N1K0L4 Posted November 19, 2025 Posted November 19, 2025 In the future I will post all my creations in this one topic to have it all in one place. Links to all the previous topics in chronological order: Quote
N1K0L4 Posted November 19, 2025 Author Posted November 19, 2025 (edited) After a year and a half I came back to my Green Formula MOC with new knowledge and ideas to improve it. The model was very good from the beginning, but it had a few problems. First is that you only could drive it on very flat road (no suspension) and not very fast because it just wouldn't go straight. All that got fixed with the front suspension design I got the idea for back when I built the V1, but refined it over the years. Green Formula V2 thanks @Another Brick in the World for editing this image :) Specifications: Dimensions: 30 x 17 x 12 studs (LxWxH) 442g (almost perfect 50:50 weight distribution) 1x PU L motor for steering and 1x BuWizz motor for drive powered by BuWizz 3.0 Pro 14° of caster in the front ~1 stud of front suspension travel 20:12 gearing from the fast output of the BuWizz motor improved bodywork for less weight and better cooling Now that it is finally more controllable, I can actually drive it fast. One day I was curious just how fast it can go on a straight flat road, and it turns out that is 30.3 km/h. Honestly didn't expect it to be that quick with only one drive motor, but I guess that's just the power of BuWizz :). Full video of the speedrun: This model has also been a place for me to try out some 3D printed stuff. First of which was an air intake for better cooling during hot summer days. I don't actually know how much it helps but I like to believe it helps at least a bit :) Other thing is a 3D printed replacement for the part 6574 (Gear Rack 1 x 2 with 2 Tow Ball), as it's a quite rare piece. The geometry is basically the same, I just made the connection to the ball joint thicker and got rid of the bottom slot for studs, all for strength. It works just like the original piece in my experience, but still haven't crashed with it so I don't know anything about how durable it is, but it surely saves some money if you already have a 3D printer. More about it: https://www.printables.com/model/1375874-lego-part-6574-gear-rack-1-x-2-with-2-tow-ball All in all I'm very happy with the model, it's small, fast and fun to drive. I will definitely keep it assembled for a long time. Video showcasing the model: Edited November 19, 2025 by N1K0L4 formatting Quote
gyenesvi Posted November 19, 2025 Posted November 19, 2025 Really neat packaging of all the electronics and nice body as well. I like that is has some interesting front suspension at this scale :) And great top speed! Quote
N1K0L4 Posted November 19, 2025 Author Posted November 19, 2025 2 hours ago, gyenesvi said: Really neat packaging of all the electronics and nice body as well. I like that is has some interesting front suspension at this scale :) And great top speed! Thank you! Quote
N1K0L4 Posted January 3 Author Posted January 3 Arctic Trail Truck Hello everyone This is my second attempt at making a trail truck, but this time I did it better so I felt like it was worth sharing. As last time, it's a 6x6 and I plan to run it at the BuWizz Gathering. My plan was aslo to have it as a bigger camera vehicle replacing the Mini Tracked Vehicle that has been serving me for over 2 years now. I wanted to use these spiky tires as I think they have better grip on loose surfaces. I got the name "Arctic" as in the snow (I know, I'm very lucky to have snow now, especially in Croatia) it kinda looked like one of the vehicles they have there, mainly because of the orange body. Specifications and features: steered by 1x PU L motor geared down 3:1 front and rear axle steering powered by 2x BuWizz motors gearing from the motors 12:20 + 1:5.4 (planetary hub) skid steering double wishbone suspension on all wheels space for one set of PU LEDs one "scale looking" seat working steering wheel connected to the steering motor 2x working fake I4 engines flatbed - place for accessories From the experience of the Mini Offroader I knew that I needed slower gearing than that so I went with 12:20 combination while keeping independent left-right side drive as that is still allowed in the rules, although I use it more to lock one side still for tighter turns like real trail trucks than for skid steering. I wanted to use bigger fake engine parts as they are more realistic and seem to me they might last longer and have less friction. They just about fit under the motors and almost go over the middle axle and are connected directly to the fast output. Steering was also geared down 3 times for smoother and more precise operation as in my previous trail truck. Front wheels turn to about 30° and the rear to half that, so 15°. There is also a limiter next to the gearing to prevent gear racks from going out of range. Working steering wheel was connected with a few bevel gears directly to the motor and it has whole 2 rotations lock to lock. You might see I used a interesting solution instead of a axle to connect a gear to the steering wheel. That is a 1/2 pin without friction and a 3L bar going through it. I did that so I can have the steering wheel half a stud further from the small frame to be able to rotate freely. Chassis was made to be as stiff as possible without weight in mind and with smallest overhangs. I used a lot if interlocking parts between the rear 2 axles to make that area as thin and stiff as possible. in the middle I focused on having all the gears and moving parts covered for better durability. I also managed to position all the electronics somewhat high off the ground so it can go through pretty deep water. I also want to talk a bit more about the suspension. It is a double wishbone setup on all wheels with 2-3 studs of travel. I the rear I had a problem with suspending it as the hard shocks were too hard and the soft ones were too soft, both with not that good articulation. I fixed that by connecting the 2 axles by a beam and suspending the beam instead (see picture below). This way I have one side suspended in semi-pendular way. That allows better articulation and control which axle is suspended more changing the balance. I can also easily add one more shock to be able to carry accessories on the flatbed. Body is... well a box. I did put the A pillars at a slight angle and it also has a place for a set of LEDs in the roof which make it a bit better than a box. The flatbed was made to be easily removable (only 2 axles need to be pulled out). Overall I'm quite happy with this model. It looks okay, with quite a lot of functionality. It is also quite capable, but a bit top heavy. Some more photos: You can find the .io file for the model here: https://bricksafe.com/pages/N1KOLA/arctic-trail-truck Video: Quote
2GodBDGlory Posted January 3 Posted January 3 Interesting rear suspension configuration! The dual engines are cool, too Quote
gyenesvi Posted January 3 Posted January 3 I like this, it has a nice drivetrain and steering solution, and also the twist in the rear suspension. I think it looks cool too! Btw, the 6L link exists in orange as well! Quote
N1K0L4 Posted January 3 Author Posted January 3 Thanks! 10 minutes ago, gyenesvi said: Btw, the 6L link exists in orange as well! Do they? Well, I guess I missed that. They must be rare than :) Quote
gyenesvi Posted January 3 Posted January 3 14 minutes ago, N1K0L4 said: Do they? Well, I guess I missed that. They must be rare than :) They are relatively new, and I think they appeared in a non-technic set. But it would fit this model nicely. I actually bought a few (on lego.com) just for these kind of usages. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.