faph Posted December 19, 2023 I have recently acquired Cargo Train 60198, which is a great set. I figured out it could do with a shunter, so I started designing one. The main things I am after are: Something small With accurate and releastic speeds (slow!) and acceleration (slow!) Playable and not too difficult to build So the following is largely inspired by other topics, including: There it goes: Unfortunately, the Powered Up motor takes up too much space for the driver to sit inside the cab, but at least they can hang out from the door! Designed largely around placement of motor + battery box like this, giving it the same overall length and wheelbase I think of Shunter 7760. Share this post Link to post Share on other sites
faph Posted December 19, 2023 (edited) (image removed) Edited December 19, 2023 by faph Bad image Share this post Link to post Share on other sites
zephyr1934 Posted December 19, 2023 Nice work, I don't think you can get any smaller than that while keeping it all Lego Share this post Link to post Share on other sites
idlemarvel Posted December 19, 2023 Very nice. I wonder why you didn’t use the train motor? Share this post Link to post Share on other sites
Hod Carrier Posted December 20, 2023 34 minutes ago, idlemarvel said: Very nice. I wonder why you didn’t use the train motor? Because a shunter needs to be slooooow. Shunting is all about low down grunt, controllability and precision. She's a lovely little loco. Nice and compact just like a real shunter, and should have good pulling power. Share this post Link to post Share on other sites
faph Posted December 20, 2023 Thanks! Yes the Powered Up motor can be run in “speed” mode rather than “power” allowing for much finer control. Share this post Link to post Share on other sites
Feuer Zug Posted December 20, 2023 Nice small industrial shunter. Good trick on the louvered panel brackets. Share this post Link to post Share on other sites
faph Posted December 20, 2023 (edited) Yeah, that’s a trick that some others (@Toxic43 @BrickPirate) have done before me. Edited December 20, 2023 by faph ref users Share this post Link to post Share on other sites
Toxic43 Posted December 22, 2023 @faph Love it! Another great shunter! The colour scheme goes so well with 60198. If you use PyBricks for the hub software, you can get this thing to go really slow. It's beautiful! Share this post Link to post Share on other sites
faph Posted December 22, 2023 (edited) Thanks! Yes the colour scheme is intentionally matching with set 60198. I understand the Lego PoweredUp app would also allow "speed" mode for motors that support it? Not sure if you would be able to then upload that programme to the hub though so I can use the Lego remote control. Seems PyBricks does support that. I like it that PyBricks also allows you to set the maximum acceleration directly. Edited December 22, 2023 by faph Share this post Link to post Share on other sites
faph Posted January 3 (edited) Small version: Motor and battery are in the same place. The only issue is the cable will be difficult to feed under the front windows... Edited January 3 by faph Share this post Link to post Share on other sites
Toxic43 Posted January 3 I like the idea of being able to get the roof down lower. You'll have seen how tall mine is. I might just have to borrow some of your ideas here and redesign mine to be a bit lower! Rear cab FTW! Share this post Link to post Share on other sites
faph Posted January 3 Yeah, in my blue iteration I let the hight be dictated by the door which I lowered by 2 plates. I want a real door even though the inside of the cab might not be functional. Share this post Link to post Share on other sites
faph Posted January 5 1 to 1 based on @Toxic43’s experience. Share this post Link to post Share on other sites
ejayb Posted January 6 I think he is using 12t bevels and only drives the front axle. It looks like you’re using 12t-16t, but only supported on end of the axles? Then I assume another 12t at the bottom? Share this post Link to post Share on other sites
faph Posted January 6 (edited) Let me get a rendering of the drive later. It’s 12:16:12, so 1:1. Driving both axles. I believe this is what @Toxic43 ended up using in a later iteration. Edited January 6 by faph Share this post Link to post Share on other sites
ejayb Posted January 6 Thanks Faph, I'm trying to gear down my Boost motor loco. I'm waiting for parts to arrive but I'm trying out some different configurations in Stud.io. I'm assumed the gears need to be supported from both ends to stop them slipping. Share this post Link to post Share on other sites
faph Posted January 7 @ejayb This is what it looks like: Share this post Link to post Share on other sites
ejayb Posted January 8 Thank you. You have no problem with the top gear meshing? Share this post Link to post Share on other sites
Toxic43 Posted January 8 3 hours ago, ejayb said: Thank you. You have no problem with the top gear meshing? I didn't, and my drivetrain is set up exactly like this. I haven't had any issues with the mesh or the motor separating from mounting etc. It is also capable of pulling quite a bit. I ended up having to add weight to mine because it ran out of grip due to the low weight over only 4 wheels. Share this post Link to post Share on other sites
ejayb Posted January 8 That's good to hear, I just need to wait for my parts to arrive now :D Share this post Link to post Share on other sites
faph Posted January 8 5 hours ago, Toxic43 said: I ended up having to add weight to mine because it ran out of grip due to the low weight over only 4 wheels Good to know! I’d hoped the batteries and the motor would do the trick. Share this post Link to post Share on other sites
Darkkostas25 Posted January 8 We need more cute buff shunters! Love it! Share this post Link to post Share on other sites