Subject:
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RE: "real" LEGO Hovercraft ? (with/without batteries/RCX "onboard")
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 29 Nov 2002 17:34:59 GMT
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Original-From:
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Jim Choate <ravage@einstein.ssz.SPAMLESScom>
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Viewed:
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636 times
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On Fri, 29 Nov 2002, PeterBalch wrote:
> I just tried
>
> a 5V processor cooling fan
> a 12V computer PSU cooling fan
> a 3V ducted fan of the sort used to cool your face
> (run at 5V without on-board batteries)
>
> with a 16cm dia polystyrene plenum.
>
> None could really lift their own weight - although the processor cooling
> fan just became a little easier to move.
Get rid of this fixation with 'lift own weight' (you're -completely-
ignoring the -primary- factor of time). Consider the exhaust of a
car, pump it into a bag and you can lift the car to change the tire but
you can stop the car by simply sticking your hand over the end of the
exhaust pipe (don't try this as the exhaust will burn your hand, check
with your mechanic).
Focus on force over area.
--
____________________________________________________________________
We don't see things as they are, ravage@ssz.com
we see them as we are. www.ssz.com
jchoate@open-forge.org
Anais Nin www.open-forge.org
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