Subject:
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Re: Crane Steering
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 2 Mar 2005 23:48:52 GMT
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Viewed:
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3049 times
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In lugnet.technic, Steve Lane wrote:
> In lugnet.technic, Keith Hui wrote:
>
> > I believe trailers (that you tow around) don't bother with that at all. Just a
> > bunch of wheels, who cares if they wear down 'cause they don't follow the line
> > perfectly? They get retreaded again and again anyway...
> >
> > But self-propelled trailers? That's a first. Any details on those?
> >
> > Keith
>
> SPMT's (self propelled modular trailers)
>
> try
>
> http://www.mammoet.com/index.asp?m_id=5&s_id6=1&page=../equipment/info.asp
>
> and click on transport
Their steering is hydraulic and computer controlled (as is their suspension),
each axle can be turned individually. This allows them to be tethered together
in many configuration, end-to-end or side-by-side, or combinations, and all
controlled as one unit. They can be set to steer just about any direction you
could ever need, the angles are ackerman corrected, but by a computer, not a
linkage.
The suspension is active, hydraulics lifting/lowering the wheels individually.
As well as raising/lowering the carrier bed for loading/unloading, they are able
to correct for uneven and sloped surfaces.
They are truly amazing machines to watch, but they won't break any speed records
;)
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=26655
ROSCO
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Message has 1 Reply:
 | | Re: Crane Steering
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| (...) If you think about it a normal bog standard trailer has 4 wheels one at each corner, like a table has legs. This is a very stable configuration. If you built a six line modular trailer from lego (12 stub axles, 24 tyres, 12 cylinders) you (...) (20 years ago, 3-Mar-05, to lugnet.technic)
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