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Sure, virtual reality is our friend, but meanwhile makes our heart sour not to having parts in wished colors...

Great idea (...sad background) and presentation! I am surprised how well the "wheels" keep up with hard surface drive. Thanks for spreading the word with due quantity of humor.

I have no exact idea, might might be that. VS, I think your backhoe would be based on a Claas Arion / Axion in real life, so in proportions something like that. Hard task for a C-model, I know...

Just to have it as plan-B for hardcore crawling, I prepared a "locked differential" version too.

Looks a bit oldschool - maybe the cabin, but overall very very impressive! I never tought that 42054 would have so many nice C-models, but seems You are master of this set.

They help to look awesome - that is the only purpose.

Yepp, that is the goal, I think You nailed the description. Take a rat rod, put an Ultra 4 chassis underneath, and rock it! I played around a bit with panels for the rear segment, now it feels more complete (damn, I lack 2 white panels from my order now).

Update: 477 pcs, rear axle is finished, roof is attached. The only thing is missing, the pneumatic hose (black) to form the A pillars- roof side tubes - roof back, I plan to use one piece of hose going through. As you might notice, the rear shocks don't fit properly in the model, I don't have the mood to adjust everything in correct angle for now, first I want to see the characteristic of the suspension. I would be surprised if it would match for the first try... Now, waiting for parts, and first build test can begin. I will maybe add a bit rollcage on the rear yet (no spare wheels planned, no need for extra dead weight), but not much, I kinda satisfied with the ugliness of it - even if some don't agree. Also I need to test the gearing, I would like to see it climb rather than speeding, and secretly hope for good trial performance... except the turning radius as mentinod before. Scale comparison, a bit longer wheelbase, same track width, a bit lower than the 42037.

Jaw dropping technical delicacy, as usual from You! Love the alternative usage of the wheel hub. (I made recently something similar, but it is still just in experimental phase.) Maybe the nose could be covered a bit better with small panels, or with white beams, but not obligatory.

Thanks for the remarks and ideas, I store them for later tests! For the A pillar I have some other ideas too, just like using black pneumatic hose, something like this (purple shows where it would be fitted in), simulated a bit with flex axle. This will be formed during IRL building, with LDD it is just impossible to bend the flexible parts correctly. Still, I am not fully sold on the very smooth lines here, the overall picture should be bit rugged, harsh, mean, dare to say: ugly. Like lovechild of an insect and a hammer. @kbalage Luckily it is not much different than my daily job, also my wallet and my back are happy about 3D design. @Didumos69 Thanks for the note, I am aware of that (spare parts stocked ), looks like this will be the compromise, I need to make here. The turning radius will be probably terrible... After watching some Axial Yeti videos, I lean also more for the solid axle - which is more less only placeholder yet in the model. p.s.: the Tigercat is doing well, just resting.

Hello All! It is winter time, so I am bit more busy on Legoing. After seeing, that @Didumos69 started his 4x4 buggy project, I looked into a bit deeper the Ultra 4 racing, and the rigs been driven in this extreme events. Finally the video, what I linked to his topic, triggered the work on another MOC: the Ultra 4 buggy. Here is another video to see the interesting bits of independent suspension system on this beast: Still, I might end up with IFS (independent front suspension) and solid axle with torque bar for the rear, but the body is heavily inspired by the Lasernut buggy. Parameters: 2x L motors 1x servo motor AAA battery box - in order to be replace ability with BuWizz in case IR control Let's look at into the progress a bit, maybe it is interesting to read. I started on 28. november with LDD model. To set the proportions, and the body ideas, I usually place the essential parts free in space first. Check the real inspiration thing and the very first sketch: After that I added the electronic parts, to check the necessary minimum space. (Unfortunately Stud.io has corrupt models, so some cover parts of the motors are just not present.) At this stage, I built the front axle, to see how can I integrate the steering. The answer is: massive fail. So back to drawing table, I deleted the 5x7 frame, and started to figure out, how to connect the needed fixation points for swingarms, servo. Due to this, the model gets more complex than I thought, but buildability is always first! I recommend to check meanwhile IRL building too, or at least stop by and thinking about how to add the related parts. I was hopeing for a simple MOC, but I ended up already a pretty complex assembly, so I made each step with double check. Later on, I will try to add groups in LDD to represent the buildability order too. So far the front module with steering and IFS is ready, the middle module is almost done, I am wondering about interchangable solid axle or independent solution for the rear - not sure yet. Also the color is to be decided yet, as the springs type as well (soft or hard). I think if soft ones will be OK, than I go for white body, as it presents the "rollcage" better. In case the yellow hard shock absorbers will be needed, of course the only choice is: full MEAN black body. This picture shows the advantage of the white body, and also a comparison for tyre types: 3740 on the left, 45982 on the right, both on 56908 wheels. So far 407 parts, and I guess it is about 70-75% ready. I need to figure out how to fix the roof, and create a solid, but easily disconnectable rear module. Necessary parts are ordered, so real build pics might come in couple weeks first. And how is the road presence? I guess it will be pretty much like a punch in the face. p.s.: Yet another WIP, I hope for long winter nights, to finish at least some of my unfinished projects...

Perfect, thanks Guys! Now I am more confident to order those tires.

Thanks for the prompt answer @I_Igor! Could You post a picture about, please? Interesting to hear, that color variants have some deviation, though.

Hello All, I would like to ask for some help. Can somebody check please, if the tyre 24x43 (3740) would fit - and how well on 43,2x26 (56908) wheels? I am wondering to use this combination for a crawler, and if these tires would be good at all, considering the grip, and the friction inbetween the mentioned combination. Thank You in advance!

Agree with @nicjasno and @Didumos69. Also using RC metal wheels with huge tires will increase the dead weight, and the moment of inertia, which will drain the performance of the (weak anyway) Lego motors. So actually it works opposite for models which for it was thought (I guess): trial remote controlled cars and trucks. For manual models, why not to use to pimp the look, but for the price... rather the one, what @rm8 described. Nice looking, dead born solution.

Congratulations Madoca, fantastic MOC in every aspects! I would like to go beyond the pure praising words: I seriously doubt, that in this scale anything more could be integrated, it seems You reached the borders of Technic building possibilities. (As we tought this before already, I can imagine, that Your picture about Lego Universe is expanding as well, just like the real one, so borders are only for us, in our mind. ) I do respect Your talent in the highest level, and I really-really hope that TLG will hear my words, and makes a gesture towards You. Many-many children and adult admire Your work, and I am pretty sure the distributed (worldwide!) marketing value is not negliegable at all!

I am away from home now, so I can not check, but could be a solution to block the 2L frictionless pin by putting a 3L lightsaber piece into - if it fits, or similar (screwdriver, minifig accessories). With 2L friction pin it will for sure work, and I don't think it would effect the working too much. Tomorrow evening earliest I can show You examples, if needed.

Second that, but luckily they can be swapped for sake of buildability. I am interested in rigidity of that solution, clever part usage though!

Not that one, but custom built solution could work, though I am afraid not for a buggy motor version... but for static models with fake engine could be perfect. LDD file is here. Edit: I don't know why I put the half bush on the wheel axle, totally unnecessary. Also with this spring setup the movement range is more limited, but I could imagine a suitable pushrod system.

Just popped in my mind another possible solution for reducing the wheelbase on the smaller version, the bottom fixation point is adjustable in 3 studs height (by swapping the parts). The red marked part can be this too: , fixed by extra half bushes. LDD file is here, might be usefull for someone.

Very nice video, glad to see the guests! @Madoca 1977 Can You please share / describe the modifications You have made (mentioned in the video), to improve chassis stability?

Very weird walkers, and I consider this as a good thing! Love them, and the mechanism behind!

That will be a pretty agile thingy, I can see this on pair with Madoca's Trophy Truck in performance! Can be a very cool Ultra4 Buggy (I know those have usually live axles on the rear - but let's stick to artistic freedom ), I would only swap the tires for Unimog ones, they just look better (more authentic) due to the profile. I can imagine pushrod system for the suspension, looks brutal so far, it is even fun to discover all the connections and part usage. You have definitely my attention! EDIT: Just found a perfect matching beast for the project, there are full independent solutions in this class too: https://www.youtube.com/watch?v=c2s9REdvNLY

Nice MOC - not overcomplicated, just as much is needed (could be a bit faster geared). Best: fun video, with good editing!

Touche!