Leonard Goldstein

Hi, another Mini-MOC for you: here comes the Mini-Skidder This little thing is very powerful as it uses 2 L-Motors for drive and a third L-Motor for steering. Watch the video: On my brick safe page you can find the pics in higher resolution and of course an LDD-File: https://bricksafe.com/files/Leonard_Goldstein/woody_and_the_woodpicker/Woody-Woodpicker_V02.lxf Let me know what you think Regards Leonard Goldstein

Hi @superdog, you're right: there are 5 motors. But you can use one channel for both driving motors if you use a switch (8869) to reverse one of it ;-) You can see the switch on the first pic of this topic in the middle of the cabin. Regards Leonard Goldstein

Your solution looks very smart One little detail you should keep in mind: driving the housing of a differential with one bevel gear fixed runs the other bevel gear with double speed. To compensate this you should have a 1:2 gear ratio on the input side. With the old style diff this is easy: 12:24=1:2. I also tried to find a solution for the new style diff, but did not succeed. The diff hat 28 teeth and there is no 14-teeth cog wheel available ... With the 12:28 configuration of your solution the subtractor will not completely compensate the two input rotations (rotating the super structure with fixed steering wheel will result in a little rotation of the steering output). With your earlier concept you will not have this problem of course. Using the two bevel gears as input and the housing as output might be the easier way. Now I can't wait to see the complete MOC Regards Leonard Goldstein

Hi @ancientpixel, maybe this can solve your problem: The green differential is just used to bring two functions through the turntable: 1. Steering (red) 2. Rotation of the superstructure (green) Both functions are added using another differential (blue). I am not sure if this really works (I am out of LEGO now ). Maybe you have to adjust the gear ratio. I used a similar solution as a subtracter for a tracked vehicle. Regards Leonard Goldstein

Update 15.12.2018: Everything is sold now and will go to the post office on Monday Hi everybody, the next dark ages are coming up. No need to be sad - I had a lot of fun during the last two years and a lot of great response here on eurobricks. The next months my other hobby will consume a lot of time: building a mountain bike (again). Obviously it will not be made of LEGO ... So all the bricks have to go. Here is a list of all my sets and other special parts (will be updated from time to time): 9395 Pick-Up Tow Truck..................(Coming soon) 9398 4x4 Crawler.............................(Coming soon) 42030 Volvo L350F............................https://www.ebay.de/itm/254019299732 42038 Arctic Truck............................(Ready to ship) 42042 Crawler Crane........................(Ready to ship) 42042 Crawler Crane........................(Coming soon) 42043 Mercedes Benz Arocs............(Coming soon) 42053 Volvo EW160E........................(Coming soon) 42054 Claas Xerion 5000 Trac VC.....(Coming soon) 42054 Claas Xerion 5000 Trac VC.....(Coming soon) 42055 Bucket Wheel Excavator.........(Coming soon) 42056 Porsche 911 GT3....................https://www.ebay.de/itm/254019289676 42062 Container Transport................(Coming soon) 42063 BMW R 1200...........................(Coming soon) 42065 Tracked Racer..........................(Coming soon) 42068 Airport Rescue Vehicle.............https://www.ebay.de/itm/254016192841 42069 Extreme Adventure..................(Coming soon) 42078 Mack Anthem..........................(Coming soon) ???? S-Brick.....................................(Ready to ship) ???? BuWizz.....................................(Ready to ship) 8878 Li-Ion-Akku...............................(Ready to ship) 8878 Li-Ion-Akku...............................(Ready to ship) All of the sets come with original boxing and instructions. Most of them have unused stickers. If you are interested in one or more sets, please let me know. You can send me a message with a suggested price. Now have fun out there in eurobricks land - maybe I come back some day Regards Leonard Goldstein

Hello eurobricks, today the last parcel was dropped - I am officially LEGO-free. Thanks again for all the feedback and a good time in eurobricks-land. From time to time I will have a look at the Technic-topics. I wish you a merry Christmas and a lot of inspiration for new MOCs Bye bye! Leonard Goldstein

Hi @MattL600, sorry, everything is sold and will get to the post office on Monday ... Regards Leonard

Hi everybody, my last few mocs were quite small - but not this one ... It is a Luffing Crane with a container claw - a perfect fit to 42078 Powerfunctions: 1. Moving forward/backward on the rails 2. Rotating the superstructure 3. Moving the boom up/down (level of the payload does not change) 4. Moving the claw up/down 5. Rotating the claw 6. Open/close the claw All functions are powered by one XL-motor. Function and direction is preselected by six clutches and there is one main clutch that activates the selected function. The main clutch works much smoother (it is a friction clutch) than the Lego dog clutch 18947 and allows precise steering. This is the key function of the model: the container claw. Three ropes, three functions: up/down, rotating, open/close The rigging is quite challenging Here is the engine house with 6 sticks to operate the clutches. The red read lever on the right activates the friction clutch. The shovels work as counter weights (with some old batteries inside). The trailer can carry two 42078 containers and has suspension with torsion bars. The container in the background looks a little bit funny as it is made of tracks ... And now guess what this is: ... these are the leftovers from 42055. Yes, yes, yes: this is a C-model It is using about 3000 bricks. Can you imagine to run out of black connector pins with a 42055 on the table? If you are wondering how these claw functions work, have a look at this topic: Many thanks to @kolbjha; I adapted your idea using a closed loop to open/close the claw. My crane uses the closed loop to rotate the claw and an additional rope is used for open/close. Well, that's it for today. I know you want to see a video ... please be patient. I will be away from my Lego for a while and of course I want to pick up the 42078 before I start the shooting. At least you can see the pics in higher resolution on my Bricksafe page: https://bricksafe.com/pages/Leonard_Goldstein/luffing_crane Bye Leonard_Goldstein

Hi @Skeltertje, wow, that looks great. It seems you spent a lot of time to improve the crane I really would like to test it myself - but on Monday I am "free of LEGO": Have fun with the crane (I did !!). Leonard Goldstein

Hi @evenfall, great, we have a deal You can contact me directly via email: --- Good chance to get it before Christmas Regards Leonard Goldstein

Hello everybody, PM seems not to work for some reason, sorry! (Maybe because you have not enough posts?) Some information about shipping costs: The whole collection as described above will fit into 3 parcels with a limit of 20kg each. Within Europe it will cost 32,- * 3 = 96,- Euro. Tracking and insurance is included. As an example to Sweden it will take about 4 days (hurry to get it before Christmas ). @LeechLord sorry, @evenfall was first . Anyway: The sale of the complete collection is priority 1. As I messaged to @aleh: I started to check some of the sets but it is extremely time consuming to disassemble all the MOCs and rearrange the parts to fit into the single sets. That is why I offer the complete collection for that stupid price Regards Leonard Goldstein

Hi aminnich, thanks - I know shipping to the states is a little bit difficult To all: I updated my offer from yesterday. 1000,- Euro - it's a steal at that price. Only the power functions would cost more then 500,- Euro on eBay Again: Deadline is 15th of December. Snag it! Regards Leonard Goldstein

42078, sBrick and BuWizz are reserved for @Aleh

Update 12.12.2018 Ok, eurobricks - here is the deal: 1000 € plus shipping costs for the complete collection. Deadline is the 15th of December. By the way: location is 09221 Neukirchen in Germany. Sale as one big package (no picking of single sets) unsorted parts and MOCs, no disassembling and no check lists for the single sets instructions included, but no original boxing about 2000 additional parts that I bought for several MOCs 4 metal storage boxes The following sets and special parts are included: 9395 Pick-Up Tow Truck 9398 4x4 Crawler 42038 Arctic Truck 42042 Crawler Crane (2 x) 42043 Mercedes Benz Arocs 42053 Volvo EW160E 42054 Claas Xerion 5000 Trac VC (2 x) 42055 Bucket Wheel Excavator 42062 Container Transport 42063 BMW R 1200 42065 Tracked Racer 42069 Extreme Adventure 8878 Li-Ion-Akku (2 x, with charger) A lot of Power Functions (see last picture and description) Here some pics (higher resolution is available here: https://bricksafe.com/pages/Leonard_Goldstein/selling#): Power Functions: 9398 full equipped: 2 L-Motors, V2-Receiver, Servo, Battery-Box (not on the picture) 42042 full equipped: 1 L-Motor, 1 Battery-Box (not on the picture) 42055 full equipped: 1 XL-Motor, 1 Battery-Box 11 x M-Motor 5 x L-Motor 1 x XL-Motor 1 x Servo 1 IR-Control + Receiver 1 Switch 8293 4 x cable 8886 2 x akku 8878 charger for akku 2 x LED lights 8870 Battery-Boxes (3 x 8881, 1 x 88000) without batteries Now make yourself a Christmas present Regards Leonard Goldstein

Hi @Aleh, thanks for your feedback - I will give you some more precise information with the pics next week

Hi @brickbybrick and @Rudivdk, thanks for your comments Maybe I will come back - but I don't know if it will be in 2 years or 20 ... I updated the list (see my entry post) and some more sets are listet on eBay. And here is a special offer to you members of eurobricks: All sets of the list that are commented as "coming soon" I would sell for half of the official price with the following boundary conditions: Sale as one big package (no picking of single sets) unsorted parts and MOCs, no disassembling and no check lists for the single sets instructions included, but no original boxing about 2000 additional parts that I bought for several MOCs 4 metal storage boxes I will add some pics next week. Regards Leonard Goldstein

Hi @pleegwat, I integrated some of your suggestions into to LDD: https://bricksafe.com/files/Leonard_Goldstein/luffing_crane/Luffing-Crane_42055-C-Model_by_Leonard_Goldstein.lxf The gearing for the rotation of the super structure is changed. As there is a change of direction I also moved the bevel gear at the front from top to bottom to compensate this. The pulleys between the legs are no longer needed and I changed the structure like this: Concerning the other changes I am not sure if they can be done within the C model limitation - so lets say they are optional Regards Leonard Goldstein

Hi @pleegwat, many thanks for your input! I know there is room for improvement in the gearbox. The price you have to pay for the limitations of a C model ... Anyway I try to give some hints to make it work: To make the boom elevation work better I strongly recommend to use some counter weight. As you can see in the picture below I uses six old batteries (3 in each pair of shovels). When explaining the rigging in the earlier post I forgot the rigging for the propulsion - sorry. Here it is: First remove the winch for the propulsion. Now take a rope (about 3 meters long) and knot the center of it to the middle pulley. Take one of the two ropes and wind 0,5m of it between the 2nd and the 3rd pulley (the 3rd is hidden in the picture below to show the rope!). Now you can mount the winch again and roll the two ropes down to the wheel/rails. The trick is you have two winches in one. With rotating the axle one of it winds, the other unwinds at the same time. Do the same for the other side of the bridge. At the end of the rails the ropes have to be fixed and you can adjust tension if needed. I really like your idea to eliminate the pulleys in the middle between the legs. To avoid any friction I would recommend to roll the ropes like this: The ropes can be rolled directly from the winch to the wheels. I think this is the most effective way and much smoother than my native solution. Finally the knot of the loop: I know this is a problem especially at the driving pulley with 2,5 winds. There is a solution to make this work better - but it breaks with the C model conventions. I used this for the 42042 (which I modified with a similar loop to open/close the claw). Use a rubber tire instead of the pulley. The much better friction coefficient makes it possible to reduce the 2,5 windings to 0,5 windings. Of course you will need some guides to prevent the rope from falling of the tire. Regards Leonard Goldstein

So many people working on my crane - I hope you all enjoy it Of course you are right. Could you send a pic of your solution? I would publish an updated version of the LDD if this is ok for you. Correct - all the pulleys with cross holes need to be mounted on separate axles. If not they would produce too much friction and the rotation of the claw will not work properly. It is possible to build this within the C model limitation (I just had the 42055 on the desk while developing the crane). Maybe you could publish the instruction of the crane without container and trailer? It must have been a lot of work (thanks again!) and I am sure it would be a great help for anyone who will build this crane. Maybe you can include my instructions of the rigging (or link to it). By the way: it could be very interesting thing to skip the C model limitation and make this crane RC. The steering section and the power section of the engine house could be skipped and 6 motors could be mounted directly to the working section. I never tested this and maybe some (or all) functions need a gear reduction. Bye Leonard Goldstein

Hi Garin, great to hear that you also build the luffing crane I know the rigging is very tricky and it may take a lot of time to make it work. Unfortunately I disassembled my crane months ago and I am away from my Lego anyway. But I will try to give you some hints. First disassemble the engine house to get access to the working section (see pictures above). Now remove the green part: For the next step you should fix the set of pulleys with an axle and some bushes (RED). Now you can mount the rope for the winch. Make sure the rope is long enough (the set of pulleys should almost touch the other pulleys on the top in the upper position) Now mount the loop. Use a long rope (I guess 4m; you can cut the left overs later). Roll the center of the rope 2,5 times around the pulley to produce enough friction. Fix the rope by pressing the 99773 triangle (orange arrow) - you will have to free the rope by moving the triangle later. Now assemble the engine house. The following picture shows how to mount one of the ropes of the loop. The trick is to roll from the bottom to a fixed pulley on the top, back to the moving pulley and again to the top. Do the same for the other rope of the loop. Now you have to close the loop including the claw. The following picture shows how to mount the rope around the pulleys of the claw. Before you knot the two ropes to a loop make sure it has the right length. With the fixed set of pulleys (red axle) the claw should touch the ground. Now cut off the left overs of the rope. Warning! The node of the loop must not run around the pulley in the engine house. As it is rolled 2,5 times around the pulley it would get tangled up. Finally lets mount the rope for the open/close mechanism of the claw. Fix a rope to the pink bush and roll it around the fixed/moving pulley in the same way like to loop (but use the middle pulleys of course). This rope runs through the middle of the claw and is fixed to the 63869 cross block. There is a little counter weight using track elements inside the claw to keep this rope tight. Test the function of the claw by moving the pink part. Adjust the length (and the position of the counter weight) if necessary. Now you can remove the axle that is fixing the set of pulleys and don't forget to move the triangle inside the engine house to free the loop. I hope this will help you to make this crane work. Good luck Regards Leonard

Hi, after finishing my luffing crane I worked on a very compact 6WD truck with skid steering. The digital model was almost finished about two weeks ago. I prepared to order the needed parts - but then I noticed the "BuWizz fast car competition". And I decided to upset the applecart. The original concept did not have any suspension and would not fit the conditions of the contest. So I widened the chassis and integrated independent suspension to all 6 wheels. There are two separate drivetrains for left and right side, each using an L-motor. But the clue is: they are connected by a subtractor powered by an M-motor. You might know this strategy from my previous MOC "Woody and the Woodpicker" https://www.eurobricks.com/forum/index.php?/forums/topic/156214-moc-mini-skidder-woody-and-the-woodpicker/&tab=comments#comment-2880712 But there are little differences to "Woody". The drivetrains are geared up to make the vehicle much faster (as it is a fast car contest ...). On the other hand the subtractor is geared down to make steering smooth at high speed. Enough words, here it is: About 1 week to the deadline ... I hope the weather will be fine next week to make some outdoor videos Regards Leonard Goldstein

Hi @Didumos69, many thanks for your offer In the meantime I hat contact to Tihi from the BuWizz-Team and I think the problem is solved. Thanks to Tihi! Now best wishes to all participants of the contest Leonard Goldstein

Hi everybody, deadline today - it is time to come to an end. My model was finished almost 4 weeks ago and in the meantime I made only very little changes at the roof to make access to the BuWizz easier. Although the last weeks the weather was fine I managed to finish the video only yesterday. The call of the mountain bike was louder than the call of the Lego Watch this: (edit: link seemed to be brocken - fixed) At the moment I have trouble entering the contest as BuWizz does not accept video links to Dailymotion.com. Well Dailymotion has a great advantage: it is a european company with proper data privacy. I am not youtubed or facebooked or anything like that ... If BuWizz is reading this: can you help? Regards Leonard Goldstein

Thanks to all! Here are some more pics for you: And finally the drivetrain with the subtractor: Regards Leonard Goldstein

Hi @johanmyst, many thanks for your work! That sounds like you're almost done The last changes should be very easy to implement. You will have to remove some connector pins (as they are replaced by another type) and the color coded parts should fit. Sorry for one more tolerance problem: LDD did not accept a 6558 pin and I had to replace it by a 11214 ... Regards Leonard Goldstein