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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Fri, 18 Nov 2005 05:05:02 GMT
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Viewed:
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4570 times
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In lugnet.technic, Andrew Meyer wrote:
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I am comtemplating the purchase of one of those one-way valves from the old
pneumatic sets. I was wondering, if you set up a system in which one tank was
pressure and one was vacuum, and applied both to a 2-cyl engine, would it turn
with more power than a regular engine? What I mean to describe is an engine
that is similar to the 90d phase shift 2 cyl engine that you can find on Dr.
C.S. Soh’s pneumatics page, reworked so that when one side of a cylinder had
pressure applied, the other would be connected to vacuum. I realise this would
involve two switches per cyl, instead of one,
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Sort of like a DPDT reversing switch arrangement? However, if you study how the
LEGO pneumatic valve is built you know it’s not going to work. Namely, it has a
fourth exhaust port that’s inaccessible. You’ll have to plug up this port for
your idea to work. Else compressed air and vacuum (?) would be leaking from the
tanks all the time. And the one-way valve blocks wouldn’t be of any help.
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Would the extra power from the cyl be enough to drive the extra
resistance of the added switches, and end up with more power than a
traditional engine, or would I be better off just sticking to the traditional
engine and just feeding it more air faster?
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Better to stick to the traditional engine. And if you simply want a faster
engine, don’t bother to use the double acting cylinders - they’re too stiff (You
could use FT cylinders though). Use the older type single acting cylinders. The
fastest engine I’ve built so far is based on Paul Krieg’s Two Single-Acting
Cylinder Opposed design.
CSSoh
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Message has 1 Reply:
 | | Re: Pneumatic Questions
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| In lugnet.technic, Andrew Meyer wrote: "...if you set up a system in which one tank was pressure and one was vacuum, and applied both to a... 90d phase shift 2 cyl engine... so that when one side of a cylinder had pressure applied, the other would (...) (19 years ago, 18-Nov-05, to lugnet.technic, FTX)
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Message is in Reply To:
| | Pneumatic Questions
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| I am comtemplating the purchase of one of those one-way valves from the old pneumatic sets. I was wondering, if you set up a system in which one tank was pressure and one was vacuum, and applied both to a 2-cyl engine, would it turn with more power (...) (19 years ago, 17-Nov-05, to lugnet.technic)
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