JLiu15

Eurobricks Citizen
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About JLiu15

  • Birthday 12/01/2000

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    Technic

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  • Gender
    Male
  • Location
    New Jersey

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    USA

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  1. JLiu15

    [MOC] Grapple Truck I6

    Because it's easier to just rotate it by hand at the angle I was recording it from, as the lever is on the other side. It's also kinda fast so it's hard to land it directly above the apple. I motorized rotation only because nearly every advanced Technic set with a crane arm has it, and it seemed kinda stupid just to leave it out. Honestly, this reminds me of the 42054 where every motorized function could be operated manually. Two of them were turntable-based (similar to here) and one was a mini LA which is easily extendable/retractable by hand. I didn't bother to turn on the battery box when swinging the arm when my hand is much more precise.
  2. JLiu15

    [MOC] Grapple Truck I6

    I overlooked the space issue and it was all filled in with mechanisms by the time I realized! I didn’t feel like making the gearbox more complex either. IMO it’s much more important to motorize tipping than outriggers.
  3. JLiu15

    [MOC] Grapple Truck I6

    There didn't seem to be any functional issues with it, although I do feel I could have concealed some parts of it better. Haha I was thinking of that when building it!
  4. It's been a while since I finished this MOC. I've been super busy the past month so I never had a chance to film it, but I had some time recently to get it posted. Anyways, it's a truck model with a fully functional crane arm and rear dump, and features a distribution gearbox that controls 4 motorized functions. There are also a variety of manual functions that complement them to give this model plenty of functionality. This project started off with connections to my CLAAS Challenger 95E in its WIP stages. I spent an entire day working on a crane and grabber attachment with a compact directional gearbox that would be connected to a PTO when finished, but I completely overestimated the size of the resulting crane. It ended up being so large and out of proportion that I had no choice but to abandon the crane. It felt like too much work to get rid of, so I decided to create an entirely new MOC just for the crane. I immediately knew that this model will be that of a grapple truck, as the design of the crane is optimal for such a model. The weeks leading up to BrickFair I worked on a distribution gearbox that would serve 4 function - 3 of them are already on the crane (boom elevation, 2nd section, and rotation) but the 4th function I was unsure of. I played around with various outrigger mechanisms but realized the bottom of the crane is too filled in for any additional mechanism, so I attached the 4th function to tipping the bed. The tipping bed can be removed by pulling out 4 pins and can handle plenty of load. In fact, the motor does not even struggle to unload objects such as a book. I initially thought of making the rear in the style of a logging truck but thought that would be too similar to the 9397, so I went with a tipping bed. The entire gearbox is driven by a PF L motor slightly behind the front axle. Behind the gearbox sits the two rear axles, with double wheels connected by hubs. A long driveshaft runs parallel to the chassis up to the front where it drives a I6 engine, hence the name. Because the driving rings are located at an inconvenient location for shifting, I ran linkages through the chassis that connect the changeover catches to control levers by the outriggers. Since the outriggers are manually deployed it essentially formed a control area behind the front axle, with the outrigger knobs and gearbox control levers placed conveniently next to each other. The driveshaft connects to the piston engine in its front, as there is not enough space in the back of it to run gears up to. I initially decided to model this after a real truck which is why I used a 6-cylinder, but timing issues made me scratch that idea. The front section of the model was the most challenging part, requiring several rebuilds to get everything working right. Due to the weight distribution the model bends where the crane sits, and even in the final design it still bends a bit, although not noticeably. The steering mechanism was also challenging to get right. Since the piston engine sits right in the middle of the HoG steering's path I used a linkage mechanism that drives two levers in opposite directions which connect to the front hubs via links. The left and right hubs are still synchronized with a beam to ensure they don't turn at unequal angles when one side isn't cooperating. Turning the steering knob takes some force, but there isn't any noticeable play in the mechanism. Aesthetically the front section featured a simple bumper with LED lights that turn on when the motor is running and a cab that tilts forward to reveal the engine. Although this model had many aspects kept simple, it was a fun building experience for me and it was easier to manage than a model full of motors and remote controlled features. This model demonstrated that even simple elements can add up to a realistic-looking model with superb functionality. Video: Photos:
  5. JLiu15

    [WIP] Grapple Truck I6

    You could have clicked on one of my WIP pics and that would have taken you to my Flickr... I also have all my links in the description of all my recent YouTube videos, so I don’t think I have to link it here again.
  6. JLiu15

    [WIP] Grapple Truck I6

    Yeah I kinda BS the cab. The functions are really nice though, so good playability. Also the rear dump mechanism can handle extreme loads with no problem. In the upcoming video I might even do a gym scene with weights tests if I can
  7. JLiu15

    [WIP] Grapple Truck I6

    Yeah, I wasn’t intending to put them here. I’m waiting till I make the MOC topic and I’ll have them embedded in there. I took the pictures today so I decided to upload them now rather than wait till the MOC topic.
  8. JLiu15

    [WIP] Grapple Truck I6

    UPDATE 9/15/18 The Grapple Truck I6 has been completed! It was mostly a plan-as-you-build MOC, but in the end everything combined nicely and the functions are phenomenal. There were definitely some "rough patches" in the building process, especially as I was creating front section of the chassis where I was trying to get the steering to work smoothly and reduce bending on the chassis. At that point I basically came to the "just get this over with" stage, but as I finished everything off the bending became less noticeable. The highlight of this project is the functions - all motorized and manual functions work very smoothly and make the MOC very playable. I will try to get it filmed and uploaded in the coming weeks. Meanwhile, you can check out photos of the finished project on my Flickr.
  9. 5: 10 3: 6 1: 4 10: 3 12: 2 6: 1
  10. JLiu15

    [WIP] Grapple Truck I6

    Yup! The aesthetic of this MOC may not be the best, but all the functions work phenomenally and I expect it to be a very playable MOC.
  11. JLiu15

    [WIP] Grapple Truck I6

    UPDATE 9/8/18 The MOC is about 85% complete. The only thing I have left to do now is the cab, so this will be the last update before I publish the MOC. Since the previous update the rest of the chassis has been finished, with battery box, steering system, and fake engine all in place. I've also modified the boom a bit - I've changed the angle of the mini LA controlling the second part of the boom so that its maximum angle is 180 degrees. I've also added rubber grips to the claw, since large objects often slip out. I have to say, though, that the building process between now and the last update was overwhelmingly discouraging. Even as I tried to make the chassis as reinforced as possible it still bends. It's not too noticeable but it made it very hard for me to stay motivated on the build. I also had a hard time bracing the battery box and routing the steering mechanism around it. The I6 engine takes up a lot of space, extending beneath the battery box which meant the vertical axle for the HoG steering has to work off center. The final steering mechanism is linkage-based, with two links working in opposite directions to steer the wheels. There's still a beam which connects the wheel hubs to ensure the wheels remain parallel at all times. HoG steering is controlled by turning the warning beacon. I originally used a I6 instead of a straight-4 because I planned to make the cab a Volvo FM. However, since I'm starting to get busy with school and college apps I'm taking a step back on this project. I'll just make a simple cab that can be tilted to expose the engine. I also changed the name of the project to "Grapple Truck I6" referencing the engine, as simply calling it "Grapple Truck" seems kinda boring to me I plan to get it finished and filmed this month as next month I will be moving. After this MOC I will focus mainly on smaller projects until next year, as I do not have as much free time anymore. If you guys have any suggestions for me, please let me know Photos:
  12. JLiu15

    [WIP] Grapple Truck I6

    UPDATE 8/31/18 Well not everything has gone as planned. As I got into building the front section of the chassis I got into a ton of issues - mainly structural. The steering linkages were a major issue - the space they took up meant no room for vertical reinforcement in that entire area. I've put so many things in there that the entire design became too troublesome to continue working with, so I decided to just chill out and take a step back. I've realized this entire time that this model is just begging to be built into a cab-over. With the current proportions building it into a longnose just does not seem right. The looks of it right now seem to best fit trucks such as the Volvo FM, which gives me a change of ideas: Instead of a red US-style truck I will be modeling the Volvo FM 13, probably in yellow since I have a good amount of yellow System pieces from the Caterham set. Such a design seems to work much better with what I've got so far. As for what I've done in this update, most of it's enhancements to what I already have. I know not everyone is a fan of stickers, but I kinda got carried away here and added various stickers to it. I've upgraded the rear wheel arches with System pieces, which look more realistic and follows the recent trend with Technic increasingly using System pieces. I also added whatever those side things are - the pairs of black beams attached to the sides of the chassis. I modified the outriggers' linkage a bit to make them extend farther and fold up nicer. Last but not least, a pretty small feature I added is a chain that prevents the rear gate from opening too far (and subsequently flipping over into the dump bed). If you guys have any suggestions for me, please let me know Photos:
  13. In the video you can see that the interior has lots of 5x11 panels (part 64782) in the tan color. This part has never been released in this color before, so is there a chance this “unreleased” color version starts circulating on bricklink once this model is taken apart? Or is this a sign that a future set is coming with this part in tan?
  14. JLiu15

    [WIP] Grapple Truck I6

    True. It is quite expensive and I hesitated from getting it until last fall. Finished chassis should be coming in the next update. The entire steering mechanism and fake engine should all be in place by then.
  15. JLiu15

    [WIP] Grapple Truck I6

    Honestly, I kinda want it to fit "Lego Standards" I generally consider weight distribution for RC MOCs that simply need the battery box flipped on - in fact, I seldom use the AA battery box on RC MOCs but instead use the rechargeable battery. It's smaller, lighter, and is rechargeable of course. But here since the gearbox switches between functions instead of directions, I want the battery box at a convenient location so it can be flipped easily.