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[WIP] Red Wolf - 4WD RC Buggy /w Buwizz
Didumos69 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi, It's been a while, but this winter I got my hands on the Audi RS Q e-tron set with the new wheel hubs for the strong (RC-capable) CV-joints. A year ago I got 2 Buwizz 3 units and a couple of Buwizz motors (their buggy motor remake) and with the hubs and diffs from the Audi I could finally continue a concept that I have working on every now and then over the past few winters. The idea was to create an off-roader with ruggedness and capabilities comparable to my Greyhound 4WD RC Buggy and Make a modular build with an easily removable body, just like with real RC cars Make the Buwizzes easily removable, so you can use them for multiple models Make it easy to reconnect the steering ball joints if impact caused them to detach The wheelbase is 3 studs shorter and the trackwidth 2 studs narrower compared to the Greyhound. The roof top is also 2 studs lower. All in all I strived for a little bit more of a race look. One of the ideas that I started with (about 2 years back), was a setup with 9L steering links that are positioned with a small angle, such that they are actually a little too short (about 0.8%), which gives them a nicely tight fit; when you use them at both the front and rear side of the steering setup that is. With this setup any rotation in one wheel hub translates to immediate rotation of the other wheel hub, without any slack. I also wanted to use 4 Buwizz motors to make the whole thing capable. At a certain stage I had a setup with the old wheel hubs and the new RC-capable CV joints, but I could only make that work for a RWD model, not for 4WD. 4 Buwizz motors on a single axle did not turn out to be a good idea. With melting axles and frames as a result. With the new wheel hubs of the Audi RS Q e-tron I could revert to 4WD and I could finally make the whole thing work. Here's a video of the first successful test-drive with the chassis only. -
[MOC] Rocky 42099 B model
Didumos69 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Rocky - 4WD Rock crawler buggy I would like to present to you 'Rocky', a rock crawler buggy with a body tilting angle that averages the angles made by the front and rear axles. My shot at a 42099 B-model. Instructions are available on Rebrickable. When I saw the first images of 42099, I noticed that the amount the body tilts sideways, is mostly defined by the rear axles angle, because that axle's suspension is the hardest - it carries the battery/control unit - and it's not pendular. That got me thinking; wouldn't it be nice to make a setup in which the body tilting angle averages the angles made by the front and rear axles? Just like how a Mars Rover averages it's body angle between it's rocker bogies - with a differential - but now sideways, not lengthwise. That way it should be possible to mimic the character of 4-link suspension, which is often seen in rock crawlers. So that was my objective with this B-model and the nice thing is that this model contains exactly the parts needed to build something like that. Axle articulation Here is the setup that interconnects front and rear axles. Like in rocker bogie suspension, you should regard the body as the differential house. The body tilting angle is defined by the two axles that point sideways. I used 4 gears in the differential itself to minimize slack in the system. There is some rotational slack of course, but this is even further reduced by 1:3 given the 20:60 gear ratio with the turntables. Center of gravity Besides the differential, the center module also houses the battery/control unit, because that unit includes the tilting sensor and I wanted the tilting sensor to show the tilting angle of the body. I also wanted to keep the center of gravity low and centered. However, putting the unit in this central spot did cause issues later on... The battery/control unit - not depicted here - plays an essential role in form-locking the whole center module. The battery/control unit can be slided out sideways after removing a few pins and parts. Spring suspension Besides axle articulation, I of course also wanted to include actual spring suspension, so I attached two main suspension arms to the turntables, one for the front axles and one for the rear axles. I suspended the main suspension arms with springs placed between the turntables and suspension arms. The springs are mounted differently to the front and rear suspension arms, giving the car a little more lift in the back, which adds to a nice inclination, or rake angle, of the whole model. The whole model nicely sinks into the spring suspension under its own weight up to about 40% percent of the overall spring travel. Drivetrain I wanted to have the most simple drive train possible, so the motors are directly attached to the frames holding the differentials. This is a crawler and with the new portal hubs, there is no need for any up or down gearing. The motors add to the stiffness of the main suspension arms. I also wanted to have a track width that is two studs wider than the stock 42099 build. After some playing around I found out I could use the new CV-joints the other way around to make that possible. Steering For steering I wanted minimal slack and double sided steering rods like in the stock 42099. I limited the steering angle to make sure the maximum angle the CV-joints make, does not cause any damage. I noticed the CV-joints start wobbling when the angle they make is too big. The steering rack assembly - as well as its back side counterpart - use a trick to minimize unintended movement (slack): The assemblies are 3 studs deep and incorporate 3L axles with end-stop. The end-stops are sticking out of the assemblies and make them slightly deeper than 3 studs. For this to work the end-stops need to slide along a smooth surface. This trick makes for a very nice fit with little play and still allows the assemblies to move very smoothly. Ground clearance To increase ground clearance I used a double wishbone setup, not suspended, to take advantage of the extra lift provided by the inclined wishbones. The rear wishbones are inclined more than the front wishbones, because there the CV-joints don't need to deal with the steering angle. At this stage I also added a set of minimalistic fenders ;-). Bodywork Finally, bodywork. This was the most challenging part for me. It needed to be removable, to provide access to the battery/control unit and I wanted it to live up to my foolproof standards. The whole model can be lifted by the roof or by the A(?)-pillars. At this stage I practically used all the pins that came with the set, so I had to do a lot of backtracking to get some pins available. I ended up using all pins, including the ones that came as spare parts. Interior RC don't have interior . When I wanted to test drive with a first bodywork attempt, I found out the hard way that I could not reach the on/off button of the battery/control unit. I had not taken that into account. Eventually I found a solution in making the roof openable, as if it were a hood, just by releasing two pins. The red 10L axle in the back can then be used to turn the controller on. After opening the roof, it can be removed easily, after which the sides of the body can be removed separately to access the battery/control unit. All together this has been a great experience. Especially the limited and pre-defined set of parts made it a real challenge. It forced me to revisit all constructions over and over again, and leave in only what is essential, without making concessions to my self-imposed building standards. I ended up using 828 of the 958 parts. -
Lego Tehnincs for me started with 42000 set. First step to own creations was small B-model modification Then I started to create my own creations. At that time I didn't even knew about other "sick" peaople and forums like this. So, as a first post, littlebit about what I have created until now. First creations was only from parts of 42000. First creation was some trike (or something like this) with font wheel drive Then there was (street)quad
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Lego Technic 2 x 42132 Alternative Model - Mahawk Buggy (Building Instructions) This is alternative model for Lego Technic 2 x 42132 Motorcycle (you need to have two sets). This robust buggy with aggressive view is made for aggressive terrain, as well "aggressive" child play. It has detailed interior with that thing which allows you to control direction of the movement, but without that stick which helps you go faster or slower. Also, it has kind of sit for driver, which might be not recognizable from first glance. The model has next Technic functions: rotation of all four wheels in both directions! Overall, those functions give capability to move these models with enormous speed in lego world! This robust model has passed many children quality tests and proved they great playability. If you interested in building this advanced model by yourself, you can get building instructions download links in description when you click on pictures or video, or below the images (if they will not be deleted by admins :-) ). Images: Lego Technic Set 42132 x 2 Alternative Model - Mahawk Buggy (Link to Building Instructions in the description) Lego Technic Set 42132 x 2 - Mahawk Buggy (Link to Building Instructions in the description) Direct Download link for Technic Building Instructions: https://play.google.com/store/apps/details?id=max.technic.building.instructions -
Lego Technic 42137 Alternative Model - Pull Back Buggy (Free Building Instructions) This is alternative model for Lego Technic 42137 Formula E - Porsche 99X Electric. This robust pull back buggy is made for aggressive terrain, as well "aggressive" child play. It has detailed interior with that thing which allows you to control direction of the movement, and that stick which helps you go faster or slower. Also, it has comfortable sits for driver and that man who is holding the map and saying left, right, left. etc. The model has next Technic functions: pull back engine connected with rear wheels Overall, those functions give capability to move these models with enormous speed in lego world WITHOUT YOUR INVOLVMENT! This robust model has passed many children quality tests and proved they great playability. If you interested in building this advanced model by yourself, you can get building instructions download links in description when you click on pictures or video, or below the images (if they will not be deleted by admins :-) ). Images: Lego Technic 42137 Alternative Model - Pull Back Buggy (Free Building Instructions in description) Lego Technic 42137 Alternative Model - Pull Back Buggy (Free Building Instructions in description) Lego Technic 42137 Alternative Model - Pull Back Buggy (Free Building Instructions in description) Lego Technic 42137 Alternative Model - Pull Back Buggy (Free Building Instructions in description) Direct Free Download link for Building Instructions: https://play.google.com/store/apps/details?id=max.building.instructions
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[MOC] Dune Buggy RC - 8284 Redesigned
cyberdyne systems posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Good day/night/whatever everyone! I want to share with you a little experiment of mine that got a bit out of control. I hope, you remember set 8284 and its really unique looking b-model. At least I do. Furthermore, it is one of my favourite b-models and I really wanted to pay tribute to it. Obviuos thought was, of course, to make it RC with the new Control+ elements. After half an hour I got something that could drive and steer. I even tested it in the local park, but... something was off. It just wasn't enough. However good looking this buggy is, its transmission wasn't created with electromotors and speedy driving in mind. Wheels tended to fall off. Gears in diff broke at least once. And offroading capabilities were...em... on the small side of expectations. And I got an idea! I decided not just to motorize this buggy, but completely redesign, reimagine it from technical point of view, keeping exterior close enough to what it was before. You know, like these like-oldtimer-outside-but-modern-inside tribute cars which car companies sometimes make. Also I wanted to make transformation function more interesting and useful. So, I started on the blueprints... And here it is! All modern all new Dune Buggy! With familiar face which got a facelift. Literally. New version of transformation not just shortens the car, but lifts all front section up While cockpit raises up, special levers make sure that headlights between wheels always stay horizontal. And not only that. Another special lever in the rear section locks the differential using new orange shifter. This way buggy becomes most offroad. And now - to the video! (With the new intro btw) -
I would like to present the result of my Winter-project. A big thank you to everybody who supported me in the corresponding WIP-topic and of course to @DugaldIC for challenging me! Instructions are available on Rebrickable. Features: Turn-table-based wheel-hubs with minimal slack 4WD by means of 4 L-motors powered by two BuWizz 2 units Fully independent suspension Steering with Servo-motor 30 degree steering angle with Ackermann geometry Caster angle Fake V8-engine driven by M-motor Can handle a rough ride Liftable by roof, nose and tail Everything in-system Stats: Parts #: 1844 Weight: 1980gr Length: 54 studs Width: 35 studs Height: 23 studs I hope this will pull @Blakbird back into Technic . Some stills from video-material. And finally a few short videos.
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Lego Technic Tamiya Neo Fighter buggy (but it is 4x4)
Lixander posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Among those 3 buggy`s/ truggy`s that I have to test-build them I just managed to add a 4th one. This one is the first 4x4 with 2 motors. As usual, it packs some buggy motors (2 of them, as I said), a servo, removable body (at least semi-detachable), positive caster-angle and full independent suspension. The weight is just under 900g; pretty decent, considering it is 4x4 and that has a pretty big body and some useless pieces to imitate the electric motor of the real RC buggy. Unfortunately, I think that this will only be available with normal RC batteries, because almost no existing hub for Lego is not fitting. -
This buggy contains a 3600KV brushless motor (2838). It has a pinion made from a LEGO axle and it runs a seriously good working drive-train. Together with the new 42109 differential and a (new?) 2D suspension method it turns out to be a fun car to drive. Please watch a video here. Especially the suspensions are worth having a look. More and more I'm using custom springs to create all sort of applications. Useful and useless. Almost useless is the spring-lock to open the hood. Very useful are the long front springs and the two-dimensional rear springs. Please let me know your comments. No building instructions available yet. If there is a need, let me know.
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[MOC] Police Interceptor
Anto posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
After a while without a new MOC (because of my studies ^^), I'm back with a new model! It was made for BuWizz. The aim was to make a model in the continuity of my cross kart. I wanted to get rid of the torque effect on the rear axle (as it was a suspended axle on my cross kart), that made the behaviour unsymmetrical in corners. So I used 2 BuWizz motors as wheel hubs instead! The rear suspension was made so the rear shock absorbers generate friction, in order to have a slow rebound. On my cross kart, the suspension was extremely reactive, but the kart was "jumping" on gravel. On this new buggy, having a slow rebound helps the wheels stick on the ground to gain adherence. However, I wasn't able to do the same thing on the front axle. Why a police buggy? I have never seen this before, I thought it could be nice. I wanted the design to be as agressive and massive as possible. I wanted the design to be close to Polaris or Can-Am, looking heavy, indestructible but fast in any situation. People had to fear seing it in their mirror. You may have seen that the main part of the bodywork was made with 2x5 panels. This was a very useful part to achieve the shapes that I wanted, and to have simple assemblies (no one uses complex building techniques). The BuWizz 3.0 has got 2 PF ports and 4 PU ports. The 2 BuWizz motors are connected to the PF ports while the PU L motor for the steering (acting as a servomotor) and the LED lights are connected to the PU ports. The performance is really great! It is absolutely impossible to use more than the half of the power into a house! And outside, the suspension works well. You can go almost everywhere without being stuck or loosing grip. I also had some crashes but nothing was broken nor fell apart! Little video: And the instructions! https://rebrickable.com/mocs/MOC-132106/Anto/police-interceptor I hope that you'll like this model, and see you soon for the next one! -
After 42099 and the whole new PU system, I'm here with a MOC that uses something a bit older - RC system. After all these years it is still the most powerful 100% LEGO solution. Watch it in all its glory: Features: RC drive - 2x RC motor, geared 3:1 (slower output) RC steering Front suspension - double wishbone, soft, long travel, positive caster angle, 7 stud ground clearance Rear suspension - floating axle, soft, long travel, 5.5 stud ground clearance Please watch the video to see this machine in action and for more details. I hope you liked this model.
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Buggy only from parts of 42077 set looking like Baja Class One Unlimited Buggy or Dakar SSV https://rebrickable.com/mocs/MOC-37203/klimax/trophy-buggy-42077-c-model-baja-class-one-unlimited-buggy-or-dakar-ssv https://rebrickable.com/mocs/MOC-39160/klimax/trophy-buggy-rc-version-42077-c-model-baja-class-one-unlimited-buggy-or-dakar-ssv more photos for all 4 versions here >> https://bricksafe.com/pages/klimax/trophy-truck-buggy-from-42077 using 84% of parts from 42077 dimensions 40x21x16cm 2 main objectives: 1) maximalize suspension travel 2) prepare RC version manual HOG version: * HOG front wheel steering * front suspension, axle with positive caster * rear suspension ***v1 linked wheels + 6-piston engine connected to rear axle via loom bands ***v2 independent suspension for left and right wheel, dummy engine without movement 2 RC versions: * bigger tyres *** 54120 Tyre 94.8 x 44 R Balloon *** 92912 Tyre 94.3 x 38 R * servo motor for steering * enough space for any kind of battery on co-driver's seat *** 8881 Power Functions Battery Box *** 88000 Power Functions AAA Battery Box *** 8878 Rechargeable Battery Box *** Buwizz *** CaDa * 58123 Electric Power Functions IR Receiver + 58122 Electric Power Functions IR Remote Control (where it makes sense, or sBrick) * motors for propulsion: *** 2x 99499 Electric Power Functions Large Motor *** 42908 Electric RC Race Buggy Motor (+ 32270 Technic Gear 12 Tooth Double Bevel needed!) * dummy engine without movement Version with 2L motors and BuWizz weights 1121g Any combination of power and motor configuration is working my other models from 42077 set (can be found on rebrickable and bricksafe): -
[MOD] 'Rusty Bucket' buggy
SilenWin posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Greetings, ladies and gentlemen! I'm glad to introduce you a modification of @Didumos69 Greyhound buggy Yeah, "Mad Max" inspired vehicle again First idea was just "increase durability and add some crawler abilities", but result exceed all my expectations. Adding planetary gear reduction 4:1 to all wheels increase offroad capabilities to sky high (keeping in mind perfectly working suspension of original) And final step - I decide to prepare for summer offroad Lego event in Moscow and for future festival, so I reworked exterior in postapocalyptic style. Other photos Here is LDD model of front hub with planetary gear reduction I used in my modification. Rear hub is done similarly, except for black connectors to suspension arms and without U-joint. Bonus: video from "King of the Hammers" race event in Moscow and photo from "Summer Brick" Lego festival in Taganrog, Russia Thanks to @Didumos69 for his amazing buggy and instructions, and also to @Shurik & @VerSen for cool photos! Hope you like this rusty piece of metal! -
[WIP] RC Heavy Buggy
Daniel-99 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hello everyone! Lately, I made several posts of my finished models, some of which was build many year ago, so i cant make more photos of them and add your suggestions to the build. Today i would like to share with you my recent project. Im building (developing) an RC Buggy in big scale. Im not trying to make a version of a real one, but the general principles i follow are the same with real buggies. General principles: - independent suspension with a big travel - Rear wheel drive - big positive caster on from wheels - 2x Buggy motors for power (1 per each wheel) - lack of the body - only the structural elements... - double steering arms (for stability and stiffness) I have begun this project a month ago, but then got interrupted with some 4x4 cars (i will make posts on them later). The first prototype This car is actually closer to trophy trucks than to buggies, but nether mind... Features: - Rear drive with live axle. Long travel, soft suspension. - Dual driveshaft: Buggy motors are connected to the rear wheel independently. - McPherson front suspension, positive caster, extra steering arm for stiffness (like in 42099) - anti-row bar at the front The main goal of the first prototype was to test the McPherson setup and the gear-ratio (find a good balance between speed and torque). I made a several tests, and was very pleased with them (see videos below) but many observations has been made for the future development. Main benefit of the McPherson setup is it`s compactness, since there is only one wishbone. But it also became the problem for the car, since additional wishbone gives more ridged structure. Also all axes in transmission has a lot of plastic dust in them - Buggy motors have made their job too well! Summing up, Im very pleased with the first prototype, but the general scheme should be changed! So the development continues... Im waiting for your comments and suggestions... It is not that easy to build a thing from lego that can drive "properly". THIS SECTION WILL BE CONTINUED! ;-) -
[MOC] Racing Off Road Buggy
zumaidi posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
A racing off road buggy inspired by Ariel Nomad Tactical. ( I have tried my best to match it :-) ) https://rebrickable.com/mocs/MOC-90673/zumaidi/racing-off-road-buggy/#details -
[TC20] 8408 Desert Ranger
Leonardo da Bricki posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hello! I am finally back from a long 3 year dark age... Though I will be disappearing again to finish my senior year away at university. I logged on just in time to see that I had 3 days left for this contest, so I challenged myself to a one-day build. And I think I have successfully completed the challenge! Here is my revamped take on the classic Technic 8408 Desert Racer. Clean and proper photos will be forthcoming tomorrow, with daylight, alongside an entry topic. Basic info: 1. The original model, being studfull, had a lot of half-beam differences. I have tried to replicate these as closely as possible, leaving the chassis an even width (4,6,8 studs) while the front axle has a half-stud offset, along with the fake engine, not to mention the entire steering system... 2. Some colors have been changed, including, but not limited to: the front bumper is now Dark Bluish Gray, as I don't have the cams in Light Bluish Gray, the flex axles are not black instead of Dark Gray, and all the bevel gears are now Tan instead of Light Gray. Also, the Light Gray 24-tooth crown gear that drove the engine is now replaced by the modern Dark Bluish Gray 24-tooth gear. The fake steering wheel is Dark Bluish Gray, as I apparently cannot find my Light Bluish Gray steering wheel... 3. All original functions have been kept, including rear differential, HoG steering, and fake V2 engine, driven by the rear axle. Please give feedback on this model, I would love to hear what could be improved. Photos: [TC20] 8408 [TC20] 8408 Revamp [TC20] 8408 Revamp [TC20] 8408 Revamp [TC20] 8408 Revamp Cheers! - Leo -
[TC20] Lego 8207 Dune Duster - remake
filsawgood posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi legofans! The idea of the TC20 competition seems very cool to me! Several years ago I already made an attempt to build a remake of 8414. Now there is a great reason to build my second set of Lego techniques - 8207. My father gave it to me when I was 7. My joy knew no bounds. And now, after almost a quarter of a century, I want to repeat this set in a new form. -
If you're familiar with this one of a kind band I probably don't need to introduce this mini build to you... Added also the missiles that can be folded out for some serious 'moose action'. Intro to 19/2000 (minus logo, of course) A blatant crossover attempt - just for fun & giggles... Nothing huge or complex but still a fun little build for fans of the band. Free instructions available @ rebrickable.com Thanks & have fun!
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As inspired by pg5200's Buggy and Tamiya's Fighting Buggy, I've built this RC Buggy MOC. It's simple, fast and stable. Features: - Total no. of pieces is less than 400 - Around 1/15 to 1/16 scale - Requires a BuWizz 1.0/2.0 or CaDA or Mould King remote battery hub (SBrick should be possible by placing the hub on top of the battery box) - PF Servo Motor for the steering - RC Buggy Motor or BuWizz Motor for the rear driving - Gear ratio is 1.4 : 1 - Transverse damper rear suspension similar to Fighting Buggy - Rear camber angle is about +1 degree - Optional 4 LED lights (instruction not included) Instruction available at https://rebrickable.com/mocs/MOC-76795/ Have fun and enjoy! It's not in Minifig scale, just give you an idea of its size. It has a +1 degree of rear camber angle.
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[MOC] Epic Alternate Pack for 42099
gyenesvi posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi, I think 42099 is a nice starter RC set of the PU line, so I set out to test what else can be brought out of all its parts. I'd like to share with you my set of 5 alternate builds from it. It has been a great exercise for experimenting with different options for suspensions, drivetrains and bodyworks, testing the versatility of this medium-sized set. In the end, all of the alternate models came out with quite different shapes, suspension techniques and motor/gearing setups, and I think I even managed to use those large turntables in some interesting ways. During my builds, I found that the set has a good array of structural elements, of course good drivetrain components, but is a bit limited on gears, axles and body panels. Nevertheless, once you get used to it, more configurations are possible than you would think :) Here are my builds in chronological order. Much more design details and images of each are accessible on the link behind each name. Here I shortly summarize the features and the differentiating factors of them.1) JeepyThis model was inspired by the release of the Jeep Wrangler set and its pendular suspension using the small turntables. - Pendular suspension using large turntables, both front and rear- 4WD slow drivetrain for good climbing, separate front and rear drive- Jeep-like exterior, focusing on the shape of the hood and the grill, plus the roll-cage 2) BuggyInspired by the release of the RC Buggy set, with this model the goal was to test how fast the the two XL motors can be geared up, along with creating a slick bodywork. - Independent long travel suspension with longer swing-arms both front and rear, high ground clearance- Fast up-geared rear wheel drive, independent for left and right wheel without differential- Positive caster angle at the front axle- Light-weight curvy bodywork, custom built seat 3) BeastyThis model aimed to test the possibility of building a live axle rear suspension using the large turntable, along with coupled motors for a stronger drivetrain. - Live axle rear suspension with push-rods for extreme articulation, independent front suspension- 4WD drivetrain with coupled motors driving both front and rear axles, adjustable gearing- Rough exterior, minimalistic interior 4) QuadroThe goal of this model was to build something other than a car, and to experiment with an unconventional motor setup. - Independent front suspension with positive caster angle, trailing arm rear suspension- V-engine built out of the joined drive motors, rear wheel drive- Functional steering rod- Chubby bulldog-like quad shape, bullbar 5) TrophyWith this model, I wanted to push the live axle possibilities further, creating long soft travel using only the short springs, and to find a sweet-spot in the up-gearing of the motors. At the same time aiming to create a larger-looking bodywork with the limited array of panels. - Long soft travel live axle rear suspension, independent front suspension- Rear wheel drive with motors built into the rear axle, independent left and right drivetrain without differential, faster gearing- Trophy-truck like exterior with curved front and long tail, imitated spare wheel All models can be controlled with the stock Control+ App, and the batteries can either be directly accessed from the bottom, or can be removed after detaching a few panels. All models are available separately or in a 5-in-1 pack on Rebrickable. I hope this makes you value your 42099 sets even more :) Let me know what you think! -
Small Dune Buggy - Lego Mini CLAAS XERION 42102 Alternative Build Free Building Instructions: https://play.google.com/store/apps/details?id=max.set42102.alternative.models Lego Mini CLAAS XERION 42102 Alternative Build - MOC - Small Dune Buggy (Free Building Instructions)
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Hi, As a winter project I'm working on a 4WD RC buggy. It will be heavily inspired by @agrof's Class 1 Ultimate Buggy, for I very much like the behaviour and the looks of that model. With this model I will also deliver to my promise to @DugaldIC to make an RC model. I was planning on finishing this MOC without a WIP topic, but I simply can't work without the feedback . It will have 4 L-motors and 1 servo motor. No buggy motors, for I will be using current-date parts only. Control will be done with SBrick. Sofar I have been working on the axles. The rear axles are very much inspired by agrof's model, but this time everything relies on perfect fits. They rely on the Pythagorean triple (5,12,13). The front axles are my very own addition to this model: 2 L-motors are integrated in the double-wishbone setup. Making everything rely on perfect fits, is one of my main challenges. The second challenge is to make everything relevant form-locked. And of course the model needs to perform. All wheel hubs are turn-table/u-joint based: Sofar I have only been designing digitally, but I did check the most essential constructions in real life already. I will show progress when ever I have something to show. If you have any comments, feel free to reply. I'm new to motorized building so I can use some feedback.
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[MOC] 42099 C model Buggy
gyenesvi posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi, I'd like to share my second C model for 42099, inspired by the recently released off-road buggy. The design goals were 1) faster speed 2) responsive and long suspension travel 3) lightweight and curved shape.The wheel hubs and the differentials perform down-gearing, so I decided to apply 3x up-gearing by a ratio of 5:3 and skip the differential to make it faster than the original. Since the differentials are not used, the small gears can be used for up-gearing with perpendicular meshing of gears, which is smoother than the parallel meshing of the 20 and 12-tooth gears. I decided to use rear wheel drive only, one motor driving each rear wheel. I managed to compact the drive-train with the following setup: For suspension, I wanted a long travel and a wider wheel base, so I tried to increase the length of the swing-arms. The rear suspension seemed simple with 7L beams, but the front suspension was more difficult, as I had to increase the length of the 6L steering arms in the set by 1 stud, so I had to apply some tricky workarounds. Furthermore, I wanted a lightweight axle with a positive caster angle, with the steering motor integrated closely to the axle. The result has more than 6 studs of ground clearance and 3 studs of travel and is quite responsive: The battery is integrated into the middle of the model to distribute the weight between the two axles, and to provide easy access from the bottom. The whole base looks like this: The bodywork proved to be the most difficult to get right, since the panels available in the model are hard to use to get the light-weight frame-like body that I wanted. After taking some inspiration from the shape of Madoca's Blue Lightning buggy, I got the hang of using the arched pieces and the flexible hoses to build the curves, and used some of the panels to finish the body with a simple roof and hood. The roof is attached very strongly to the base, so the car can be lifted by it.As the small grey seats in the original just didn't feel like a match to the overall shape and scale of the model, I gave building a custom seat a try. Luckily, the few available red pieces were just enough to make a black seat with two red stripes :) I think it adds a lot to the overall look of the model.Here are a few more pics: Finally, here's a video of it in action: Building instructions available on Rebrickable. Let me know how you like it! Cheers, Viktor -
[MOC] BUGGY - 42122 Model B
eric trax posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
During a break from building agricultural machinery, I created a cute Buggy from 42122 set :D I had to buy this kit. I knew very well that the new tires were too small for a tractor, but they are perfect for my other WIP model, which has been on the shelf for almost a year. I did not follow a specific buggy model. I was inspired by various vehicles, their proportions and appearance to create my version. I associate it most with desert vechicles. The functions that have been added: HOG control and independent rear suspension, which works nice and soft. Unfortunately, the attempt to use the turntable to create the front suspension failed. This idea changed the appearance of the vehicle a lot, so I gave it up with that. I used 577 items out of 665 available in the set. My first building instruction is also available at: https://rebrickable.com/mocs/MOC-61843/M_longer/42122-buggy/ https://sellfy.com/m1longer/p/42122-buggy/ Hope you like the model :) -
Fastest Lego RC Ever?
1nxtmonster posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I put together a super-fast mini rc chassis. It has buggy motor geared up 20:16 for drive, and servo for steering. Lipo and v2 receiver provide power. It goes a measured 17.5 KPH (11 mph). So I was wondering if anyone built anything faster. Video:
