KevinMoo

Eurobricks Vassals
  • Content Count

    96
  • Joined

  • Last visited

2 Followers

About KevinMoo

Spam Prevention

  • What is favorite LEGO theme? (we need this info to prevent spam)
    Technic

Profile Information

  • Gender
    Male
  • Location
    Changchun, China

Extra

  • Country
    China
  • Special Tags 1
    http://www.eurobricks.com/forum/public/style_images/tags/technicgear2.png

Recent Profile Visitors

1543 profile views
  1. All those rendered parts in the parts list on each page are generated by LPub3D, when opening a MOC file in LPub3D, you can find all individual parts under the “LPub3D”-“assem” folder. All the rest are just Photoshop work, including frames, arrows, texts, chroma keying, etc.
  2. hey guys, I have completed building instructions for the Monster Truck: Besides the change of color scheme and other minor improvements, I’m using a new full-frame camera to shoot all photos for a better picture quality. It’s now available for free on Rebrickable: https://rebrickable.com/mocs/MOC-26278/KevinMoo/monster-truck-with-automated-differential-lock/ Hope you like it and enjoy building!
  3. @LegoTT I can really appreciate that, and this is definitely not personal, especially not against you. I was just trying to stop a trend in this topic, and you don’t need to apologize. Thanks for sharing your experience.
  4. This seems to be a legit auto diff lock, but I don’t know the existence of it until now. If you ask me “Is this your original idea”, yes it is, but I will never know if I’m the first one to have such an idea. Again, to me it doesn’t matter who did it first. I never claimed to be the first to do anything, and I don’t want it either. If someone just want to claim “1st prize”, fine, just take it. But it’s meaningless to discuss topics like “the first one to do something” in my opinion, So please, stop posting time marks.
  5. Hey Gerard, Firstly, it doesn’t matter who came up with an idea in the first place, to me it’s not important at all. secondly, I don’t believe you have read this topic or watched my video thoroughly, but I have studied your video well enough to believe that our models have completely different structures, serving completely different purposes. What I have designed is a differential LOCK that locks when the vehicle is driving straight to achieve maximum off-roading performance, and automatically unlocks when it takes a turn for better maneuverability. In your video, I don’t see an actual lock.
  6. There is one thing which has a great influence on off-roading performance, that is differential. Open diffs will severely cripple off-roading capability of a vehicle, but without a diff, turing radius is going to be awful. Can you really balance the two? I’m showing you two new MOCs regarding this topic: a Land Rover Defender & a monster truck. (There will be two new official LEGO sets which happens to be a Defender and a monster truck, I think this is pure coincidence...) 1. Land Rover Defender I have never tried building a model with no differentials. So maybe I should give it a try to see how it performs. The drivetrain is pretty straight forward: Then I started adding details to it. I was expecting it to be a lightweight model, but when it seems aesthetically acceptable to me, the final weight (1.3kg) is beyond my expectation (around 1kg). Other than that, the actual turing radius is really bad, something I can’t take. So Let’s not talk about performance, just take a look at some details: I have to say this MOC is not too sucessful, so I didn’t bother making a video for it. Even it is fully remote-controlled, to me it is still a display set. 2. Monster Truck So how can we really get maximum performance without losing the benefit of differential while cornering? Most of us know the answer: diff lock. We’ve seen so many great builds with manually or remotely controlled diff locks, and I want to make something different. Then I came up with an idea: Can I design an automatic diff lock, which locks when the vehicle goes in a straight line, and unlocks when it takes a turn? Of course in many cases the vehicle also needs that diff lock to be locked when it takes a turn, but considering it’s a fully automatic action without an extra motor to control the lock, This is an acceptable trade-off. Besides, other factors could somehow compensate for that, like grippy tires, responsive suspensions, etc. I soon realized that this is not going to be a tough job. I only need a simple mechanism that somehow links the diff lock to the steering motor (Servo motor). A video (4K) to show it all: The concept of this MOC came from Monster Jam trucks, that’s why it has roll cage and detachable body. The chassis and axles is no way near a real monster truck, it is built solely for the purpose of demonstrating the auto diff lock. And I think it performs great and seems reliable enough. Hope you like these two MOCs!
  7. KevinMoo

    [MOC] “Challenger” The Supercar

    Hey guys, I have completed the MOD. My goal is to rebuild a better seat, so I have to find out a way to reposition the propulsion motors to make room for the new seats. This is the original model: First idea came to my mind is to rotate the motor 90 degrees so it could be lowered 1 stud, and let the seat sit on the flat side of it. It came out like this: It’s definitely a better solution, but the seat still looks small and not quite authentic. So I decided to push it to the extreme: move the motors forward, then put the gears behind the seats, and make the driveshafts pass through the seats. It turns out to be feasible: Now this could be called a significant improvement. Though the ideal location for the seat should be 1 stud downwards and 1 stud backwards, this is the best I can do. The improvement comes with a trade. There is a speed loss due to gear change. But this is as far as I am willing to spend more time on it. It’s a tough job to balance aesthetics and functionalities for a motorized supercar at this scale. I think it well deserves the name “Challenger”. Hope you like the change!
  8. KevinMoo

    [MOC] “Challenger” The Supercar

    Guys, thanks for your comments and advices. I’m working on a major improvement of the interior, including the drivetrain and the seats. I rarely do further optimization for a published MOC, but this one shows a great potential to be a better MOC. So stay tuned!
  9. EDIT: Improved Interior -------- I’m a big fan of medium-size models. Ever since the first appearance of the curved panel (part 18944), I’ve been planning to make something out of it. And it couldn’t be more suitable than putting it on a supercar. Finally, presenting my first ever supercar - the Challenger. This MOC is equipped with 56 x 28 tires, making it a roughly 1:11.5 scale model. It’s really challenging to design a bodywork with complex curves for a supercar at this scale, hence the name Challenger. BODYWORK Normally wheel arch made of liftarms has flexible axles inside, but I choose to use rigid hose because it’s slightly better than soft axle in terms of keeping shape when the desired curve is short and subtle. Together with the curved panel, they create a beautiful silhouette. Even though this MOC looks like a Porsche, and indeed it is mainly based on Porsche design, but it is not a Porsche. Especially when you look at the rear end, it’s definitely not a typical Porsche style. Actually the whole bodywork referenced several car brands, it’s more of a combination of all my favorite parts from different design styles along with some of my own thoughts. DRIVETRAIN & SUSPENSIONS It is powered by 2 L motors, and steered by servo motor. Front suspension is a conventional independent suspension; rear suspension is a multi-link suspension which incorporates what is called a Watt’s link. It works just like a Panhard rod, but slightly different from Panhard rod. PERFORMANCE COMPROMISES & IMPERFECTIONS Due to limitation of the size, I really couldn’t put everything I want into this MOC. One big problem is the seat. Since the motors take too much interior space, the seats have to sit high on the motors, while in a real car they are much closer to the floor. And they don’t look like racing seats. Secondly the rear suspension is really stiff and suspension travel is short, so it couldn’t take full advantage of the Watt’s link. Also the absence of working headlights and taillights and the noncontinuous curve of this liftarm-made wheel arch are the compromises I have to make. Anyway, I’m basically satisfied with this MOC, it’s a good start of creating motorized medium-size supercar for me. Hope you guys like it And happy Chinese New Year!
  10. my major concern will be the central differentials. I have built a third iteration of my dual-driveshaft car, which features dual central diffs and many other functions. All functions work fine except the central diffs. Here are some renders of the drivetrain (sorry I can’t show you real photos): I was hoping a dual-central-diff-setup will reduce the possibility of gear slipping inside the diffs, but it still happens every time I put it on high gear (low torque). The complete chassis weighs only 1.08 KG. I really can’t figure out how to improve it anymore, could be the result of too much frictions. I’ll probably give it up for future projects. So my suggestion is to be very careful with central diff, it could be the weakest part of the whole chassis even with two of them.
  11. Being a Chinese myself, this is always the kind of topic that I feel embarrassed and ashamed to talk about. Why thief like LEPIN can still survive? Simply because there is a market. There are so many people who cannot afford to buy “luxury toys” like LEGO for their kids or for themselves in China. Most of us Chinese just don’t care if a certain product is a knockoff or not, as long as it is functional and cheap, it is going to be popular. Of course there are many well-educated elites who at least have respects for others hard works and are willing to pay money for it, but to be honest, the majority of the whole population in my country don’t have that kind of awareness. What’s worse is that most of them don’t feel shame at all. What’s even worse, they took it for granted. On the road to modern civilization, we Chinese have a long way to go. So from my perspective, there is NOTHING you can do about copycats in China. Forget about watermarks or any kinds of similar methods. That sounds sad, but that’s the fact whether you like it or not. Even if LEPIN falls, many other LEPINs will rise again. I definitely am not trying to discourage anyone in this community, and I would like to see any kind of actions to be taken to provide a compensation for the creators. I’m not sure if CF is going to work, but it’s worth a try. Every creator will put a lot of work into making instructions if he decide to share it whether for free or not, and he will probably take a risk. I just don’t want to see anyone lose interest in creating because of that risk. I hope we all can build for fun, and share for fun. At least that’s what I did.
  12. KevinMoo

    [MOC] Dual-Driveshaft Pickup

    I won’t share .lxf file for MOCs with no real building instructions any more, I’m so sorry about that.
  13. KevinMoo

    [MOC] Dual-Driveshaft Pickup

    Thanks. When I first started making instructions several years ago, I had thought about watermark, but eventually I gave it up. It’s a bad user experience, and it cannot prevent those who intend to steal your work from really doing it. I have encountered people making a profit from my free instructions. Being a Chinese I’m kinda numb about piracy, that sounds sad, but I just don’t want to spend more energy dealing with things I don’t want to deal with. So far I haven’t found someone claiming copyrights of my works, I think most people do have a bottom line. Since I’m willing to give my hard work for free, I’m also willing to take the risk.
  14. KevinMoo

    [MOC] Dual-Driveshaft Pickup

    Building instructions available now Download link: https://rebrickable.com/mocs/MOC-16304/KevinMoo/lego-technic-dual-driveshaft-pickup/ Enjoy building!
  15. KevinMoo

    [MOC] Dual-Driveshaft Pickup

    I'm totally fine with it. I like building with 62.4mm tires, basically these tires determined that the truck cannot go "too extreme". I will be more cautious for my future, heavier model with similar struture.