Subject:
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Re: Pneumatic Questions
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 19 Nov 2005 16:21:48 GMT
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Viewed:
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4469 times
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In lugnet.technic, Kevin L. Clague wrote:
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When using traditional pressure only, the force producde by the air pressure
on the faces of the pistons is enough to flip a switch.
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Just so.
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Just yesterday someone asked me “If instead of using pressure, you used
vaccume” would your walker walk backwards. I’d never thought of this, but it
sounds like an interesting concept. My initial reaction was that there would
phase issues that would prevent this from working.
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No, it wouldn’t walk backwards. To make it work, you’d only have to interchange
the hoses at the switches. That’s because a suction force acts in the opposite
direction to the traditional compressed air. Your walker will then walk forwards
as before, notwithstanding it is now running on vacuum (suction force would be
better word).
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But you are talking about a different case. Lets ask a slightly different
question than yours. Could I make a pneumatic engine like Dr. Soh’s that runs
purely on vaccume? I think the answer is yes.
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Most certainly! Again, you’d only have to interchange the hoses at the switches.
Connect the air intake line to your suction source. The old type pump and
one-way valve block will do but you’ll have to pump vigorously coz it’s hard to
get a decent vacuum with it. Maybe a vacuum cleaner?
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So the pressure half of the engine has enough power to flip one switch, and
the vaccume half of the engine has enough power to flip another switch.
Combined then, it would seem that you could make both switches flip.
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I believe he wants compressed air on one side and suction on the other side of
the piston of a cylinder at the same time to make his engine really go.
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Let us know how it turns out!
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perpetual motion :-)
CSSoh
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Message is in Reply To:
 | | Re: Pneumatic Questions
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| (...) This is a good question. When using traditional pressure only, the force producde by the air pressure on the faces of the pistons is enough to flip a switch. Just yesterday someone asked me "If instead of using pressure, you used vaccume" (...) (19 years ago, 17-Nov-05, to lugnet.technic)
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