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  1. UltraViolet


    I definitely like how it looks just that little bit more 'grand'. Great respect to all of you guys figuring out all those articulations.
  2. UltraViolet

    DF06 Aposematic (Friends style diesel shunter)

    For anyone looking to build the tank car in this color or an alternate color, the curved slope pieces for the end domes are fairly new and still relatively expensive. If you don't mind visible studs, you can directly substitute the 6x6 dish part at significantly lower cost for most colors. Original part - 8x 76797 - "Slope, Curved 3 x 3 Corner Round" Alternate part - 2x 44375b - "Dish 6 x 6 Inverted (Radar) - Solid Studs", or 2x 44375a - "Dish 6 x 6 Inverted (Radar) - Hollow Studs" for some additional colors. There are a few exceptions where a particular dish color is rare/expensive, but overall it would be a fair substitute for a builder on a budget. It would also provide connection points if you want to modify the design to include an over-the-end style ladder, a vintage end frame brace, or a full wrap-around hand rail.
  3. UltraViolet

    Trains in 4-Wide

    I appreciate any ideas you can bring to the discussion. Undoubtedly there will be a way to make use of this in some form.
  4. UltraViolet

    Lego Powered Up Pocket Book

    This is wonderful! It is absolutely what LEGO should have published themselves. Thank-you for doing this!
  5. UltraViolet

    [MOD] Combining RC with 12v rails

    I don't own a 12V train motor to test with (yet), but I'm wondering if using a slightly softer/squishier wheel tread material would help with the starting traction? I suspect copper tape will only make the slipperiness worse. The wheels in my collection are from the '80s, and the rubber first decayed to rock-hard, then disintegrated, but I don't recall them ever being very supple in the first place. I am planning to experiment with alternative materials, as I need replacements anyway. Does anyone here know what the going wisdom is for suitable replacements?
  6. UltraViolet

    DF06 Aposematic (Friends style diesel shunter)

    I am in the process of ordering the needed pieces to build this, and I have much of it pre-assembled in sections. The Neon Yellow parts of the first I've owned in this color, so it's nice to be adding something new into my collection/pallet. I also got some 44861 plate 1x2 with clip in Dark Pink to see if I can do anything with the door pieces. My plan at the moment is to probably build this loco with a 9V motor and put a couple of weight bricks in place of the battery box for increased traction. I presume you have MOC'ed all the little freight wagons also. The purple tanker is calling my name, if you can point me in the right direction on the key parts used. I think it would be fantastic to have a captive industrial switching layout with some of these, possibly in more than one color. I just noticed also, that truck cab near the base of the crane in the video looks great. I'll probably build one of those too.
  7. UltraViolet

    DF06 Aposematic (Friends style diesel shunter)

    I really like the hood profiling on that one!
  8. UltraViolet

    DF06 Aposematic (Friends style diesel shunter)

    I have three 60800 pieces in Dark Pink. They look kind of like engine access doors. I'm going to see if I can incorporate them into my build to add some detail.
  9. UltraViolet

    DF06 Aposematic (Friends style diesel shunter)

    Normally I wouldn't build stuff like this, but it looks great and so 'fun-sized' that I really am tempted to!
  10. UltraViolet

    [MOC] Medway 4703 "Maria"- Siemens Eurosprinter

    I think I like the model more that the prototype! Very nice.
  11. UltraViolet

    Roller Coaster Thread

    Chicago Screws were invented in Chicago by the Chicago Screw Company in 1872. Sounds simple enough, but it seems to have really just been a nickname it picked up because of that. They acquired many other names over the years, such as Chicago Fasteners, Chicago Bolts, Screw Post, Binding Post (books), Tee Nuts, and one I'd never heard of until now, Sex Bolts. Perhaps we should not attempt to translate that into German! (I learned of these fasteners first from a workshop I used to be employed by which had a section dedicated to leatherworking. Perhaps this does not help distance myself from that latter term... )
  12. UltraViolet

    Roller Coaster Thread

    You got me thinking, sorta on a related note.- it would be really great if there was something like a Chicago Screw for Technic, especially if the heads were machined to fit flush in the recessed holes of the beams and any other parts with Technic holes. I presume no one has ever made such a thing. It would be akin to the old threaded axles and nut-bushings (3705b/3737b/4698). (Which reminds me that I really should buy some of those, as I've never owned or tried any, but I'm sure they can be extremely useful.)
  13. UltraViolet

    [MOC] Dublin Luas - Alstom Citadis tram

    Great illustration! I'm definitely not a fan of this format of tram, as there are many compromises that have to be made just for the sake of achieving 100% low-floor,. I do, however, have a great appreciation for the engineering that goes into making it work, and it's all very interesting.
  14. UltraViolet

    [MOC] Dublin Luas - Alstom Citadis tram

    It is a delicious irony that the cited example, the 1st-gen Siemens Combino, infamously tore its articulation frames and body structure apart: https://en.wikipedia.org/wiki/Siemens_Combino "On March 12, 2004, Siemens admitted to problems concerning the stability of the car bodies and, as a precautionary measure, instructed all public transportation services to take all Combinos with a service distance of more than 120,000 kilometres (74,565 mi) out of service. Torsion forces generated in S-curves were much higher than anticipated, leading to cracks around the articulations between the car modules. Subsequently, hairline cracks were found in the joints of the aluminium bodies, which could cause the roof to collapse in the case of an accident." Of course I say this in good-natured jest, as I'm not disputing your technical assessment - I just find it funny that the illustrative example chosen had such horrible design flaws. I've had the opportunity to visit Amsterdam and to ride these cars myself. The elastic oscillating whiplash they exhibit when navigating turns at speed has to been experienced to be believed. Much of this is was a result of the stiff rubber-cone-bushing mounting system for the bogies, though this dynamic behavior is a common issue to many trams of this segmented design. Multi-segmented articulation is quite the interesting and complex engineering topic. On the Bombardier Flexity 5-segment vehicle I have been building in LEGO, I had to face significant challenges in making it both flexible and rigid enough to function. I decided it was easier to rigidly mount the motor bogies than to have movement in both the bogie mounts and the articulations. This required full flexibility at every articulation joint while still maintaining balance and level body segment alignment. Such is the nature of the game when 'approximating' complex engineered systems in coarse, simplified LEGO at reasonable scale. My next project is thankfully a two-segment, single articulation light rail model - so much easier! So far, all my headaches on that build have been limited to pure 'cosmetics'.
  15. Huge kudos to you for presenting this in a way that should allow just about anyone to get over the knowledge or fear barrier of using this (or PyBricks in general). It is such a relief to see this project still in development, so much thanks again also to the rest of you guys working on the coding! I'm wondering if it's possible to add another parameter to the code. One of my build applications is single-ended trams. Under normal circumstances, no 'driver' should ever be permitted to move in the reverse direction. Is there a way to provide a hard code flag that could enable/disable reverse direction (even if two motors set opposite are connected)? Alternatively, or in addition to this, can an additional parameter be provided where a separate maximum speed level can be set for each direction, so by this I could at least heavily limit the reverse speed? These parameters would help me 'get over the fear barrier' of handing the remote to my young nephews or to anyone at a show, as otherwise someone's quickly going to do a lot of damage no matter what I try to tell them.