crazy technic Posted January 11 Posted January 11 (edited) Introduction: For the [TC30] contest, I am presenting a 1:21 scale construction fleet consisting of a Bobcat T76 Compact Track Loader and a Takeuchi TCR50-3 Tracked Dumper. Both models are built in a matching Red and White livery to represent a unified site fleet. My goal for this duo is "Mechanical Density"—packing as many realistic, non-motorized functions as possible into a 13-stud wide footprint. Machine 1: Bobcat T76 (Completed) Engine: ultra compact Transverse-mounted Inline 4-cylinder engine (Doosan D24) linked to the tracks. Lift Path: Accurate vertical lift path using a 4-bar linkage. Dimensions: 11 studs wide, staying under the 300g limit. still needs a bucket and some more attachments and details Machine 2: Takeuchi TCR50-3 (Work in Progress) The TCR50-3 is the 2025 evolution of Takeuchi's dumper. It presents a unique mechanical challenge due to its offset cab and side-mounted engine. Current Progress & Functions: Mechanical 2-Speed Gearbox: I have successfully integrated a functional gear selector inside the cab. This allows the user to switch between the gears. Tracks-to-Engine Drive: The model is non-motorized; pushing the model on its tracks drives a longitudinal Inline 4-cylinder engine located in the right-side hood. 180° Swivel & Tip: The dump body (skip) is built to 1:21 scale (11x16 studs). will be mounted on a turntable to allow side-dumping. Stay tuned for more updates! more model pictures coming Edited January 14 by crazy technic (changed topic name) Quote
Timewhatistime Posted January 11 Posted January 11 1 hour ago, crazy technic said: Stay tuned for more updates! more model pictures coming Up to now, there isn't a single model picture... just some high-aimed plans which will have to be proved and accomplished within the restrictions of [TC30]... Quote
crazy technic Posted January 11 Author Posted January 11 I woundn't say just high aimed plans, when I posted this I already had the skidsteer almost done, and the crawler dump truck chassis is also pretty much done. I just didn't have the time to make the picture yet Quote
Jurss Posted January 11 Posted January 11 3 hours ago, crazy technic said: I woundn't say just high aimed plans, when I p from rules - A discussion topic needs to show some actual progress (i.e. pictures of the build in progress) and should not be used to "reserve an idea". Quote
crazy technic Posted January 14 Author Posted January 14 here is some more progress, I changed the 2 speed gearbox and drive train, and managed to get the shifter in the cabin, as well as finishing the turning mechanism and dumping mechanism (btw sorry for bad pictures, its from my laptop webcam since I have lost my phone) Quote
crazy technic Posted January 19 Author Posted January 19 here is the finished tracked dump truck I had to optimize the parts like crazy since when I thought it was done it was 330g without tracks, i have since gotten the weight down to 299g to be under the limit. I have also decided to re do the skid steer since it looked tiny next to it, now it looks a bit more the right size but is not fully finished yet, more pictures coming Quote
Thirdwigg Posted January 19 Posted January 19 Looks good, and good job getting it down to 299g. That must have been difficult when you were at 330 without the tracks. Quote
crazy technic Posted January 19 Author Posted January 19 7 minutes ago, Thirdwigg said: Looks good, and good job getting it down to 299g. That must have been difficult when you were at 330 without the tracks. defenetly, the frame on the bottom is pretty much empty now while keeping all the features the same. Quote
crazy technic Posted January 22 Author Posted January 22 the skidsteer looked just too small next to the tracked dumper so since I had enough weight budget left on that one I decided to make it bigger and made it wider and higher they are both almost ready, the skid steer needs some more details, and potentially attachments if you have suggestions, I was thinking of a bucket and also a brush to clean the streets/ work site, if you have any other good ideas I can try Quote
1980SomethingSpaceGuy Posted January 22 Posted January 22 Nice duo! Maybe increase the skid steer's cabin size to better match the dumper's scale? Quote
crazy technic Posted January 22 Author Posted January 22 I think that is the single most inportant change ill make because now it still looks very small 6 minutes ago, 1980SomethingSpaceGuy said: Nice duo! Maybe increase the skid steer's cabin size to better match the dumper's scale? Quote
Jundis Posted January 23 Posted January 23 What a cool idea for a duo! Kudos to manage to get the weight down to the max limit of the dumper. ;-) On 1/22/2026 at 5:11 PM, 1980SomethingSpaceGuy said: Maybe increase the skid steer's cabin size to better match the dumper's scale? Totally agreed, in similar scale, they would work even better. Quote
crazy technic Posted Monday at 07:58 PM Author Posted Monday at 07:58 PM The youtube video is done, here are the 2 tumbnails, tell me which you like best. The actual video will be released somewhere in the next weeks ( I'll put it here when it releases) also I made the cab of the skidsteer the right size. They are both under 300g, the tracked dumper is exactly 300g and the skid steer is 180g (proof in video) Quote
1980SomethingSpaceGuy Posted Monday at 08:45 PM Posted Monday at 08:45 PM I'd go with the construction duo; we just had a tracked vehicle themed TC so it might be confusing. Quote
crazy technic Posted Monday at 08:48 PM Author Posted Monday at 08:48 PM 1 minute ago, 1980SomethingSpaceGuy said: I'd go with the construction duo; we just had a tracked vehicle themed TC so it might be confusing. that's true, ill use the AB thumbnail testing on YouTube to see which is the best. happy to get some actual opinions because raw data helps less than actual opinions Quote
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