John Deere Scout


Another addition to the vastly growing Thirdwigg Farm.

I built the Atmos Tractor a couple of years ago as a small little project. Soon I had created a number of attachments and trailers to work with the tractor, and soon I was more tractors and other machines were added. But the balance needed some additional tractors, so I decided to make a little partner.

The John Deere Scout specifically so I could use the new Tractor tires that came from Lego 42122 and Lego 42129. But I wanted to it to be a smaller tractor with many of the features needed for full Thirdwigg Farm integration. Thus, the tractor had to have the common front and rear attachment points, a rear PTO, and steering because I put that it everything. Soon it was clear that the size of the tractor was going to make a fake engine poorly done, so I left it out. But I wanted some other feature to make this tractor unique.

The front bucket uses a worm gear function to lift the front arms. It is driven by a mechanism that drives rear, and then up to the top of the cab. There is a little gear for the HOG function that is just behind the steering HOG. A small worm gear mechanism is used to tilt the bucket. The arm can be easily removed if the desire is for the tractor to mount something on the front attachment point. The rear PTO is connected directly to the rear differential, and the common three point hitch is installed as well. Finally a trailer hitch is attached.

I also made a couple of attachments specifically for this tractor including a snow plow and scrapper, and a little trailer. Both may be found for free at Rebrickable.

With each additional tractor I add, I think it will be the last, but I keep having more ideas, and each one has been fun to design. I was pleased with how this tractor turned out, and how well it functioned. The tires look great at this scale. Most importantly, it matched well with each of the other tractors. The instructions are freely available at Rebrickable along with all the other Thirdwigg Farm builds, so feel free to make one of your own.

Happy building.

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Synthe Combine


It was time to build a combine harvester for the Thirdwigg farm.

You may find instructions for this model at Rebrickable.com.

I was putting off building a combine for a while because they are pretty complicated. It took me a while before I felt like I understood enough about them to translate them to a LEGO MOC. After some time learning about them, I was ready to begin something. The scale was set based on the Atmos Tractor, so then it was a matter of deciding how many features I could add into the model. The models started with the thrashing mechnism, and then everthing fit in around it. I settled on a rotating thresher rather than a set of shuffling screens. In the center of the combine is a rotating auger that separates the grain from the staukes. As the auger spins it move the crop rearward separating the grain as it travels rearward. In the MOC, the auger is connected to the front wheels as the combine moves. Under the auger is a reciprocating screen that further separates the grain. Likewise this is also connected to the front wheels. At the rear of the auger are two spreaders that spread the chaft out the back of the combine.

Also connected to the front wheels is a takeoff that operates one of two cutting heads. The cutting head uses two augers on each side to move the corn to the center so it may be driven into the combine. A cutting edge is right behind the cones, and its movement is driven by a link below the combine, so it may cut back and forth. The full corn head is removable, and can be easily replace with a grain head. Each head is mounted on a moveable mounting plate, which can be moved up and down for harvesting and transportation.

In addition to the harvesting functions, the combine also has an opening right side so you may see the internal functions of the tractor. Here you may also see the mechanism that opens the top hopper. Additionally, the grain extractor on the left of the combine can be extended. Steering for the rear axle is operated by the air intake on the rear of the body.

This MOC took more time than usual for me, and there were a couple of times that I thought about scrapping the build, but I am happy I stuck with it. In addition to having another vehicle to populate the Thirdwigg Farm, the functions of the Combine were fun to implement in this build. Each worked well, and were fun to play with. The interchangeable head was an addition that changed the look of the combine depending on my mood, and each functioned well.

I guess it’s time to plan another tractor. Until then, happy building!

8854 Update


Winner, Winner, Chicken dinner is what we say in my house!

Free instructions are available at Rebrickable.com.

LEGO 8854 Update

I often participate in online LEGO contests, and most of them are on Eurobricks.com. In the summer of 2021, Eurobricks announced TC20, Technic Studless Recreation. I participate in many, but not all, of the contests that Eurobricks offers. The requirement was to pick an old studded set, and recreated it in studless Technic. I couldn’t sit this contest out, as it checked all the right boxes for me. Entries would be smaller to stay in scale, the builds would be feature packed, and it they would have a deep nostalgic connection. I was in.

Choosing a set to recreate took some time. I started with a list of 32 sets, and started to whittle it down from there. Quickly I removed some of the sets for various reasons: interest, size, not right now, too sacred (8880). I ended with a top three of 6357, 8855, and 8854. 6357 would be interesting to me, but after doing 8640 a couple months back it could wait. 8855 had some opportunity. It is a classic set, and instantly identifiable. I built a little mock-up, and let it sit for a couple of days. I didn’t come back to it.

I am not sure why I did not settle on 8854 right away. I love building Unimogs, and when I do updates I like to add some features. 8854 was missing suspension and an engine, so everything was right for me to recreate this iconic set. I had made my decision and I started posting my progress. First, I had to decide the scale. I made the decision to use the newish Batmobile tires in the build, which make the tires a little larger than the original 8854. I added a stud to the wheelbase to compensate, but otherwise the scale would remain the same.

Next, I had to figure out how to add all the features I would want, while keeping all the original features. HOG for the steering would remain on the top right side of the cab, naturally as a beacon. I then added a control gear for the outriggers on the top left side of the cab. The rotation of the crane would be on the right of the truck driven by a worm gear, and all other crane controls would be on the crane itself.

Fitting in the suspension and engine was a little tricky. Adding the engine was simple enough. There is a differential on the rear axle with portal axle. The driveshaft goes forward to drive a I4 mini engine. Suspension is a dual pendular axle setup: both axles pivot side to side. The front and rear axles are linked together so that when one axle pivots right, the other axle pivots left. It is a simple design that functions well.

LEGO 8854 Engine

Designing the crane was the easiest part. Panels form the base of the arm, and a simple extending boom as created using studded technic beams and some rack gears. A worm gear extends the boom.

The cab is where I had some trouble. 8854 has a funny shaped cab to my eyes. First, it is very narrow. Second, the hood slopes very steeply. Third, the windshield is not very steep, more car shaped than truck shaped. I rebuilt 8854 in Bricklink Studio to help me compare the two designs over each other. I found this to be a helpful step, and allowed for some good feedback from other Eurobrick members. I ended up making the hood a little more flat and slightly shorter. The roof was made a little longer, which made the windshield a little more steep. Then added the fenders that wrap around the wheels a little better, and headlights and a grill that referenced the original grill. I was pleased with the final design. Oh, and I added seats, opening doors, and a dashboard.

Being able to compare the two versions side by side helped me feel comfortable with how the build was going. Most of the time I use Studio when the build is complete, as do not like to tinker in Studio. However, being able to see changes in real time, was immensely helpful. I could ask was the new version staying true to the original? If not, what was the specific part that was making it feel/look off? Being able to overlay both versions on top of each other was helpful, and a step I will do again in the future.

Cab Comparison Overlay

It turns out the design was good enough for a first place! I was thrilled that through both a voting and jury stage, this update was picked over 46 other designs. In addition to that affirmation, I was pleased with how the MOC turned out as well. The functions all worked well, and the control of each was simple and effective. I only wish the suspension was little more stable, but this was only noticeable when the crane was fully extended. I’ll use the suspension again in other MOC soon. If you love 8854 as much as I do, I hope you will give this update a build as well.

Happy Building.

Compact Telehandler


Sometimes I plan out a build, and other times, a build just kind of happens. This was the latter.

You may find free instructions for this MOC at Rebrickable.com.

After building the Atmos Tractor, and then a gazillon implements, attachments, and trailers, I started branching out to other machines that could be used at the Thirdwigg Farm. The Compact Loader was a result of this. I was playing with the new LEGO 42122 tires, and quickly came up with a little four wheel steering idea. I added a fork boom, and decided to see where the project would go.

I am quite fond of LEGO 8283, and the rest of the design was influenced by this little set. I tried a couple of boom extension designs, but each looked a little too “overweight” for the little tractor. So I came back to the extension design that was used on 8283. A mini linear actuator is used to lift the boom. Both functions are controlled by two separate gears on the back of the telehandler.

The cab came together pretty quickly, though I had to make sure the new tires had a clear range of motion. I added some lights, and front fenders which brought a little visual weight to the front. I had a tricky time finding rear fenders that I liked, but I eventually found a solution I liked. In my move towards increasing the readability of my instructions, I have published a PDF with step-by-step instructions that list required parts for each step. I hope they are clear for you, and they bring value to your own build.

The Compact Telehandler worked just as I hoped. The steering is great; it’s fun to drive this little tractor around on a small desk. The boom lift works well, and has a great range of motion. The extension works smoothly, though since it is driven by a worm gear, if the extension is in the wrong position while trying to lift the boom, the boom will bind. The fork tilt mechanism is smooth, and is easily accessible in all boom positions. We will see what next build come from just playing with a couple of parts.

Happy building.

Compact Loader


It was time for me to learn how to do Bricklink Studio, and my Atmos Tractor needed a friend to load all of the trailers.

Free instructions can be found at Rebrickable.com.

This small loader came together rather quickly. I decided to use rear wheel steering rather than articulation as this would keep the mechanics of the bucket/fork simple. Additionally, I wanted to use the new tires from LEGO 42122, and they take up a little more room while turning. Finally, I wanted to allow the tractor to switch easily from forks and a bucket, so this simple feature was the second part to figure out.

The next part of the build required a little more trial and error. End Loaders are tricky in that they have a wide range of motion, and have to fit within a little given space due to the front wheels, cab, and ground. It become clear that at this scale, a mini linear actuator was not going to work. So I used a worm gear and 24z gear with a small linkage to the boom. This gave a wide range of motion, including a very high lift height. The motion was controlled by a 20z gear at the rear of the loader.

The bucket/fork tilt was a little more tricky. A 8z gear and worm gear control the movement. I add this mechanism in many of my builds because it works well for many needs; and it is small. In this build, I needed to redesign the frame for this mechanism as the standard build would not allow for the bucket and fork to fully tilt at ground level. But with a little modification, I was able to get it to work. At the high end, the bucket tilt can bind, which is not great. The tilt stays consistent as the boom lifts, which was a requirement for me as the fork was going to be a center part of the build. Control for the tilt is at the rear of the tractor. Pulling two axles allows for quick change between the bucket and the forks.

Finally, I built this MOC with the singular focus of developing my skills with Bricklink Studio; with the goal of improving the instructions that I make available. I have made photo sequencing instructions for years, but with the 800 pound gorilla that is Rebrickable.com, more and more people are contacting me directly saying some form of “I am confused when I try to build ______.” So, after trying a couple of 100-200 part builds, I launched into this Compact Loader, and built the file in Studio. Studio takes a little time to get used to, but it is slick. And the instructions that are generated are very slick.

But it does take time. Many of my instructions have been free, and I continue to value this for many reasons, but I’ll be reevaluating this the deeper I get into this transition. Either way, enjoy the many MOCs of mine that you can build for free.

I am pleased with how this MOC turned out, and what it taught me about building in Bricklink Studio has been valuable. The model fits my design language, and functions as I expect my models to function. And now, you can clearly figure out how to build it as well. I hope you will enjoy the build as well.

Happy building!

John Deere 5115


Sometimes you just do not want to shovel your own snow. Why not get a machine to do it for you?

The full gallery may be found on Flickr.com.

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I have enjoyed building a number of tractors over the years, and I think it is mostly because I enjoy building all the implements. This little Deere is no exception. When I was making instructions for the Claas Atos, I found some inspiration from this picture. I wondered, “could I turn this into another tractor?” Yes, yes I could. So I was off on another mid-power tractor.

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I decided on the John Deere 5115, which is a mid-power, open cab row tractor. I used the chassis of the Atos, so the tractor retained the drive, steering, front and rear PTO, and the front and rear three point hitch. I added a green fake engine, a new hood, and some new wheels and tires (Batmobile!). So it was a simple modification of a simple previous build.

I added a variable V-Plow on the front from M_Longer, and a simple spreader on the rear powered by the PTO.

The MOC worked just as well as the Atos, which it should. But the Deere looked a little better. The hood looked more complete, and the proportions looked a little better. Plus the color of the green and yellow always looks sharp.

Happy building.

Volvo Ibex


Another contest, another build. LEGO Ideas posted a contest to build your idea of the Volvo construction vehicle of the future using LEGO Technic bricks. This was my entry for the contest, which did not win, but was a design I was happy to complete.

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The design was inspired by the Volvo Sfinx and the Hyundai HFex Concept as I was interested in trying the various tracks, and a foldable boom. I started with the track sections, with four idetntical modules. Each are connected to the center turntable with a worm gear assembly for individual track movement. The system is enough to hold the full MOC, but not overly strong.

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Next came the superstructure. I created a conventional cab on the left, and added some fuel cells on the back. These cells can slide out the back of the superstructure to be easily replaced. Next came the boom. I wanted a three section boom that would fold, and extend in a variety of directions. Each of the three pivots is operated by a worm gear mechanism. The best manage the length of the boom, the main boom used a worm and 48z gear, the second used a worm and 24z gear, and the final boom used a worm and 8z gear. I added a ball join at the end of the boom to allow for multiple attachments.

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The entry did not win the contest, but I was happy with the result. It was creative, and functioned well. I like the way it looked, and was happy with the track setup.

Happy building.

Claas Atos


Not only are my builds becoming smaller, I am also enjoying builds that offer a little more modularity. Why build one thing, when the one thing can play a number of different tasks?

When I built the Snowblower a couple of years ago, I made a couple parts of the truck removable. So after the build was complete made a couple of other options: different cabs, other beds, a crane. This kind of building continued with the 9393 updated tractor. I was hooked. So, when it came time to make a tractor, I had this feature central to the build.

The Atos started a couple of years ago when I completed the 9393 update. I wanted a front PTO in a small tractor. Lime parts were becoming more prevalent (though we are still missing a red medium wheel), so I figured I could make something work. I started with the front axle, as it would need steering, a PTO shaft, and something to lift an implement. The PTO shaft runs directly forward from the rear differential under the steering rack. Another axle runs a stud and a half to the left, which drives a worm gear to elevate the front drawbar.

The engine is mounted on top of the steering unit, and is connected to the rear differential. Off the right side of the engine is a changeover that controls the raear PTO. This drive moves to the rear, and then powers another PTO for the rear. The changeover lever is in the cabin, to the right of the steering wheel. As in the front, a worm driven drawbar is on the rear to mount an implement. A simple hitch is there for a trailer.

I build a front Lemken furrow, a rear Poettinger power harrow, and a front and rear Claas disco mower. I look forward to making other implements as well. Each attach to the front and rear by removing a 5l and 8l axle with stop. It’s simple, and allows for endless modification.

I am happy with the way the tractor turned out. It was strong enough to handle the play of my young kids, and all the functions worked well. I would have like to have an on/off switch for the front PTO. Other than that it turned out well.

Until next time, happy building.

Coast Guard Helicopter


I enjoy helicopters very much, so as it has been some time since the MD600, it was about time to make another one.

The full gallery can be found on Flickr and Brickshelf.

After my last helicopter, I wanted to build one that was more basic. This one would simple, small, colorful, and would make use of the excellent blades from set 9396. I wanted to do something like the Sea King, but with a Fenestron tail. I used a HH-52 as a basis for the scale. I built a mock-up of the scale, and started making the gearbox for the helicopter. The main rotor could be operated from a gear on the left of the aircraft. Two changeovers located next to the landing gear pods could be engaged to drive the land gear (up or down, on left) and the winch (up or down, on right). The main rotor was connected to the Fenstron fan at the rear. Both the landing gear and the winch are driven by worm gears, so they would stay locked when the changeovers were in neutral.

The gearbox is mounted in the bottom of the helicopter directly under the rotor. The landing gear mechanism moves forward with the pilot and co-pilot seats directly on top (I love those new panels). The winch gear moves aft, and drives a simple string spool. The compact driveline keeps enough space for a full cabin. There is enough room to add a battery box, and a M motor to power the rotor.

The body work came together quickly with the exception of the rear doors. I wanted to add two sliding doors with windows, and based on the color scheme of the helicopter, they had a to be white. After six drafts, I finally came up with a solution that was doable. They are not perfect, but all the other designs had windows that were comically small, or too low in on the body. Unfortunate, the design calls for six white rare parts. The rest of the bodywork turned out well. The nose, while a little clunky, looked how I wanted. The top area looked good with the three engine exhausts, and the six bladed rotor, while overdone, fit perfectly. Oh, and with clever pin placement, you can fold the rotor back towards the tail. The tail looked sharp with the ducted fan. The vertical stabilizer looked empty, but that’s a problem for all LEGO Technic aircraft with the exception of 42040 (maybe).

 

The helicopter worked great, though a clutch for the gearbox would have been nice. I was pleased with the bodywork of the helicopter, and the colors worked well; maybe grey and orange would be great on a rebuild. I would have lived to have a cleaner design for the wheel pods, but it worked well enough. It was a good swooshable design, as I found playing with the helicopter extensively. Now I need to make a scale Coast Guard ship on which the helicopter can land. Maybe next year.

Happy Building

Mini Mack Cabover


Sometimes I need to build something small to refresh my mind. This was the result of stepping away from other projects for a while, and spending a couple of hours on something small.

The full gallery may be found on Flickr.com.

Recently I wondered if I could build something like LEGO set 8065; a small truck with one function. I liked the little roll off dumpster idea, and I see plenty of the Mack version around here. I had a couple of hours, so I thought, let’s see what I can build. The single function of the truck is the roll off feature. A worm gear moves the arm up and down, and the little hook catches a bar on the dumpster.

The rest of the truck is build on liftarms and connectors. The truck is 8 studs wide, and the space between the two rear axles is 4.5 studs. These two measurements made the chassis more challenging than it should have been. I built a simple cab, and added a little bumper, and the truck was done.

The truck works well. It only does one thing, so it should. It was fun to do a quick little build, and make something small and simple. Until something more substantial…

Happy Building!