JLiu15

Eurobricks Citizen
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About JLiu15

  • Birthday 12/01/2000

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  • What is favorite LEGO theme? (we need this info to prevent spam)
    Technic
  • Which LEGO set did you recently purchase or build?
    42099

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  • Gender
    Male
  • Location
    Verona, NJ

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  • Country
    USA

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  1. Hey guys, I'm a beginner to digital building, and I'm trying to make one of my recent MOCs in stud.io and make instructions for it. However, I'm not sure how to model a structure that has plenty of connections at non-right angles. I know you can rotate a piece or a structure 90 degrees using the arrow keys or rotate it about an axis for a given number of degrees, but solving for the exact angle those connections are at would take A LOT of complex trigonometry. Even then, the angles won't be 100% precise. I've taken a look at some tutorials and played around with the controls, but I haven't figured out how to connect pieces at the angle they'd sit at when connected in real life. So far I've used the "connect" feature to precisely put pins, etc into the right pin holes, but that didn't seem to work for connecting pieces at their "natural" angle. I did some trial and error by putting in values that seem to make things connect, but of course that's nowhere as accurate as their real-life angles. For context, this is a suspension setup I'm working on. The suspension is a simple sprung one like 42075's rear suspension, but the left and right wheels are suspended independently. This means there are 3 unknown angles - the point at which the shock absorber connects to the chassis, where the shock absorber connects to the suspended section, and where the suspended section is connected to the chassis. If necessary, I can also provide a screenshot of my work so far. I've always been intimidated by digital building, so I've never really made any efforts to learn it. But this time I'm finally making it a goal to build an entire MOC digitally and make instructions for it, so any help from stud.io (or other digital building software) experts will be greatly appreciated.
  2. JLiu15

    [WIP] Azure Racer XL

    Yes - that's why I decided to use them for this MOC. For such a fast MOC you gotta make sure everything is sturdy and that there's no weak points. I think you're spot on with this - we learned about this in my physics class last year (I'm currently a second year engineering student) and using physics terminology explains it really well.
  3. JLiu15

    [WIP] Azure Racer XL

    @Erik Leppen that makes sense - looks like just another example of trading force for distance (e.g. levers, pulleys, gear ratios, etc.) @Bluehose the front hubs are these and the rear hubs are these; most sets released between 2013-2015 should include a pair of both (e.g. 42000, 42029, 42037, 42039). However, I've replaced the rear ones with portal hubs in my most recent update.
  4. JLiu15

    [WIP] Azure Racer XL

    UPDATE 11/27/20 I've reworked the chassis a little bit. The RC motors in the previous design were incapable of moving the model as they had so little torque. I've redesigned it to be driven via the inner outputs through a 3:1 reduction in portal hubs. The motors now have a much better speed/torque balance - it has enough torque to move it without struggling in my tests with a PF AA battery box (so it should improve when I use BuWizz in fast or ludicrous) but not geared down so much that its speed is essentially that of an L motor. The front suspension has also been modified. The suspension arms have been reduced to 6L as I really didn't like my solution for 7L tie rods. The suspension travel is comparable to before, but I did notice that the shock absorbers don't compress all the way. Honestly I'm okay with that given how much travel it has. If you have any suggestions for me, please let me know. Photos:
  5. JLiu15

    [WIP] Azure Racer XL

    UPDATE 11/26/20 (2) As @amorti noted, the original front suspension design would suffer from bump steer due to the steering link being shorter than the suspension arms. I've reworked the front suspension to make the steering linkages the same length as the suspension arms (7L) by combining two of part 15459. I tried combining it with part 57515 by placing it in its bifurcated part, but that resulted in at least an 8 stud steering linkage. I'm wondering if this will be a better solution that eliminates bump steer - I think I've seen a MOC before using this solution, but I don't remember. Photo:
  6. JLiu15

    [MOC] Tracked Loader

    Thanks! Yeah the Technic bricks topped with tiles worked out pretty well. Yes haha - I had to do a lot of trial and error with the bucket's linkage.
  7. JLiu15

    [WIP] Azure Racer XL

    So the steering links should ideally be the same length as the suspension arms? I haven't noticed any issues with bump steer - is this when the suspension goes up that the wheels turn themselves? I'm guessing it's probably negligible in this situation. Also the suspension seems soft enough as it is. It's not too stiff, but also not so soft that the model will start to sag.
  8. JLiu15

    [WIP] Azure Racer XL

    I think those might be too big. Also not very buggy-like. I am planning to make a similar MOC using those wheels soon though.
  9. JLiu15

    [MOC] Tracked Loader

    Yup, in fact there is a LEGO set (well, a B-model of one) version of such a vehicle - the 8043 B-model. Thanks! I finally got a backdrop. Now I can take photos on a white background
  10. JLiu15

    [WIP] Azure Racer XL

    UPDATE 11/26/20 I got some more work done on it last night after posting this topic, and now the chassis is essentially complete. I've changed the front suspension to use double shocks per wheel and the rear to use 6.5L hard shocks. Contrary to what I originally believed, the front and rear suspensions proved to be roughly equally hard and offer similar travel. The front suspension was VERY soft with just one shock per wheel. I think this is a model I can finish in a matter of days, and get maximum fun out of driving it. Right now it's super lightweight, and I don't anticipate the bodywork and BuWizz (which should arrive tomorrow) to add too much weight. If you have any suggestions for me, please let me know. Photos:
  11. JLiu15

    [WIP] Azure Racer XL

    Yup! I sure bet it will 😉
  12. Some of you may remember my Azure Racer from a few years ago. It was a small simple buggy that was meant to be a leisurely build after my BrickFair VA projects of that summer. It had only one L motor for drive, but had decent speed. This model will be a sequel to that - it'll be larger (with Unimog tires), dark azure instead of medium azure, and powered by BuWizz and driven by 2 RC motors. In fact, this will be my first MOC to use BuWizz and RC motors - something I wanted to get for years and finally obtained two of them. The front axle will be a double wishbone independent suspension using shocks from the 9398 set. I haven't used them in years, and it's nice to bring them back again. The rear suspension will also be independent, but it'll be the RC motors themselves that are part of the suspension. Each motor will be connected to one wheel that'll be mounted on its own pivot point and shock absorber, essentially creating an independent suspension. I'm really looking forward to building this model. With the BuWizz on ludicrous or fast powering 2 RC motors driving a relatively lightweight model, I anticipate getting A LOT of speed out of this thing. Photo:
  13. JLiu15

    [MOC] Tracked Loader

    Thanks! And I see - I guess I could've used more Technic bricks topped with tiles in lieu of liftarms on the arm.
  14. JLiu15

    [MOC] Tracked Loader

    Thanks! I had to rework the bucket linkage a couple times - the range was poor and unrealistic at first (you can see in my WIP topic) but I managed to get a much more realistic range. Overall I'm pretty happy with it. Yes, I too prefer a little more color sometimes - otherwise it looks bland and monotonous to me. And yes, the bucket is from the 42030 and 42081 sets (I got it off Bricklink).
  15. A simple tracked loader model with Control+. Features subtractor drive, arm elevation, bucket tilt, and lighting by Brickstuff. Functions/features: Subtractor drive Arm elevation Bucket tilt Lights (Brickstuff LEDs) Photos: Video: