- #1
Carlos4558
- 5
- 0
Hia, I am not a student, I am a gas engineer in the UK. Had a thought and tried out some theory but didn't get very far.
Basically; if a helium balloon rises in air as it is lighter than the air it displaces, what if I could get a tube (say internal dimensions of 15mm in diameter and 1000mm long making a volume of 0.177m^3 (ish)) and create a vacuum within it. obvously serous levels of vacuum would be difficult to achieve so I am not looking to go too far down with it.
(oh and in case your wondering why I picked a tube, I figure it's easier to work with than a sphere, less likly to collapse. Can't remember why, I think that's how it works. (and if it works it'll be more fun to play with!)
Can anyone help me pick a suitable material to make the tube from? Any ideas how thick the wall would need to be etc...
Oh and a thought I've had just this seond. If I filled the tube with helium then vacuumed that out, then the bits I can't be bothered to wait for would be ligher than air anyway.
Any help would be greatly appreciated.
Basically; if a helium balloon rises in air as it is lighter than the air it displaces, what if I could get a tube (say internal dimensions of 15mm in diameter and 1000mm long making a volume of 0.177m^3 (ish)) and create a vacuum within it. obvously serous levels of vacuum would be difficult to achieve so I am not looking to go too far down with it.
(oh and in case your wondering why I picked a tube, I figure it's easier to work with than a sphere, less likly to collapse. Can't remember why, I think that's how it works. (and if it works it'll be more fun to play with!)
Can anyone help me pick a suitable material to make the tube from? Any ideas how thick the wall would need to be etc...
Oh and a thought I've had just this seond. If I filled the tube with helium then vacuumed that out, then the bits I can't be bothered to wait for would be ligher than air anyway.
Any help would be greatly appreciated.