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Found 11 results

  1. Hi there. For several day´s I was working on Nico71´s crawler crane which he made several years ago. Nico allowed me to show you that. I´ve made it in LDD only from his pictures. He never made instructions for it, only took several pictures of disassembled crane body. So I started step by step. And I´m proud to show you result. There is 4 motors in superstructure. XL for hook winch, M motor for rotating superstructure, another XL motor for main boom and M motor for luffing jib. Nico´s original crawler wasn´t motorized. So I´ve decided to add aditional L motors and AAA BBox with IR receiver. There was enough space for it. Last picture - entire crane disassembled to blocks. https://www.ulozto.cz/!hTHRd0qovvKh/crawler-crane-complete-lxf Hope you like it.
  2. Improved 42042 Crawler Crane. Banana Man for scale. It's hard for me to overstate how much I love the Technic Crawler Crane 42042. I've been constantly tinkering with it and making improvements since I got it about 6 months ago. My method is basically to lift heavier and heavier stuff until it falls over or something breaks. Then I rebuild. This is how it got to where you see it today. I don't really care about the tracks or the slewing. I want to lift heavier stuff, higher! So far my mod/improvement list reads like this: Upgraded the block & tackle harness for better mechanical advantage Added a quick-adjust system for efficient rigging changes to the harness, main hoist, and hook Beefed up gantry or A-frame: wider, taller, and much stronger Improved existing back hitch and added a second back hitch Counterweight box Strong, longer boom Paid almost (!)$20 for stupid Technic metal hook Integrated claw storage on gantry XL Motor upgrade Boom foot return damper thing Replaced LEGO string with synthetic cable (from Chin-a) Here it is in action. Read on for a more thorough description and photos of each mod/improvement. Click through on the photos to view them at larger sizes. Block & Tackle The first thing I did was add blocks to the block & tackle system allowing me to really turn up the mechanical advantage the motor has over the load when raising and lowering the boom. This of course comes at the cost of speed, but I'm OK with that. The nice thing about this is I don't have to actually use all the blocks. Quick Adjust Rigging on Harness and Main Hoist You can see my bright red and yellow-handled quick adjust axles with the red and yellow grips on the side of the harness assembly. This makes it easy to slip the rigging in and out of the blocks to fine tune my power/speed balance for the specific load. I also have these at the end of the boom and on the pulley so I can adjust the speed/power tradeoff on the hoist line. I added this quick disconnect system after I'd re-strung the rigging for the hundredth time. I can re-thread the rigging on both the harness and the main hoist line to go from "high gear" with max lift speed to "low gear" for max power in just a minute or two. (I had originally made these with axles that have stoppers on the end, but ended up using regular axles, because I have a ton of them.) A couple of timelapse (YouTube) videos of the quick change. Stronger & Wider Gantry The gantry in the stock model is really weak. It is wholly comprised of 4 Technic lift arms held in place with 6 friction pins. As I added heavier loads this system was quickly outgrown. I was bending lift arms and even popping the entire assembly off the superstructure. So I rebuilt. The new gantry is wider, allowing for more blocks in the harness. It is many times over more rigid and is taller, allowing the harness mount to be further back over the body, which in turn allows the main boom to be drawn up higher to a much steeper final angle. This piece took a long time and has been through the most revisions over the months. I did a lot of research by looking at other LEGO models, other and peoples crane MOCs. Both arms of this gantry are heavily inspired by the gantry on LEGO Crawler Crane 8288 (http://brickset.com/sets/8288-1), which I would love to own a copy of someday (not today). Improved Back Hitch The back hitch (the two black lift arms supporting the gantry) also quickly became insufficient. The anchor it was tied into was bending and getting stress cracks, so I created a stronger attachment system for it elsewhere. I also added a second back hitch that ties directly into the improved counterweight... Counterweight Box One of the challenges with cranes is counterweight. As the amount of load it can lift and move improves, their is a corresponding increase in risk of tipping. The original model cleverly uses the battery box mounted all the way at the back edge of the body. It's literally the furthest element from the tip of the boom. I added a weight box behind it that is open and easily filled with ballast of my choosing. C Batteries work extremely well because of their density and modularity. It has an open design so it's easy to adjust the weight on the fly as needed depending on the load and the angle of the boom. After building it, I added a the second back hitch directly attached to the gantry to remove stress from the body connection of the weight box and from the first front back hitch (heh). When the gantry starts carrying a lot of load, I don't know that the front hitch bears any at all. Stronger, Longer, Better Boom Maybe the most noticeable feature is the length of the new boom. The original is 30 studs long, not counting the butt and tip, with an optional section to extend it to 45 studs. This booms main section is 75 studs long. At this length, it had some really concerning droop/bending at full extension. However, I was also able to easily reconfigure the inner supporting structure to be much stronger since I didn't care about the ability to easily add and remove sections. I also added the outer white panels to help with rigidity as they span the weak links between the blue 15L lift arms that are the main defining component of the boom. The boom tip received an upgrade in the form of a smoother operating block and tackle system (with quick disconnect axle just like the harness) controlling the main hoist. I also added an aviation warning light, obviously the most complex and impressive mod thus far :) Main Hook/Claw Storage I purchased a Technic Large Metal Hook (http://www.bricklink.com/v2/catalog/catalogitem.page?P=70644#T=P) for like $15. It's easily the most I've ever paid for a single LEGO piece. Considering the time I've spent on this model, though, I thought it was worth it. It's mounted to the main hoist with the smallest of my quick adjust rigging axles. I can attach the hook directly to something of course, or I can use it to hang the functional claw the system came with. When the claw is not in use, I have a storage peg for it that can be placed on either side of the gantry. I built this after I got tired of it sitting on the bench next to the crane most of the time. Much like the quick adjust rigging system, it's a simple mod that has a high convenience impact when moving this thing around for play, improvements, and storage. More Power (XL Motor upgrade) After removing the clutch gears and incrementally strengthening everything else to lift progressively heavier and heavier loads through probably hundreds of lifts at this point, the 9V Power Functions L Motor (99499) that came with the system finally died (predictably). To LEGO's credit, they're already shipping me another. They didn't even ask if it had been systematically subjected to increasing levels of abuse since purchase. Rather than wait for the replacement to arrive I hooked up an XL I had laying around. It's slower, but has more torque. As you can see it is mounted almost all the way at the front of the body, which is not ideal considering the weight. I may end up routing it further back if I can figure out a way to that looks this good. I did have to git rid of the ladder that was here on the original model, but this is Technic, so whatever. It's not like I'm bouncing minifigs around and doing voices when I play with the thing. Boom Return Damper/Helper If you increase the mechanical advantage of the harness too much, the boom has trouble releasing from very high angles. There just isn't enough weight to pull the cable off the spool on the base. I added this spring mechanism to the butt of the boom to help push it out when there is very little lateral load. I may be swapping these gray Technic springs out soon for the stronger yellow ones as it could be more effective. They will also look better matching the contrasting yellow parts of this assembly against the blue. Rigging Cable Through many rounds of adjusting and rebuilding I replaced the rigging cable several times. As I added to the superstructure more cable length was needed. Going down certain oaths and backtracking also had me replacing the cable with different lengths over and over. LEGO string is expensive, so I ended up buying a small spool of this stuff off Amazon: https://www.amazon.com/gp/product/B00LDIKURQ/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 after seeing it recommended elsewhere on these boards. It works well. It's thicker than LEGO string, so be aware, but it's also stronger and it has a bit of a metallic shine, so it looks more like the steel cable you'd see on the real life inspiration for this model. Conclusion That's about it. The major takeaway is that this thing can now lift 750 grams up off the floor below my bench and place it on the bench right next to it (from up to 80 cm away). Good stuff. I also think I retained most of the good looks of the original set. I'm not done tweaking yet, but I wanted to do this write up and show it off a bit before I break it again, because my next mod is likely going to happen in the gear box, if at all.
  3. I have been shamelessly plugging the Lego Technic 42042 Crawler Crane over in the "What should I buy" thread here at Eurobricks but I just came across a new reason to buy it that I thought was relevant to a more general audience. A company in Europe called PV Productions has created a C-Model that is a GBC contraption. (No relation, ownership nor knowledge of who they are.) calls it a D Model because he has two GBC C models created from the set, but only the D Model is available for purchase now... and purchase it, I did! My seven year old son is into small Lego Techic models as he doesn't have enough patience to build the 1,000+ piece models, but after showing him the video, he wants to build it with me this weekend. Only problem... I don't own any of the Lego soccer or basketballs that are used for GBC models and I have no desire to pay the crazy $2.50+ costs per ball!! I've attached a video below (I assume that's okay) to the Youtube video he created of the D model. I'll be picking up the C-Model as soon as it's available for purchase. He also has pending future GBC models for sales that are all C Models of 42043, 42054 and another that is a 2 set C Model but I cannot recall which... Watch the video and you want to buy the set and want to figure out how to buy some Lego balls or alternatives. If soeone has a good recommendation for an alternate source, I would love to know it. Update: just checked my Paypal receipt and the PV stands for Phillip Verbeek, I think.
  4. Hey All, Here is my new MOC based off of the Liebherr 1750 LR Crawler Crane. I won't rehash all the details, you can find all the details on my mocpages @ http://www.moc-pages.com/moc.php/425498. It is a little bit of a read but hopefully worth it. Really fun build..... here are pics and videos.
  5. Time to unveil my latest creation, the crawler crane. Years ago I saw a nat. geo. documentary on a station in the south pole. During the construction of it, there was a crawler crane with a three section boom. Fast forward to April 2015, I built a three section boom for a crawler crane but due to having too many projects, it was never finished. When I saw the crane competition I realized that this was the perfect opportunity to make a crawler crane. SPECS Propulsion: -2x L motors -1x aaa battery box -1x v2 receiver Boom: extension: -1 XL motor Raising/lowering: -1 L motor Hoist: -1x L motor Superstructure rotation: -1x M motor Pictures: (comming soon) Video: Filmed with a Samsung galaxy s3, Fujifilm XP Quadcopter for air shots: Hubsan X4 H107C
  6. Hello fellow Eurobrickers, I would like to present my possible TC8 entry and WIP of a Liebherr LR 1300. Link to reference image (Way too large for eurobricks); http://c-bceasncc.la....d6hxJTXEZS.jpg Functions so far; Motorized through a distribution gearbox, 5 winches Slewing Drive (hopefully through a subtractor) Manual, Cabin rotation from transport mode to operating mode. Pneumatic cabin elevation. On the to do list, Complete opposite side and counterweight area. Design main and rear booms, and luffing jib. Build base and crawlers, while hopefully maintaining the ability to separate crawlers from chassis. Build wheeled super-lift. Any advice is greatly appreciated. Thanks, ~John P.S. Please excuse any typos/incorrect words, I am completely exhausted from work today.
  7. Hello everybody, Im a new member on eurobricks and I want to share with you my new lego construction. Probably I finished building the world's tallest crawler crane model with LEGO. The model has already been described by me on my Polish website: naturalbornuser.pl. This is a representation of Liebherr LR 11000 and measures 700cm height: The model is my biggest and heaviest construction. Is higher than my previous model of the crane by 4 meters, was built entirely of original LEGO - except for the line and load within counterweights. Number of blocks estimate at 15,000, and the weight of the vehicle including counterweights was about 45kg (the weight of the model without counterweights this 22kg). The construction lasted 5 months. The model is a representation of the crane Liebherr LR 11000, but the proportions of some dimensions have not been preserved - especially I mean the widened portion rotational located directly on the turntable and this was associated with one of my assumptions about the construction of a specially extended arm and over the turntable. It is of course free standing construction. The model was not a collective work, but in order not to expose themselves to voices of opposition on this issue can not ignore people who helped me build: Invaluable help my brother, without which setting the vertical structure would not be possible: At the beginning of the few technical data model: height - 700cm tracked chassis length - 78s the length of the turret - 120s overall length of the vehicle (not including arms or counterweights) - 167s the width of a tracked undercarriage - 66s weight - 22kg (weight of counterweights - 45kg) Track drive - 2x XL motor with a reduction 1:40 the rotation of the tower - 2x XL engine driving a cart with counterweights (function absent when folding to a maximum of the rest of the functions of the crane (3 winder) - 6x motor XL two on rewinder (2 XLe to lift the whole arm, 2 XLe to straighten the second section of the arm, 1 XL - winder hook, 1 XL - extra winder for lifting the main arm) number of cells Track - 210 estimated target number of pieces - 15000 the estimated length of the rope - 100m Control electronics - 2x tower IR The only not lego elements are the line and load in counterweights. As soon as we found the right place to spread vertically crane sat down to prepare it for transportation in short it split up into fragments exceeding 120cm in length and repackage most of them in black foil, which stiffened the long parcels for transport to the hall offering 7.5 - 8 meters distance between the floor and ceiling. Each item has been checked against damage during transport, which could go unnoticed then lead to the weakening and destruction of the whole structure. Then he began to lasting a few hours of the submission process model with ten elements, which has been divided for transport. About 355cm: And 505cm: About 700cm: After turning the main winders driven by two motors XL by a significant ratio of the winding rope hoists running through heavy arm began to rise until it reached almost vertical. Then the second winder finished the whole process and final two-meter section of the arm was in final position: The structure is stable. At the time of publishing this article crane stands in the maximum configuration for five days to move the arms using machines is possible. When designing the construction arm of my goal was to minimize its weight which resulted in probably slightly on weakening capacity of the structure but with a substantial reduction in total weight allowed for a high altitude. The construction of most elements of the arm is as follows: Elements of a length of 105cm weigh about one kilogram each. On the other hand, the lowest situated part of the main arm weighs about 1.5 kg and is characterized by a more solid construction: Finally, a few images of a tracked chassis. And for more pictures and more information about this MOC you can visit my website.
  8. Hoi hoi One of my latest creations is a Sennabogen 5500 Starlift. It's almost completly rc controld, Only the driving of the crawler tracks are manual. I hade not inoff space in the underbody te make pf in it and make ik louw, The underbody is only 3 studs high. All the functions in the supere structure are rc. The model is made so that it can ereckt itself. And transported on trucks. I realy love the dragline but the real model can't be equipt whit a dragline bugget. The turntable for the crane is reinforst (later more about that) Think that some pic's will thel the rest of the story. (Don't no of i my post all the pic's in one post if not pleas say so thx ) Muddy Part 2 Muddy Part 3 If you like to see houw i made it you can take a look over here. http://www.mijnalbum.nl/Album=6MXLQY3Y Injoin it Muddy
  9. Ok folk, been working on this for a while now, please excuse the rubbish pics but im sure you get the ideaIve still to get a few power function parts for the base but the upper section is all working and had a lift of 2kg so far but with plans of trying for a bit moreOne thing im strugging with is, the two main winches in the body are run off the same motor and have to wind/unwind at the same speed but im strugging to get the string to wind nicely on the spool, anyone any ideas?Ok this is a 1:50th model of the real machine im working from
  10. Technic General Discussion Welcome to the Technic General Discussion topic. Here you can post small questions or comments about Lego Technic which don't need a topic of their own. This way we will keep the number of topics limited. Examples Has anyone built vehicle x? Where can I find this or that? I missed this set on eBay...darn!
  11. Rottermannen / tv2mustdie posted this of his fully-functional Lego Technic Crawler Crane which can lift 4 kg (8.8 lbs.) at 50 studs distance -- "4 kg (7 x 3.5" Hard disks) at 50 studs radius. Slewing and crawlers working. 5.2 kg ballast + 1.8 kg central ballast." It can lift 7 kg (15.4 lbs.) at a closer distance. His Flickr photoset has 13 pictures with descriptions of how his various load tests developed over time. He description of his MOC: "LEGO Technic Lattice Boom Crawler Crane Lattice boom crawler crane with 9 kg lift capacity made from LEGO Technic. max. lifting capacity 9 kg at 200 mm (25 studs) max. load moment 18 Nm Main boom 432 to 1152 mm (54 to 144 studs) Lattice jib 420 to 1120 mm (60 to 140 studs) Crane weight (base + superstructure) 2.7 kg Central ballast 1.8 kg Superstructure ballast 6.2 kg The superstructure is mounted to the base through a turntable powered by 1 small power functions electric motor enabling slewing under full load. The superstructure is equipped with 4 winches and 6.2 kg of counterweight. The base is equipped with 1.8 kg of ballast and crawlers powered by 2 small power functions electric motors enabling the crane to move with full load. The lattice boom consists of 2 to 5 sections (54 to 144 studs length) and is connected to an A-frame which is raised and lowered by 2 times 12 falls powered by 2 winches each with 1 large power functions electric motors. The hook is lifted with 2 times 12 falls powered by 2 winches each with large power functions electric motors. T he jib is raised and lowered by 1 winch with 1 small power functions electric motor (12 falls) and the jib hook is lifted with 8 falls powered by 1 winch with 1 small power functions electric motor. Non lego parts: 2 axial steel roller bearings are fitted to the turntable to allow slewing with max load moment. The crane will have similar load capacity without them but slewing will not be possible. 1 mm braided ropes are used on all winches."