Subject:
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Re: SSClagorpion - Compressor
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 20 May 2004 22:00:37 GMT
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Viewed:
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18269 times
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In lugnet.technic, David Laswell wrote:
> In lugnet.technic, Kevin L. Clague wrote:
> > In lugnet.technic, Steve Hassenplug wrote:
> > The large pumps expand and contract more slowly than small pumps.
> > Certainly the circumference of the seals is longer on large pistons than
> > small pistons, therefore increasing friction, but I don't think that is
> > enough to explain the difference.
>
> Airflow is what causes this. The two pumps both hook up to the same size hoses
> with the same size nipples, but an identical length of stroke on the larger pump
> is pushing quite a bit more air than the small pump. There's a limit to how
> fast air will flow through that nipple, so the larger the pump's bore, the
> slower it will close when the same force is applied to the shaft.
That is absolutely right. Nice one David.
It makes me think we could have high preformance pistons by playing with the
variables at both ends. In practice, a boring out of the nipple hole diameter is
like what boosted the horse power in my Corvette motor by boring out the block
.030 over.
e
(though I would never mod Lego. Unless it was Hi-Technic surplus)
;)
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Message has 1 Reply:
 | | Re: SSClagorpion - Compressor
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| (...) I think Kevin has the right idea with racking up a whole bunch of pumps on the same motor. If everything pumps into one air tank anyways, you're going to be restricted to what can go through a single nipple, but there's no reason why you can't (...) (20 years ago, 20-May-04, to lugnet.technic)
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Message is in Reply To:
| | Re: SSClagorpion - Compressor
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| (...) Airflow is what causes this. The two pumps both hook up to the same size hoses with the same size nipples, but an identical length of stroke on the larger pump is pushing quite a bit more air than the small pump. There's a limit to how fast (...) (20 years ago, 17-May-04, to lugnet.technic)
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