Subject:
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Re: new jack
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 5 Mar 2003 11:25:35 GMT
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Viewed:
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1404 times
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"Jennifer Clark" <jen@vulture.dmem.strath.ac.uk> wrote in message news:HB9vr0.64x@lugnet.com...
> To clarify the notion of simultaneous movement I mentioned, I saw an example
> this morning where the two boom sections similar to that designed by Pixel
> was driven by a single hydraulic cylinder, and linkages kept the two parts
> at equal angles to the horizontal. The two independent movements is probably
> smarter looking though.
these two different designs have different functionality
when two parts of boom are driven indepandantly
the man in the basket can be send out of the circle of turntable
that is why on one of my movie the basket escapes out of screen
so the machine dosn't have to be exactly under the let's say bridge
it can be a liitle bit nearof course in mximal upper range the basket is
exactly above the fulcrum (i suppose because of stability)
in the application wher both parts of boom are dependent to one piston
the operator in the basket is (more or less)
always above the same point on the ground
pixel
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Message is in Reply To:
 | | Re: new jack
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| "Paul Krieg" <pdkrieg@epix.net> wrote in message (...) Thanks Paul, interesting indeed! I had no idea that those machines were difficult to drive in a straight line, although I have seen one which had very large and bold arrows indicating which (...) (21 years ago, 5-Mar-03, to lugnet.technic)
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