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Nice crane Duq!
I'll be really interested in details of your "two stage" boom mechanism!
Just one question, does the hook "cable" just go straight up, or is it fed
through pulleys in the boom sections, so it automatically extends as the
boom extends?
ROSCO
Duq <Duq@nlgateway.net> wrote in message news:G9CA6r.AD4@lugnet.com...
> Hi all,
>
> after a few months of building, rebuilding, rebuilding.... I decided my
> mobile crane is ready for publication. I haven't had the time to make a
> decent site about it, so I've posted some pics here:
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=2810
>
> It's 51cm long and 14,5cm wide. Impressive, until you park it beside the
> Silver Champ....
> With the boom -which is a 3-piece btw- fully extended it's 104cm high,
> beating my daughter by two inches....
> It's a 5-axle crane. Two axles are motorised, the other 3 steer. Nearly
> everything is motorised on this crane: Driving, Steering, Turning the
> superstructure, Lifting the boom, Extending the boom and Lifting the hook.
> The only manual functions are extending the outriggers and extending the
> counterweight.
> I used some pictures of a DEMAG 120 crane for dimensions, but the crane is
> not a model of that crane. One of the most difficult parts of the design • was
> the mechanism to lift the boom. To lift it high enough you need to push it
> up pretty close to the pivot point. From physics you might remember that
> that means it's pretty heavy, especially since the boom already weighs a
> pound.... In the end I came up with a very ingenious two-stages mechanism.
> It's hard to explain, once I've got the right software I'll do some • pictures
> of it.
> To show of it's capacity I lifted the X-wing fighter that was sitting on a
> shelf.
>
> In time I'll put up a site with better pics.....
>
> Duq
>
>
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Message is in Reply To:
 | | New MOC: Mobile Crane
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| Hi all, after a few months of building, rebuilding, rebuilding.... I decided my mobile crane is ready for publication. I haven't had the time to make a decent site about it, so I've posted some pics here: (URL) 51cm long and 14,5cm wide. Impressive, (...) (23 years ago, 26-Feb-01, to lugnet.build, lugnet.technic) !
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