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> Well, you can certainly pump air into a blue air tank [...]
> Now try to *store* vacuum in one or more of the blue air tanks [...]
Now things get a little philosophical :)
The air tank itself has no idea about vacuum or pressure. The only thing
the tank stores is a pressure difference. The difference between the outer
pressure and the inner presure. This difference might be positive or
negative.
In case of positive difference ("high pressure") the only limit for the
system is the point where the tubes drop from the pumps because the presure
gets too high.
In case of negative difference ("vacuum") the outer air pressure will press
the tubes (whats the english word for it? You know, the flexible things
between the pump and the valves etc...). Might be, outer pressure will in
the end bring the inner diameter of the tube to zero.
I don't have a single acting pump to experiment with vacuum, but I think
the main problem is that the technic system is developed for high pressure,
so it will be more effective on that.
It could be interesting to experiment with a stiff tube that can not be
shut by outer air pressure to increase vacuum efficiency.
Mike
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Message has 1 Reply:
 | | Re: Pneumatics: the old and the new
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| (...) You cold use the "stylish" hard plastic tubing that came with a lot of Technic sets in late '90ies and also act's as outer hose for flexi cables. Of course you'll still need small portions of pneumatic hoses but at least the amount is limited. (...) (22 years ago, 2-Mar-02, to lugnet.technic)
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Message is in Reply To:
| | Re: Pneumatics: the old and the new
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| Hi there, Rob That thread led to an extensive discussion into the depths of "vacuum storage". It would appear that storing compressed air is no problem but 'the whole concept of "storing vacuum" is a little disturbing.' Well, you can certainly pump (...) (22 years ago, 2-Mar-02, to lugnet.technic, lugnet.robotics)
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