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z3_2drive

Eurobricks Knights
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Everything posted by z3_2drive

  1. z3_2drive
    Saw this in my subscription box yesterday, good job! I like the stickers, they give the MOC its own personality, and the ability to fit different motors is always a plus
  2. z3_2drive

    Currently in a mini-dark age :(

    1. Dannylonglegs

      Dannylonglegs

      :(

  3. z3_2drive
    Beautiful progress :thumbup:
  4. z3_2drive
    This is an awesome little MOC, perfect scale, would like to see it with black wheels. Do you plan on making instructions?
  5. z3_2drive
    Get the simpler, smaller remote please. For a moving vehicle like this one the variable controls are bad and you can lose control easily. The simple controller, as Rohan said, takes advantage of the return to center function of the servo which is a must for your MOD.
  6. z3_2drive
    I feel bad for the judges. Do many great MOCs are coming out of this contest, and this 930 is definitely near the top!
  7. z3_2drive
    I'm a sucker for roll cages. Amazing work so far!
  8. z3_2drive
    You win. Seriously amazing MOC.
  9. z3_2drive
    Can you give us some details on the modified u-joint from a previous WIP photo?
  10. z3_2drive
    To clarify, I didn't break the 8880 hub, mostly because I noticed the issues before any hardcore testing. There was a lot of friction and the hub+CV part shaved off some material, but as nicjasno said it is not sturdy and can break under high stress. The printed CV parts haven't broken yet, and I've put them through hell. But that was with buggy motors. I can't speak for their strength against hobby grade rc motors.
  11. z3_2drive
    @JJ2 just a heads up, the hubs from the 8880 are pretty flexible and will have a toe in/out effect under strong acceleration, and running that setup at high speed will quickly damage the female CV counterpart. I'm not sure if lubrication will completely prevent that, but apply a lot!
  12. z3_2drive
    Looking at this build and your older large scale builds, I feel like I'd want to go the way of using large turntables as hubs with non Lego wheels. As your build shows even the sturdiest of constructions have slack due to use of ball joint pins and small hubs. I can't imagine building at your level but I'm definitely going to give it my best shot, watching these threads really help, hope this MOC turns out great!
  13. z3_2drive
    Will it be an LPE powered MOC? Love the way the chassis is put together and I'm eager to see more pics, especially with the wheels off to see the suspension in more detail.
  14. z3_2drive
    Can you show your use of bearings in gearing down the motor?
  15. z3_2drive

    putting Lego on hold during a big move

  16. z3_2drive
    In the future I plan to start a project similar to this, but more likely a lower, wider, road/rally car. Do you think that a light build (My last build was about 1.6 Kg) with a brushless motor and Li-ion batteries could survive without harming original parts? I have lithium grease and bearings are an easy find, and I will most likely get a 3D printed motor mount to merge the motor/servo to the Lego chassis. As for suspension I'll use effe's printed spherical gear adapters (CV joints) I have now - they seem to be very strong and I'm curious if they will survive a new level of crazy. If not, a simple live axle. A lot will have to be tested, for example if a differential is even possible to use without breaking it, or if the motor will have to be mounted on the axle, as well what ratios to use to get the max Rpm at a sensible level. I'm eager to read how you overcame the challenges in this model
  17. z3_2drive
    You saw my comments on YouTube-really like this project, now for the discussion. I voted yes for obvious reasons :) And in the future I might try something like this, and I support those who do, as long as it is well thought out and not messy (least possible Lego parts mangled) which is hard when non Lego motors are thrown into the mix. This is where I've drawn the line with my past builds, because with non Lego motors it just feels not so Lego anymore. My last model only needed the motor controller to be attached to 2 5x7 frames with strong adhesive tape, which can still be removed. The pneumatic cylinders were the only truly modified Lego parts, everything else was original or printed. When builds like yours are done with respect to the original parts, I fully appreciate it. Can you explain or provide picture of how the drive and servo motors combine with the frame? If I attempt this in the future I will try to use printed or aluminum replicas to merge the non Lego motors to the Lego frame. Epoxy should be a 'if nothing else works' option. One last point: for me, I only need a couple more parts to make something like this, so it isn't a issue of cost, but for someone to attempt this for the first time, the required costs would be better spent towards an actual hobby RC project or RTR, if performance is what they're after. But, if they still enjoy the experience of building their project from scratch and challenging themselves, then doing something like this is fully respectable. Also, Lego speed record is a flexible term, maybe we should categorize it by original parts, custom electronics and power source, and custom electronics including motors :D
  18. z3_2drive
    Like others have said, the models are getting better and better. It's really neat to see such fast progression, and great job on these, the video is well made too. Very unique cars, and good luck in the future!
  19. z3_2drive
    All that matters is that it accomplishes what technic is supposed to - functionality and following the real thing as closely as possible. Clearly the Porsche fails to follow this underneath the accurate bodywork. It was full of opportunities to improve upon hubs (reducing slack and offering multiple mounting points for complex suspension, and maybe some parts that can be used to create a mcpherson suspension but that can be used elsewhere, and a revival of the spherical gear CV joint technique. The model doesn't have to be perfect, it just has to improve upon the old or fix known issues. I appreciate the new wheels, now we need proper parts to follow. As for specific models, anything rally-style would be great, something outside the typical road-car range.
  20. z3_2drive
    Thanks guys! @Lox maybe one day...
  21. z3_2drive
    Thanks for the positive feedback everyone! @effe the wheels seem very stable, slightly more flexible than a Lego ABS wheel, which might be a factor in the rubbing issue, but I really like the wheels and can't see any issues. @Didumos yup, his ideas directly influence the design, and he's helped me with fixing suspension issues on previous versions. Not to mention his custom hubs are a necessity for any heavy, high speed vehicle. @Andy slightly less wheelspin @tim yeah, the angle might contribute to the rubbing of the wheel, I might reduce the angle if it becomes a problem.
  22. z3_2drive
    Beefy looking wheels! Eager to see the performance.
  23. z3_2drive
    Thank you! The wheels are fine, the more recently printed pair seem to be higher quality and didn't require any sanding of the pin holes, but you might want to loosen the axle hole a bit. Overall I'm pleased, but with my wheel hub setup which is particularly wide on the bottom (front axle) the wheels rub slightly and this results in a good amount of friction. I might change something to prevent this, but that's on me. They also have a nice offset, which always helps handling.
  24. z3_2drive
    Thanks guys! Anti-roll bar helps slightly in the back since the rear is a bit heavier, but they are not as stiff as I'd like. Pneumatic cylinders come with rubber parts inside that help seal air, simply remove one to get a spring inside and put it back on. Bionicle parts hold up fine, I can lubricate them for less friction in the steering but I'm running them dry and they still work good.
  25. z3_2drive
    Hello! I'm back with another MOC, most likely the last one for a long time as I'm rapidly approaching a Lego dark-age of my own (college). This time around I'm finishing off my series of high-speed vehicles with a special rally-style chassis. It is my best handling version so far and it actually has bodywork (more of a tubular rollcage). Details: RC - featuring the custom electronics I've been using for previous versions. Link for those who haven't seen my setup yet. 4 Buggy motors for drive (2 driving each rear wheel, disconnected in the middle). Servo steering (normal Lego servo). 4 Wheel independent suspension - rear includes anti-roll bar and shorter top links while the front has caster and active camber due to shorter top link. Both axles have modified pneumatic cylinders acting as springs+dampers together. Extremely sturdy chassis with little to no twist (I tried hard to twist it from end to end, doesn't budge) plus sturdy rollcage that can be used to pick up the MOC. 3D printed wheels by efferman, as well as 3D printed spherical gear counterparts that act as really strong CV joints. The sturdy construction allows the suspension to work as intended, absorbing every bump. Here is the video: And now for a photo dump: Hope you guys like it! Sorry purists
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