vergogneless

Okay, thanks for the information! I'll see if I can find the original ones, but they cost around thirty euros with shipping to France:/ I'm also considering the fischertechnik tires, which are 100% compatible. According to the feedback, they are really good, and the price is unbeatable. https://www.fischertechnikwebshop.com/en-gb/tractore-tyre-d60-121661-en-gb?limit=100

Cool, thanks! It's not the first time I've seen them, and they've always caught my eye. What do you think of them? Are they of good quality? Do they stay well on the rim? Are they soft or hard?

Before switching to brushless, I used small Wltoys motors, brushed, and powered by 2S. In the end, it wasn't sustainable because the motor would get so hot that it melted its support, lol. The issue with the LEGO system is the friction, especially on models over 400g, which forces the motor to work even harder. But indeed, you can try using the original motor with a 3S battery and see how it performs. I'm curious to know! As for the gyroscope, it's quite troublesome. Speaking from experience, on all my models, I can test with and without it. And to truly understand the importance of this parameter, I can clearly say that without it, I would have given up on building powerful LEGO RC vehicles altogether. The servo motor alone NEVER puts the wheels back on a perfectly straight heading. The car always ends up going to the right or left, even with a positive caster angle. But in reality, the servo is not the issue, as it's a 2kg servo and works flawlessly. It always returns to position 0 without any failure. The reason lies elsewhere: the inherent play in LEGO steering systems can only be corrected with a software solution, namely, the gyro. With the gyro, your car will maintain an absolutely straight heading and correct it in any circumstance. Know that the best value for money on the market can be found at Dumbo RC, where you can get a remote (X6FG) + a receiver with an integrated gyro (also X6FG) for only 34€, fully adjustable.

Lego, I suppose, the ones in your pictures!

Good work again ! It does seem very solid. Do you have the reference for the tires?

I see, small brushed motors like those, powered by 3S, will generate a lot of heat, won't they? I agree more with your idea of directly finding a brushless motor! However, you'll need to change your ESC. Regarding the remote, does it have a gyroscope?

As a fan of small scales, I loved everything I saw on this topic! :D

Cool, I like the idea of modifying buggy motors. Do you have an example of a replacement motor? And what's your final setup (ESC, power supply, radio, etc.)?

@Lixander Yes, I saw that. You didn't really have much choice; it's the downside of electronic components designed for the Lego system: they are heavy and bulky, and they also lack in terms of performance and control. I have personally experienced both options. It all depends on your preferences and expectations: Total and hassle-free compatibility, comfort, but at the expense of power and precision (Buwizz). Or, power and precision at the expense of facing various new constraints (brushless system). In the first case, there's not much you can do to improve it. Moreover, combining a Buwizz unit with Buwizz buggy motors and an L PU motor for proportional steering can lead to unreasonable costs. Additionally, you would need a physical controller like a video game joystick to enhance control via a third-party application. In the second case, there are always solutions to mitigate or completely eliminate the constraints. The purchase of basic elements does not exceed 70-80€, leaving a lot of room to invest in extras to optimize your models. So, there's something for everyone; these are two quite different approaches, and each solution has its advantages and disadvantages. You need to align with your preferences and clearly define your expectations before investing to avoid disappointment.

I confirm that the Dumbo RC is definitely up to the task. In fact, I can highly recommend the latest model X6PM-350 with the X6FG receiver. It's smaller and more compact (about half the size), lighter, and has a better finishing quality. The fact that it's really small might bother some people, but it becomes incredibly portable, and it's a true pleasure to take it everywhere. The feeling is excellent, and I wouldn't go back to the old one for anything; it's a real evolution. It has exactly the same features as its big sister, with the only difference being that it offers "only" 350 meters of range (instead of 500+). Regarding the receivers, always go for the X6 "FG" for the gyro, as specified by Krxlion. You have the choice between a standard version or a mini version. I use both, and the mini can be useful for very small models, but I don't think it's necessary to insist on using the mini version when the standard one works just fine. It's important to note that the mini version has a small antenna, and I sometimes experience signal loss beyond 100 meters because this antenna is inside the car body. For the gyro, there are a few procedures to follow for pairing, activating the gyro, and especially changing its direction, but you'll figure that out in due time. The receiver must be securely fixed for the gyro to function properly. It should also be as straight as possible (parallel or perpendicular to the chassis, it doesn't matter), with the cables facing upward. Glad you're joining the brushless club ! EDIT:

Fun :D !

You are absolutely right, building a large brushless model is a whole different story compared to smaller scales! But there are solutions that work quite well (for example): https://www.avito.ru/moskva/tovary_dlya_detey_i_igrushki/motor_dlya_lego_technic_-_beskolektornyy_a2212_2310818883 It is an investment, for sure, but it's worth knowing that it ends up being much cheaper than a BuWizz 3 with all the motors. Even if you add metal parts, ball bearings, or 3D-printed components. Brushless motor + servo + ESC + receiver/radio control + battery = about 70€. With that budget, you can easily fill your shopping cart with additional parts :D

I love the design (especially on the very first image of your topic)!

Definitely, the previous design didn't suit me well. I gradually modified certain parts of the bodywork until I reached a kind of higher level in terms of overall appearance. The weight didn't suffer too much, only an additional 12g. What do you think about it?

Incredible construction, well done! Have you ever considered switching to brushless? You would have at least three times the power, no electronic cuts, and the maneuverability that this kind of vehicle truly deserves!

Here I am with some updates! I'm not completely satisfied with the design, but I worked with what I had. I haven't received my gray flex rods yet, so I might make some modifications later. Nevertheless, it lives up to its promises. It's incredibly lightweight at 364g. I reprogrammed the ESC, and it made a world of difference. After doing it, I realize it was absolutely necessary. To put it into perspective, I would say it's now a firm hand in a velvet glove. I adjusted the start to be soft and lowered the throttle response, while still keeping 100% power. Now, I can perform smooth and seamless starts at very low speeds without any jerking. But I can also press the throttle and go for a burn. This is officially my most compact, lightweight, and powerful LEGO RC creation. It handles the power of 3S without any issues, thanks to the ball bearings. They are definitely a game-changer for my projects.

@Johnny1360 Thank you for the idea! It's true that I'm starting to clutter the topic list. I'll think about how to present it and how to implement it directly from this topic. @Krxlion We posted almost at the same time! Thank you as well for your message, I duly take note of it :D As for the progress, I've found the best possible configuration for placing the electronic components. The weight distribution is nearly perfect throughout the chassis. I've done some tests at home, and the power it generates is simply incredible. I'll need to reprogram the ESC because the acceleration is too abrupt at startup. This thing is going to be really fast! I'll try not to overload it with too many parts for the body; I want to keep it compact and lightweight. I'm considering giving it an entirely gray design as a change. Maybe with small touches of yellow.

Hello everyone and welcome to this topic that gathers all of my projects. For the sake of clarity and ease for everyone, everything will now happen here. The title only concerns the current project and will change as needed. To view the current project, I invite you to navigate to the latest posts in this thread My old projets:

I strongly salute the project, even though it completely surpasses me !

@TechBricks Thank you for your message, I appreciate it! I have also subscribed and discovered your enormous monster truck with the pneumatic system, especially the suspension. I left a comment because it particularly interests me for my previous model :D EDIT: I forgot to attach some current photos because I simply added a dark grey 9x1 beam hole on the roof (and replaced the 2x1 beams at the front), and I think it makes a huge difference. It was really missing before.

@FriedlS Hi bro! Thank you so much for supporting my passion for small scales :D That's a great question/remark! As you've seen, the motor mount is built in a quite peculiar way, not symmetric at all, but I don't have any other choice if I want to maintain a small scale. Furthermore, the parts with 3x1 ball bearings are of mediocre quality, and they simply don't hold properly if they're not well fixed and secured. And finally, by using a 1:2 ratio, it shifts the axis by 1 stud compared to the motor's axis, which makes the whole assembly even more complex. However, I'll let you in on a secret, the axis won't stay resting on the arms without ball bearings for long! After a few tens of minutes without lubrication, it will rely solely on the ball bearings, if you catch my drift :D The 1x5 arms ultimately serve the purpose of properly attaching the 3x1 ball bearing pieces.

@Bluehose Yes, you have more or less answered. The gyro has several uses, especially in my situation (rear direct drive). It is indispensable. Firstly, it allows you to correct 95% of faulty trajectories, spins, slides, drifts, bad bounces that would otherwise lead to disastrous outcomes, and so on. Moreover, once you exceed 25-30km/h, even the slightest gravel can cause a catastrophe without it. Secondly, it helps maintain a straight course. It essentially eliminates any play in the LEGO steering systems.

The construction is complete, and the initial tests have been conducted. Aesthetically, I am quite satisfied with the outcome, and I have achieved the initial objectives: Increase the ground clearance by 1 stud, bringing it up to 3 studs at the front. Reduce the width and height of the model. Incorporate a ball bearing in addition to the existing ones on the motor shaft. Revamp the front section with a vertically positioned servo motor (to enhance robustness and improve the pivot point). Redesign the motor mount to accommodate the ball bearing components. Install a complete set of four shock absorbers. Naturally, aim to reduce the overall weight (going from 470g to 412g). For comparison with its larger counterpart: That being said, the initial tests yield mixed results. The major issue, which I anticipated and is why I have been using only rubber bands from the start, is that the shock absorbers are too stiff. Even the "soft" ones used here. They don't perform their function properly on such a small, compact, and lightweight scale. However, it's not all negative. It still remains fun and very responsive, as always. Nevertheless, I believe I will change the ESC and replace it with a Surpass Hobby one. I still have an older bidirectional ESC, but once you've experienced the higher-end range, it's difficult to go back. As usual, I won't make any modifications to this particular model. I prefer to rebuild one from scratch, as collecting models is primarily a pleasure for me. Regardless of the driving qualities and flaws, it will always be a beautiful object to display. And, of course, I will create a big video for this one as well because it remains a pleasure for me, above all.

Here are a few photos showcasing the progress of the project. What are your thoughts?

Heyy everyone! I'm back again with an update on the latest project, which is now mostly completed and awaiting the grand final video. Continuing my quest for perfection, I am still experimenting with mini Trophy Trucks. The goals for this particular build are as follows: Increase the ground clearance by 1 stud, bringing it up to 3 studs at the front. Reduce the width and height of the model. Incorporate a ball bearing in addition to the existing ones on the motor shaft. Revamp the front section with a vertically positioned servo motor (to enhance robustness and improve the pivot point). Redesign the motor mount to accommodate the ball bearing components. Install a complete set of four shock absorbers. Naturally, aim to reduce the overall weight. Now, let's delve into the specifications: A2212 1000kv Brushless Motor Bidirectional 30A ESC Gray Geek Servo 360 Dumbo RC X6PM-350 + mini X6FG receiver (with an integrated gyro!) 3S 450mAh battery Carbon fiber rear axle Ball bearings on front and rear axle + motor Gear ratio: 1:2 It will be adorned in a dark gray and orange color scheme. Without further ado, here are some initial photos. Feel free to share your thoughts and feedback if necessary!