PistenBully 600

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

    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: 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 I hope you like the model, please leave a comment.
  2. 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. 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. 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. 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. And here are a few pictures showing the crane with its full 272 cm jib and 400 cm total length.
  3. [MOC] Liebherr 250 EC-B Towercrane 1:18

    Hi, At first sorry for the late answer. I didn't check this topic for too long. I don't have a lxf of this mechanism yet. But here you can see a video of how it works at a real crane: I just rebuilt this mechanism with Lego. I hope the video helps you. Otherwise let me know.
  4. [MOC] Liebherr 250 EC-B Towercrane 1:18

    Hi, here are some pictures of the erection of the Liebherr 250 EC-B with 147 cm tower and 200 cm jib (in reality this are 26 m tower and 35 m jib, so it's a quite small configuration. The maximum tower heigth and jib length are 70 m). Tower and crane head were already installed: Then the counter jib was mounted: Because of the weight of the counter jib, it tilted quite a little: Then the jib and 2 counterweight blocks were attached: After reeving the hook, the crane is ready for any lifting operation. I hope you like this short report.
  5. Doppelmayr 3s Gondola Ropeway

    Hi everybody after 1 1/2 year of digital building the new version of the mountain station building (3s ropeway Kitzbühel, Austia) is now finished. The building is now modular, more detailed and should be buildable in real, because the old version was not. The building itself consists of nearly 15.000 bricks (the old version had 7.000 bricks) and it is 150 cm long. The whole mountain station including the mast and the ropeway system has a length of 250 cm and will consist of 30.000 - 35.000 bricks. I am looking forward to collect all the needed parts which will take some months.
  6. [MOC] Liebherr 250 EC-B Towercrane 1:18

    Thanks! I spent the last days optimizing the jib by reducing some more weight and making it more straight. I will let you know when there are some more news about this model, but it's mostly finished.
  7. [MOC] Liebherr 250 EC-B Towercrane 1:18

    Thanks! @suffocation the string is 0.15 mm fishing line. I don't have a link because I didn't buy it online. @Aleh The crane is a LTM 11200 in 1:50 scale produced by NZG: http://www.nzg.de/liebherr-ltm11200-9-5396.html
  8. [MOC] Liebherr 250 EC-B Towercrane 1:18

    I spent the last two months in creating a climbing unit for this crane. Real tower cranes use climbing units to climb up along growing buildings during construction. The climbing unit lifts the complete upper part of the crane, including the crane head and counter jib. A hydraulic cylinder mounted at the climbing cage braces itself on a “K” shaped strut of the tower and presses the upper part of the crane upwards. This happens 5 times until there is enough space beneath the slewing ring to insert the next tower section. Here is an animation that shows the system developed by Liebherr: The climbing unit was the most difficult feature of this model. At first, with the crane in its smallest configuration with 150 cm jib, it has to lift a weight of 4.2 kilograms. The finished climbing unit has a weight of 1.8 Kilograms, so the total load that has to be lifted (including one tower section in front of the climbing unit) is around 6.5 kilograms. This load is lifted by two linear actuators, extended by strings with a tear strength of 35 kilograms. Any other string I tested has torn. The two cylinders are powered by one XL-Motor using a worm gear with 1:24 reduction. But anyway the motor has to struggle with the weight. Fortunately I found out the right dimensions of the climbing frame so that it guides the tower very well without too much friction or backlash, which is very important for the climbing process. This is because the climbing unit has to absorb all kinds of imbalance of the upper crane, which could not be adjusted by the counterweight or the position of the trolley and hook. So the climbing cage has to be very stable, too. Especially when the climbing process itself is done and the next tower section can be inserted. At this time, the climbing cage touches the tower at a length of only 15 cm. All upcoming forces have to be absorbed by this small part of the cage. But this is enough of writing – after all there was the final load capacity test with a load of 4.8 kilograms (6.7 kilograms including the climbing unit). And what shall I say? It worked! Here is a picture of the climbing cage lifting this weight: After adding some details such as walkways and a small trolley powered by 2 micro motors for inserting the tower sections, the climbing unit was finished: The lifting unit: Here is a video of the climbing process: And a video of the crane climbing back down. In real life this happens when the construction of skyscrapers is completed and the crane can be disassembled: At the moment I am improving the model and I am reducing some weight in the upper structure. The jib lost 200 grams at a length of 200 cm: All in all this is a very cool project for me and I like the result. I hope you like it, too - feel free to comment.
  9. Hello everyone, My current project is the construction of a Liebherr 250 EC-B towercrane in 1:18 scale. The model is fully functional. The hoist winch is powered by one XL-Motor, the trolley winch uses one M-Motor and the slewing ring is powered by two L-Motors. All motors are controlled by an S-Brick. I have started building this model 4 months ago. Here the crane is assembled with 110 cm tower and 180 cm jib: The maximum height under hook is about 2 meters; the maximum jib length is 230 cm. The total length of the model with 230 cm jib is 330 cm. Here the crane is assembled with 150 cm tower and 230 cm jib: The crane can be disassembled into the same number of small parts as the real crane. These parts have roughly the scale measurements. Thanks to efferman´s turntable support ring the slewing ring is quite stable and rotates well (in the first video above the support ring was not attached yet, that is why the crane swings so much when it lifts or drops the load). The maximum capacity of the crane is approximately 400 grams in 2 fall-operation. But there is a second trolley and hook which allow an automatic change between 2 und 4 fall operation. The mechanism is the same as used for the real Liebherr fast erecting cranes und smaller EC-Bs.
  10. Doppelmayr 3s Gondola Ropeway

    Hi, a new feature is finished: The lights at the turnstiles. They consist of 0,6 mm LEDs.
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  12. Doppelmayr 3s Gondola Ropeway

    Thanks. @Blakbird I disassembled the model into modules and small parts. Fortunately everything fit into my VW Polo :D The setup took ...maybe 4 hours. But adjusting everything and making the system work is another task and takes much longer. I only managed to get the one gondola mode to work at the exhibition. The fullauto mode did not work. But this is my personal aim for ABSolut Steinchen exhibition next year :) The carrying ropes are made of cotton which is not the best choice at all. Maybe I will change them later. The pulling rope is a 2 mm Polypropylen rope which is quite perfect and works very well. The carrying ropes are kept on tension by the baseplates which define the distance between the stations. The pulling rope is tensioned by a weight, like in some real 3s ropeways. @Victor Imaginator there are levers at the gondola trolleys and rails in the stations. These open the clamps and release the pulling rope. You can see this in some of my videos on youtube. I hope I was able to answer all of your questions. Otherwise: just ask :)
  13. Doppelmayr 3s Gondola Ropeway

    Hi, my last post was a long time ago, because i totally forgot to show you pictures and the video of the exhibition in june. Efferman helped me during the disassembly: The last four months i concentrated on other projects. But now I will continue with the 3s. Last week i did some technical and optical changes and improvements. So I will try to make the ropeway more reliable during the next few weeks. But first some pictures: The gondolas are finished now, the problem was to get all the #3 connectors in red: The walkways along the mast got a mesh floor. And in the valley station the middle pulley was modified and strengthened. The pulleys in front of the station were mdified in order to reduce the clearance to the sides. Because of this the pulling rope often jumped off the pulleys and the gondolas got stuck there. This is a mayor problem and i hope that this modification works well. The next test will show... And another detail, the safety nets in front of the station were added: That´s it for the moment. During the next weeks/ months I will continue testing and optimizing the system and also redesign the building of the mountain station in LDD in order to make it modular, buildable and more detailed. I suppose the partcount for the building will increase from 7000 to approximately 14000 bricks. But time will show...
  14. Doppelmayr 3s Gondola Ropeway

    Thanks! And after changing the batteries the ropeway seems to work well. The last two tests were good, I hope this continues.
  15. Doppelmayr 3s Gondola Ropeway

    A new video, I got the Zeta to run and it runs even smoother than the Lego gondolas: [media] [/media]But unfortunately the fully automatic operation with all gondolas does not work at the moment. Within every testdrive, there are new problems. The last 20 trys failed...but I will keep improving it untill it runs perfect again.