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"Klaas H. Meijaard" wrote:
>
> I've seen a website somewhere... A guy has done some real good testing (with
> help of RCX) regarding the performance of several pneum. pumps.
>
> Simple conclusion: the small one from Lego is the best, just use that one and
> leave the large ones with their springs.
I guess I'd better own up to prevent more people wasting their time and
effort trying to remove the spring from the large hand pump.
I think we have all been badly misled by the picture of the Recycler on
the bottom of the RIS 1.0 box which shows the hand pump (with spring
intact) being used as an air compressor.
With or without the spring, the large hand pump performs poorly as a
motorised air compressor. It's great when worked by hand, but that's
what it was designed for.
Btw, pump testing has gone hi-tech at
http://www.geocities.com/cssoh1/pressure/pressure.htm
--
C S Soh
CSSoh's Lego Pneumatics
http://www.geocities.com/cssoh1
... where air is power!
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Message has 2 Replies:
 | | Re: springless pneumatic pump
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| (...) Agree'd, I'd destroyed mine when I snipped off the spring only to have it not work well at all. I have a great 4 pump motor pack now. PSI! Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
| | | Re: springless pneumatic pump
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| Yea, I kinda figured the big punp wasn't too good for the compresor pump. I did see that on your page, but I figured I'd try it anyhow. Part of my problem (and I'm kinda ashamed to say it) is that is actually the only pump I own, large or small. (...) (23 years ago, 30-Apr-01, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: springless pneumatic pump
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| I've seen a website somewhere... A guy has done some real good testing (with help of RCX) regarding the performance of several pneum. pumps. Simple conclusion: the small one from Lego is the best, just use that one and leave the large ones with (...) (23 years ago, 29-Apr-01, to lugnet.technic)
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