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About JLiu15

  • Birthday 12/01/2000

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  1. Thanks! Some parts I feel could've been better (e.g. the gaps around the headlights and the headlights being too small) but ultimately it's Lego and Lego has its limitations.
  2. UPDATE 4/3/21 At this point, the chassis and mechanical features of the model are essentially finished and I'm ready to move onto the bodywork. I've gotten a lot of work done on the front portion of the model since the last update, with the front roof support and motor for the front door mechanism in place. I've also gotten started on the bodywork a little bit - the front end and the bumper are built now. Overall, the mechanisms all work pretty well. The doors sometimes might not open fully due to backlash in the mechanism, but it's pretty negligible. The front panel of the front door was a struggle, as on the real New Flyer Xcelsior it's curved a little bit at the top. I ended up using a 4L 3mm hose and bent it a little bit before putting it in as they are pretty stiff. As for the front end, the use of System pieces gives it a clean finish, but a drawback is that there are some gaps around the headlights which sit at an angle to follow the curve of the front end. Another drawback is that the headlights are kind of small. However, there are not that many trans-clear pieces available to model the complex curve of the Xcelsior's headlights and have them sit properly angled. Using trans-clear plates and tiles and cheese slopes could have made it bigger, but it would not be as smooth and clean as my solution. If you guys have any suggestions for me, please let me know. Photos:
  3. UPDATE 3/18/21 I've rebuilt the rear roof support and redesigned the rear door mechanism to include 2 mini LAs. The previous design with a single LA had significant backlash that often prevented the doors from opening completely, especially the rear panel. Now with 2 LAs it works much better. It isn't perfect and there's still a slight difference between the two panels, but it's not too noticeable and should be better once the bodywork is installed (right now I think it's because the front panel is closer to a vertical support beam, reducing friction on that side hence why it opens slightly better). @Aleh my model will include a bike rack, although it will most likely be removable. This is because not all of the fleet have them, so I can achieve both looks by having the bike rack be removable. Most of Hilton's and Big Tree's units, which serve Newark-area routes, have a bike rack, while Fairview's and Meadowlands's don't as they serve routes to NYC and bike racks are not allowed inside the Port Authority Bus Terminal. If you guys have any suggestions for me, please let me know. Photo:
  4. JLiu15

    Eurobricker's share your trucks!!!!

    Kenworth T600. Built at the same scale as the Mack Anthem. It can theoretically tow the Mack Anthem's trailer and vice versa.
  5. Thanks! I've actually got an accordion prototype all worked out, it's just a tiny cross section but it works flawlessly. I might put a pic of it in the next update or something, as it's gonna be a while before the accordion part is fully installed on the model (the bodywork needs to be built first).
  6. UPDATE 3/15/21 I've made a good amount of progress on the model over the last month. The driver's seat and steering wheel are in place. The support structure for the front end is partially there - I'm taking advantage of the new 15L beam with alternating holes to reinforce it. The gray beams to support the bellows are now gone - they will be entirely supported by the body. The rear section was also given a major redesign where I lowered the 11x15 frame to make the floor "lower" and so that the front section will be above the rear at the articulation joint where they meet at the turntable. Note that I've left the wheels off for now for easier building. The biggest change since the last update is the rear roof support - this section contains the motor and mechanism for the rear door, which is powered by a PF M motor and uses a mini LA, just like the front. Pillars in the chassis support this section and provide vertical bracing that the bodywork alone can't provide. There's a second turntable to further support the articulation joint, and there will be a roof support for the front section of the model as well - I'll likely show that in the next update. I had some struggle with the rear door mechanism at first - due to friction, the rear panel would not open all the way. It took some trial and error, but I was able to get it to work pretty well, and it should be even better when the bodywork is added as right now the roof support structure is sagging a little bit due to the lack of vertical support right now. If you guys have any suggestions for me, please let me know. Photo:
  7. JLiu15

    42131 - CAT D11T Bulldozer

    You don’t even need to connect to the ball joints to anything. The sides connected to beams will provide sufficient reinforcement.
  8. JLiu15

    [RUMORS] 6x6 Mercedes Zetros

    I think he means the LEGO sets, and yes - I’m guessing TLG has already been developing the Zetros set when the Osprey incident happened
  9. UPDATE 2/6/21 Lots of progress here. The entire front section of the chassis is complete, with all seats (except the driver's) in place. The second axle has dual wheels but is undriven, just like the real bus, and the front wheels are steered by a PF servo motor. In front of the front axle, the front door opening mechanism is integrated into the floor, with an axle connection for the motor which will be placed in the roof. The doors are opened using a mini LA geared 1:4.632. Note that the door opening mechanism for the rear door will be identical, but placed in the roof instead. The good news is that everything worked as intended. The model drove very smoothly when I tested it, and nothing was too weak or strained. I was initially anticipating having to make some changes due to having only built the model digitally, so this was a pleasant surprise. At this point I'm planning on controlling the model with SBrick, as having proportional control of drive and steering will be really useful for things like backing up. Photo:
  10. Thanks! I'll probably play around with my Stud.io model to see if it will work well with the seats.
  11. So with the announcement of the 42129 Zetros set, many have been wondering what functions it may have, with some suggesting we may see a 8043-style gearbox to use a single Control+ hub with its 4 ports to power more than 4 functions. I've seen some people suggest that the motors for drive, steering, etc will be connected to a gearbox that can power other functions (e.g. a crane), as well as remote-controlled pneumatics where motors can switch between driving/steering and controlling valves. However, I see a critical flaw in such a system that will make return-to center functions (e.g. steering, valves) very difficult to implement. This would be quite a letdown, especially given that it would defeat the purpose of C+ allowing for servo control. The first issue is that there's a gap between the teeth on the driving ring and those on the clutch gear. This means there will be some backlash where the driving ring meets the clutch gear, and while it's usually negligible, it won't be good for a return-to-center servo mechanism where precision needs to be very high. In a return-to-center steering or valve mechanism, the "center" that the mechanism returns to will be thrown off by the clutch gear's position relative to the driving ring at the moment they engaged. This might not be as big of a deal for valves, but it will be disastrous for steering as even a small degree of error in the steering mechanism will throw off the direction the vehicle's driving in. Additionally, trying to calibrate the motor would be a nightmare in this scenario. To eliminate the driving ring backlash issue, we could use a gearbox where a set of gears placed along an axle that slides back and forth engages various gears placed around it. This mechanism has not been used by LEGO since the driving rings were introduced (I believe one of the Car Chassis sets had such a gearbox), so it would be interesting to see it return. While backlash would not be an issue here, the concern here is that you need to make sure the gears line up at the right orientation every time the gearbox shifts (this applies for the driving ring gearbox as well). The mechanisms would ideally also have to return to center and lock themselves when the function is disengaged as well, as otherwise the return-to-center position would be thrown off when it reengages. This would be quite a challenging mechanism to implement. And even if everything were to go well, you always lose some precision with each pair of gears in the gear train as every pair of gears will have some play in them, not to mention adding friction to the mechanism which will make it harder for the motor to do its job. Now we never know what LEGO may come up with, and maybe they'll introduce a never-before-seen mechanism and/or parts that will make this work flawlessly. Maybe that's what justifies the high price for this set despite having just over 2000 pieces. I'd certainly love for that to happen, as it would mean being able to precisely control a 4W/crab/normal steering system or several return-to-center pneumatic valves without the need for multiple servo motors. Thoughts?
  12. UPDATE 1/28/21 After putting the seats on yesterday I felt like the rear wheels were a little too close to each other, i.e. when the bodywork is in place they'll be too "recessed" into the body, especially with the wheel arches that stick out from the body a little. I noticed that the middle and rear axles' wheels are a little more outward than the front wheels on the real thing. Because there was plenty of space, I decided to go with dual wheels on the middle and rear axles to make it more realistic. I had to modify the chassis a little to make them fit, but I think it turned out pretty well. Photo:
  13. UPDATE 1/27/21 BrickLink order arrived today, so all 31 seats in the rear section are now installed. Photo:
  14. Thanks! Fun fact: NJ Transit is the 3rd largest transit system in the US
  15. Thanks! Definitely looking forward to this one