Posted April 2, 2024Apr 2 Hi, after some time I am back with new project worth sharing even in WIP state. After building my 8x8 Tatra (that was used for truck trial competition), I started building smaller scale version of it's chassis. It went good, but then I got stuck for approximately half a year with front and rear axles without central section on motor selection and bilding steam airship (see pirate forum for more details) . The chassis was laying under other projects and I slowly started daydreaming about building new and better firetruck. Well, first red brick was placed on the finisged chassis on the end of November 2023. Then during the xmas holiday I built the cab, and then foind out I do not know where to aim this project. I was thinking about firetruck with some kind of bucket arm or crane, or some heavy duty tow truck, but the idea of firetruck with working water gun was still there. So I have scratched sketchy outriggers that needed 3d printed wormgear (other thread direction than the original) and started building basically the airport crash tender without the typical roundy cabin... Well, enough stories. The MOC needs 3 C+ HUBs so far to power all functiobs, 6x6 drive with central diff lock, fully articated front and top watergun arm, and function switch gearbox. I plan to build it with full lights and pybricks control. Even it has more than 2kg so far, it is still a decent offroader. For a wjile was I considering building it all neon yellow, but then I checked the parts availability. Maybe next time. :D More info will come soon. More photos: https://bricksafe.com/pages/horcikdesigns/tatra-chassis-with-rc-firetruck Updates will first appear on my IG profile (horcikdesigns). Front mask with cabin: Mechanical controls of the front water gun (rotation and elevation) With 3d printed custom 7x3(4) frame the worm gear can go through and help rise the arm. Probably will try to use linear actuators in next iteration, as this adds too much friction and stress to bricks. Do you have some ideas how to achieve it? So, what do you think? Does it make sense? :D Edited April 2, 2024Apr 2 by HorcikDesigns
April 2, 2024Apr 2 It for shure makes sense. Like the placement of "battery" boxes. Littlebit worried about that connection of upper part of boom of whatever that is for "sprayer".
April 2, 2024Apr 2 Author @Jurss@Jurss Thanks! Yes, the battery box position is one of the main design parts of the MOC. Shpuld slightly ressemble the hydrogen powered Tatra prototype dumper. Regarding the arm, the place you mention is the one that I like the least and plan to change as soon as I find better solution. In the meantime I have finished side compartment covers.
April 5, 2024Apr 5 @HorcikDesigns, did I spot a 3D-printed connector between your front axle and the portal hub? The little piece that pops onto the portal hub tow ball and appears to connect to the rest of the axle by axle hole?
April 5, 2024Apr 5 Author @Fluwoeb Heh, right. I used 4 pieces of 3d printed ball joint adaptors for the front axle. I saw similar design somewhere on the internet, but did not find the 3D data, so I designed my own version. It is available on my Makerworld.com account, by the way. https://makerworld.com/en/models/86753#profileId-100218
April 5, 2024Apr 5 @HorcikDesigns, thanks for the link to your design! I have a small portfolio of other people's 3D Lego compatible part STL files from Thingiverse.com and Printables.com. I have designed a couple Lego compatible parts of my own, but particularly adapters from RC to Lego for a project I am working on rn.
June 7, 2024Jun 7 Are you going to make instructions, and if so, where will they be? Also, looks great, even in its early stages.
June 12, 2024Jun 12 Wow, this build looks amazing so far. I can't wait to see what it looks like when the rear body panels are finished. I love the red/yellow scheme and the large water cannon on top. It reminds me of my Airport Crash Tender MOC from 2017, but your model looks even bigger. What's the tire/rim combo you're using for the model?
June 13, 2024Jun 13 Author @bruh Well, currently I am not sure whether to scratch this version and start from the scratch with different approach (change the colour, cab, controllers, add differentials, 3rd axle steering, etc. ) or not. So release of Instructions on my Rebrickable.com is very unlikely to happen for this MOC, unfortunatelly. Maybe for the chassis separately, it might work well for Tatra trial trucks. @JLiu15 Thanks! Yes, crash tenders are huge inspiration for this concept, and your MOC is very nice source of inspiration TBH. :) i use 82mm tires for RC trucks (similar in size to tires from Audi E-tron set, but they can withstand more load and are more sticky). ======= Here are two quick update videos from my IG profile - I have to make new set of photos of the current progress on this MOC. https://www.instagram.com/reel/C7y_BFVIi-O/?igsh=MXdvZzI5aHMxeDdjMQ== https://www.instagram.com/reel/C70sJmQojQh/?igsh=Zm1vcGM2dzZ4eDJl Edited June 13, 2024Jun 13 by HorcikDesigns
June 17, 2024Jun 17 Honestly, I think that some of the bodywork (sides, obviously rear, and personally, the angled fenders) could use a rework. However, it is large, and aesthetic details are hard to fabricate well. Good luck!
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