However, the high ISP when used with the correct reducer is not worth it IMO... the absurd temps and inherent dangers with using it don't add up enough. :shrug:

My fuel of choice: NH4ClO4 + Al + HTPB binder.... When leaving the effects catalysts out (which doesn't always happen... people like their colored flames :tongue:) you can get specific impulse in the range of 260 seconds :thumbup:

I've heard a little bit about Helium 3, but if I understand correctly that's more for interplanetary travel, not exactly my field. :smile:

Edited by ApJunkie (05/04/07 12:33 AM)

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Re: Does a empty oxygen cylinder weigh the same full? [Re: ApJunkie]
    #6486699 -

What do you do for a living? Do you work with NASA?


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"With an abundance of Cyanescens... i would never touch another Cubensis again."

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