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Didumos69

Eurobricks Dukes
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Everything posted by Didumos69

  1. Didumos69
    To do the Blakbird-fix without adding parts to the set you can switch the 4 half bushes in the handgrip of the luggage bag with the pin joiner in the D+N+R-selecter. Or even better, if you don't like the yellow half bushes on the paddles you can use the yellow ones for the D+N+R-selecter and the LBG ones from the bag for the paddles.
  2. Didumos69
    To do the Blakbird-fix without adding parts to the set you can switch the 4 half bushes in the handgrip of the luggage bag with the pin joiner in the D+N+R-selecter. Or even better, if you don't like the yellow half bushes on the paddles you can use the yellow ones for the D+N+R-selecter and the LBG ones from the bag for the paddles.
  3. Didumos69
    For those that have been genuinely upset by the events of the past 24 hours, maybe this will help you out. There will be a Lego and Duplo Therapy session on Monday, June 27th. This session has also been postponed due to unforeseen circumstances, so you will be able to meet with fellow sufferers. (Sorry, couldn't resist :wink: )
  4. Didumos69
    Thinking about how to avoid this kind of mistakes I think TLG could make better use of its fan base. I know that we - Technic AFOLs - represent only a fraction of the whole Technic customer base. But I also know that there are a lot of kids out there that know about people like Paul Boratko, Sariel, Nico71 or Madocca1977. Let's refer to them as the community heroes - there are more of course. Now what I think TLG should do, is to occasionally invite a community hero to take the lead in designing an 'ultimate' set. That might not only work out as a good marketing strategy, but would also be a means to utilize the intellect of the community and eventually to make ultimately good sets.
  5. Didumos69
    I think I get your point nerdsforprez. I like to see myself as an inductive type a guy. I buy sets for my kids, but for myself I prefer to produce my own designs and buy my bricks at bricklink. For me reading blakbird's post felt like reading an exciting book. I could almost feel the sensation of a great discovery and I could only wish it was my story. Knowing that this is keeping a whole community occupied makes it even more exciting. So I can't help having enjoyed Blakbird's story. I understand that the flawed Porsche triggers all kinds of sentiments, but I think I also see the silver line of all this.
  6. Didumos69
    ...which works out especially well when calculating with multitudes of 6, as adding/subtracting 1 gives many prime numbers: 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 37, 41, 43, 47, all prime numbers except for 25 and 35...
  7. Didumos69
    You're welcome! Btw, using gears with prime number of teeth is a bit too strict, for avoiding resonance it is enough to make sure the numbers of teeth of each pair of engaged gears do not share a common divider other then '1' (iow, the numbers need to be 'mutually prime').
  8. Didumos69
    Blakbird, thank you for this fine analyses and for pointing out a solution. It would be nice if this knowledge gets its place in a kind of appendix of the original post, but that will probably be taken care of anyway. When this solution will be part of some kind of errata sheet, it will probably be wise to use 4 half bushes to avoid mistakes
  9. Didumos69
    I can't wait to see a video of the gearbox running through gears 1 to 8 and reverse. If I'm not mistaken this setup with 2 serial gearboxes - even though it will eventually be operated by one set of paddles - could be regarded as a binary gearbox, or is that not correct?
  10. Didumos69
    This BrickNerd guy hears the gearbox stuttering, acts a bit strange and skips quickly to his next sentence. He ends up giving it a 5 out of 5 overall. You can hear the stuttering from timestamp 4:09 and from timestamp 4:35.
  11. Didumos69
    I posted this in the Sariel video thread, but I thought it would be valid to post this here too. In Sariel's video the gearbox is clearly suffering from resonance when driven by a motor. You can read this from the rotation speed of several gears which goes up and down with a more or less constant interval. This is not strange given the number of gears involved, but as far as I can judge there is a more important cause to this effect. In real gearboxes most gears have a prime number of teeth, or at least the numbers of teeth of two engaged gears are mutually prime. This takes away most of the resonance risk. It's also why most real gear ratios cannot be expressed in terms of whole numbers only. LEGO gears all have multitudes of 4 teeth, so two engaged gears are never mutually prime. Together with the large amounts of slack and friction - compared to real gearboxes - resonance is far more likely to occur. Maybe we are setting the bar too high when we expect these kind of excessive gear sequences to behave well when being motorized.
  12. Didumos69
    The gearbox in Sariel's video is clearly suffering from resonance when driven by a motor. You can read this from the rotation speed of several gears which goes up and down with a more or less constant interval. This is not strange given the number of gears involved, but as far as I can judge there is a more important cause to this effect. In real gearboxes most gears have a prime number of teeth, or at least the numbers of teeth of two engaged gears are mutually prime. This takes away most of the resonance risk. It's also why most real gear ratios cannot be expressed in terms of whole numbers only. LEGO gears all have multitudes of 4 teeth, so two engaged gears are never mutually prime. Together with the large amounts of slack and friction - compared to real gearboxes - resonance is far more likely to occur. Maybe we are setting the bar too high when we expect these kind of excessive gear sequences to behave well when being motorized.
  13. Didumos69
    I know it's a hard time with all these Porsche topics surfacing, but hey, be a machine and put yourself together
  14. Didumos69
    Sariel, thank you very much for this extensive and informative review!!! One minor detail: On the LEGO Porsche - Sheepo Porsche sheet at the end of the video you state the Sheepo Porsche has negative caster angle and positive camber angle. Shouldn't that be positive caster angle and negative camber angle?
  15. Didumos69
    If you do that you could also do something with longitudinal torsion bars. That works even without shock absorbers. I used this in my Steppenwolf-suspension.
  16. Didumos69
    Sounds good to me. It's more than a pattern; it's a set's life cycle at Eurobricks
  17. Didumos69
    If you decide to lock the speculation topic (good idea in my opinion), will you also rename it to something with "speculation" or "pre-release". People searching the internet might draw early or wrong conclusions based on all speculations.
  18. Didumos69
    The more I come to think about it, the more I get convinced that this should be the way to go. Not a big machine or robot, but a composition of small machines with simple functions. Not Lego, but this seems very promising: http://news.mit.edu/2013/simple-scheme-for-self-assembling-robots-1004
  19. Didumos69
    That will give them time to add errata for the error in the instructions. Given Jim's review, there should be no other problem with the gearbox when just playing with (pushing around) the vehicle. The lockup when driven by a motor is of course a problem, but Jim did not mention too much overall friction in the gearbox.
  20. Didumos69
    I can also order it but it also says 'not in stock'. I think it's not 'in stock' so they have time to add errata instead of having to postpone the release.
  21. Didumos69
    There must be something wrong with your build. Did you make sure all clutch gears have substantial play and all individual axles run smoothly?
  22. Didumos69
    Great review! Thanks a lot!!! All facts are on the table now. Found a small typo while reading. In the Gearbox section of the Summary you end the last sentence with "with touching the rubber bands constantly". I think it should be "without touching the rubber bands constantly". I enjoyed reading it. Good night!
  23. Didumos69

    in constant pursuit

  24. Didumos69
    Sorry, had to make this joke. Killing time until midnight.
  25. Didumos69
    There are more configurations possible, but I think this is the most simple - yet intriguing - self-assembling machine possible. It has been built from a single piece and can put itself together in zero steps. . I wanted to test a real-life version, but I was affraid I would trigger some kind of unstoppable domino-effect That's for the 3rd category, now back to the 2nd category... :wink:
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