PistenBully 600

[MOC] Liebherr 280 EC-H tower crane 1:18

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Hello, my current project is the realization of a Liebherr tower crane 280 EC-H in 1:18 scale.

This is my second tower crane after the Liebherr 250 EC-B https://www.eurobricks.com/forum/index.php?/forums/topic/154240-moc-liebherr-250-ec-b-towercrane-118/

I wanted the crane to be modular and scale and it should be functional as well, of course.

Because both cranes can be mounted on the same tower system, I was able to use the tower and undercarriage of the 250 EC-B and just copied these. This results in a tower height of 172 cm for each crane, but the tower sections can also be combined to get an even higher tower.

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The counter jib consists of three sections and is built modular. When the crane is erected with a short jib, a two sectional counter jib is used. But when the crane has a long jib, it needs a long counter jib.

The main jib consists of a jib heel section and several short or long intermediate jib sections. At the end, there can be a short or a long head section.

The two-line hook and trolley are the same as used for the 250 EC-B.

The Tower top was quite difficult to build. It is in the shape of a pyramid and this is difficult to build in Lego. In addition, it has to carry much weight and force as both jibs are connected to it. Finally, it has a height of 50 cm, it is stable and has the same lattice geometry as the real machine.

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The most challenging part of the crane was the crane head. It contains the turntable and the cab with all electricity and connects the tower, the tower top, the jib and counter jib. So it has to be very strong, especially the turntable und all mounting points. The cab was created by using the Lego Digital Designer.

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For the turntable I used a new technic turntable and a bearing build out of tiles and plates. This creates quite a lot of friction but there is almost no clearance and the connection is solid.

 

That’s it for the building process. Now some data about the crane:

The turntable is powered by two L-motors. The hoist winch uses one XL-motor and the trolley winch uses one M-motor. All motors are controlled by an S-Brick mounted in the cab and powered by an AAA battery box hidden beneath the cab.

With a height under hook of 105 cm the total height is about 157 cm. But the crane can be mounted with a higher tower as well. I will test this on the next exhibition in June.

The length of the counter jib is between 86 cm (two sections) and 115 cm (three sections).

The main jib can have a maximum length of 272 cm. In this configuration, the total length reaches 400 cm. A jib length of 313 cm creates an overall length of 441 cm but this is not reasonable any more.

With a length of 272 cm the jib is stable and quite straight. It bends only a little near the head section.

Theoretically, this crane is also able to climb by itself, as the 250 EC-B can do, but it is just too big and heavy so I will not test this.

 

Now here are some pictures of the model, first with 110 cm height under hook, short counter jib and 200 cm jib.

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And here are a few pictures showing the crane with its full 272 cm jib and 400 cm total length.

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Edited by PistenBully 600

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Part two - I am very sorry but I can not say why the pictures are not visible. I posted the links instead, so you can see the crane.

For comparison, I placed the chassis of the Lego mobile crane 42009 next to it:

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Here are some pictures of both tower cranes:

Liebherr 250 EC-B with 116 cm height under hook and 180 cm jib

Liebherr 280 EC-H with 136 cm height under hook and 200 cm jib

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I hope you like the model, please leave a comment.

Edited by PistenBully 600

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That thing's humungous! Are there any yellow parts left, well, anywhere?

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You really have lots of bricks (and beams and space); it's huge *huh* I think it is great challenge to build something that big :thumbup:

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I'm guessing you like cranes then. That's quite a build, would love to see a video of how you put it together. Impressive scale.

H

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As a fellow crane-lover, I must comment.  Excellent, as others have said, but specifically in the balancing.  Balancing is so important for these large cranes, and working with ABS makes it all the more difficult.  Although Technic bricks are quite strong, when we are looking at piece counts this huge the weight really adds up.  Kudos to you for making this work all so well. 

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On 2/20/2018 at 12:09 PM, Horace T said:

I'm guessing you like cranes then. That's quite a build, would love to see a video of how you put it together. Impressive scale.

H

I have great respect for cranes, and like them, but have very limited space, so I control myself not to start building one... This Liebherr is impressive indeed 

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Posted (edited)

Last Sunday the Liebherr 280 EC-H has been assembled outdoors. The Liebherr crawler crane LR 1750, built by a friend of mine has been used to erect the tower crane. The crawler crane has been mounted with a height of 280 cm.

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When the LR 1750 was fully erected, the assembly of the 280 EC-H started. At first the tower and cabin were lifted:

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Next the counter jib was pre-assembled on the ground and lifted into position:

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The jib has also been pre-assembled on the ground, also the trolley and the hook were mounted and the trolley winch has been reeved before the whole 270 cm long jib has been lifted and mounted to the crane head.

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After adding the counterweights the hook block has been reeved. Then the assembly was finished and the crane started work.

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In this configuration the 280 EC-H has a total height of 225 cm, a jib length of 270 cm and a total length of 400 cm.

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Here you can see a video showing the erection of both cranes:

The whole procedure took about 6 hours und it was much fun for us. The LR had no problems lifting the components with a weight of up to 2 kilograms. And fortunately the wind was no problem for the cranes, too.

Edited by PistenBully 600

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2 Awesome cranes! Great job both of you!

Any close up of the smaller crane on the ground?

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The crane was part of the Lego exibition "ABSolutSteinchen" in St. Augustin this year. The 280 EC-H was assembled with 270 cm jib, 400 cm total length ans more than 250 cm height.

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