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nicjasno

Eurobricks Knights
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Everything posted by nicjasno

  1. nicjasno
    I broke some 8880 hubs aswell.
  2. nicjasno
    Looks like this is going to be an audi. Nice sculpting.
  3. nicjasno
    Most R/C wheels are plastic and not that heavy, but they are bigger in diameter and have more momentum as such.
  4. nicjasno
    I have 3d printed adapters for the Turntables for the new challenger project and they cost me 1eur a piece + a few cents for the main bolt/stud on to which the wheel mounts to.And with the new turntables, the slack is even less than with the old ones. Those black spacer-style adapters just increase the hub depth and make the slack in the lego hub even more apparent.
  5. nicjasno
    I like it.
  6. nicjasno
  7. nicjasno
    Pictures of how to make it in the link in the description
  8. nicjasno
    Most of your weight is inbetween the axles, and a dragster is designed to lift the front wheels of the ground. Something whch your car will not do. As far as the bike suspension goes that you made, it is very different from the real life forks that you posted in the previous post. The real life example has very small changes in caster, yours has huge ones, and is tilted too much actually.
  9. nicjasno
    This guy has the right idea, but the concept has a few fatal flaws, like the huge bump steer in the front suspension setup, and you have the better drivetrain setup.
  10. nicjasno
    As i suggest the whole time, you need a different front suspension. The trolley cart wheel that you have now is the worst possible option.
  11. nicjasno
    Having the wheel supported on both sides is not necessary. The friction and rolling resistance are the least of your problems. And as you can see in the video i made, the cartwheel has the problem, that it is inherently unstable. Every slight difference between the rear wheels will immediatelly affect it, because the whole vehicle from the rear wheels forward acts as a giant lever on it. Your soft bike suspension is also not good, because there are gigantic caster changes during the suspension travel, making the whole thing unpredictable and unstable. Also, the center of gravity is not really important here, since the battery pack makes is pretty low. If i would be building such a vehicle, i'd use the double wishbone front, and have a single wheel as the drive wheel in the back, like a morgan 3 wheeler (if small rolling resistance is what you're after). Ultimately, i'd make a baja truck like chasis, with soft suspension and the proper front geometry. This would make it all very stable at high speeds over rough terrain.
  12. nicjasno
    The caster line needs to run through the center of the wheel. And the trolley cart wheels show how unstable they are the moment they loose contact with the ground. Which at high speeds without suspension, your wheel absolutely does. Mount a gopro to it and film while running.
  13. nicjasno
    Pictures: https://www.dropbox.com/sh/31ai04x1sck22uy/AAC0YLEAdiwdN5taF2khQ0G6a?dl=0
  14. nicjasno
    The bikes, when at speed, are stable in part, because of that very same caster angle. In cars, you also have kingpin inclination, which in combination with the caster provides the proper self centering.
  15. nicjasno
    The current setup is exactly what a shopping cart has. And just look at the wobble that happens on those wheels everytime they hit something, even a slight surface imperfection.
  16. nicjasno
    Yes, i did. But the problem is, you're doing testing on a smooth surface at low speeds, giving you false results.
  17. nicjasno
    Not in combination with some camber ;)
  18. nicjasno
    Your caster is tilted in the wrong direction. That's the first problem. I do have a very good and concrete idea how to do the suspension :) The motors and gears will be part of the rear live axle. The front will be an independent suspension with proper caster and kingpin angles, to ensure the wheels self center. The front also needs to be made with bionicle ball joints, to eliminate slack. I can design it all if you like. Don't have any of the r/c motors or the battery pack, but i can design the basics and let you adapt it to what you have.
  19. nicjasno
    What @PorkyMonster said. I think i speak for us all here, we want to see this thing go as fast as possible. But for this, you need to completly redesign the chasis. The suspension type that would best fit this is that of a baja truck. With the narrow motorcycle wheels of course. But you need a suspesnion travel of at least 2-3 studs, and the suspension must be soft enough that it settles about 1 stud when you put the weight of the car onto it. This ensures that the wheels remain in contact with the ground even if they encounter a hole/dip in the road surface.
  20. nicjasno
    I could help you design a steering that would actually work at high speeds if you want. I am really interested how fast this thing can really go. Also, it's not hard to see why the car would oversteer. The wheels loose traction, because there is no suspension that would ensure they keep in contact with the road. The flex in your chasis is not suspension. It's just a flexing chasis.
  21. nicjasno
    LPEs have more torque and power than lego motors. The less weight you have, the easier any given motor will be able to propell the vehicle. And the less strain will be put on the drivetrain.
  22. nicjasno
    Weight is always a problem.
  23. nicjasno
    Or Baja truck. Absolutely. This is starting to get off topic. But as long as the car is light enough, yes. The mustang is too heavy. The challenger will be much lighter, yet a bit bigger. Weight is the bigest enemy of your lego models.
  24. nicjasno
    The big cylinders are too big indeed, unless you need a high torque engine. In this case you'd also design the crank with more throw, to make use of the full extension of the big cylinder, Such an engine would be very slow though. The expansion engine will probably use a small cylinder for the high pressure, the normal cylinder for medium pressure and 2 normal cylinders for the low pressure sections. I do need to see what the exact volume(piston surface area) differences between the cylinders need to be though.
  25. nicjasno
    The E30 instructions will be free on LPEpower. Using onboard compressors is dumb. I'd rather have the car electrically powered then. Much more efficient.
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