Subject:
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Re: 4 section boom
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 17 Jan 2005 01:15:06 GMT
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Viewed:
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2998 times
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In lugnet.technic, Vineet Honkan wrote:
> Is this why on those big cranes (Demag AC 500) there are a small set of wisible
> pulleys on the ouraaise left side of the boom? Thanks.
Nope, those are cables for the various sensors that have to reach up to the boom
tip. Modern cranes like the AC500 have the ability to extend each segment
separately. They use a hydraulic ram inside and a series of locking devices. If
you listen while such a crane is extending it's boom you can hear a loud click
as each section is locked in place, and the ram is retracted to extend the next
one.
> Thanks for the drawing. Very helpful!
No problem!
ROSCO
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Message has 1 Reply:
 | | Re: 4 section boom
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| (...) This series of pictures shows an AC100 extending it's boom one section at a time: (5 URLs) ROSCO (20 years ago, 17-Jan-05, to lugnet.technic, FTX)
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Message is in Reply To:
| | Re: 4 section boom
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| Is this why on those big cranes (Demag AC 500) there are a small set of wisible pulleys on the ouraaise left side of the boom? Thanks. Thanks for the drawing. Very helpful! Keep on building cranes! (20 years ago, 17-Jan-05, to lugnet.technic)
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