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This MOC was originally planned to be a third submission for BrickFair VA 2018 - after finishing my Red Beryl GT I realized I still had a month before the expo, and seeing that I had an abundance of lime pieces I decided a CLAAS tractor would be a perfect build. However, problems soon arose when I overestimated the amount of pieces I had, and I had to begin compromising parts of the build. When I realized the number of compromises I was making would greatly hinder the model's functionality and aesthetics, I decided to put it off until after the expo. The original chassis only contained M motors, had a poorly designed rear PTO and an inaccurate fake engine. However, after taking apart my BrickFair MOCs I was able to use the two L motors on my Red Beryl GT as the propulsion motors for the tracks. They sit side by side, driving the front sprockets with a 5:1 reduction. This left ample space in the rear of the chassis for the rear PTO and elevating mechanism. I originally wanted to include an inline-6 fake engine under the hood connected to the PTO motor, but due to lack of space, concerns of overloading the front end and the absurdity of an engine connected only to the PTO, I decided to omit it and simply connect the motor to the rear PTO. A driveshaft passes down the center of the chassis linking the M motor to the PTO, with a clutch gear and 3:1 reduction at the motor. The elevating rear attachment point was a modular build, which included a worm gear driving a pair of levers that uses links to raise/lower the attachment. This mechanism also uses a M motor with clutch gear and 3:1 reduction. Despite originally being a modular element, it fit into the chassis very well. As for the aesthetics, the hood was the most challenging part to model. I spent the bulk of my work on this project before BrickFair on modeling the hood, trying to get it as close as possible to the real thing. The curvature and combination of lime/white were especially challenging, and I ended up "marking" the bottom curvature of it using lime flex axles and used System pieces at various points. It was not perfect, but I was pretty satisfied with it as to how it compared to the real thing. The cab was much easier, but getting the proper angle with the front windscreen was also quite challenging. Restricting myself to only using black axles was the main obstacle - as I could not use beams due to the angle towards the bottom of the cab. I also had to make sure the roof was not placed at an angle, since I'm not a fan of roofs that angle downward to accommodate the windscreen angle. I ended up attaching the front windscreen to the roofs with beams at an angle - not the prettiest but better than a leaning roof I guess. The rear attachment, simple as it is, was very fun to build. I decided not to go too crazy with it, so I made something similar to the mower attachment on the back of the 8284. The mower blades are manually folded with mini LAs which also allow them to be angled. The red tiles with the "DANGER" print are custom printed pieces I got at BrickFair. The model, of course, has its share of drawbacks. The main one being the rear of the tractor, as I was simply too lazy to get the complex curves back there. I used panels to sort of get the curves, and left the battery exposed in the rear. Not everyone's favorite solution, but if they do it on official sets (e.g. 8043) then whatever I suppose. The lack of larger Technic sprockets was another problem - the tracks ended up "flatter" compared to the original tractor. I initially built the tracks with pairs of oscillating sprockets to sort of prevent this look, but this proved to be very bad as it would always cause the model to tilt on its front end. I eventually connected all the sprockets to a solid beam which solved the problem, but I cannot help but think the tracks are a bit out of proportion. I also had issues with the clutch gear in the rear PTO - it slipped with too little torque. This caused the mower blades to stop when bumped against anything. Adding another clutch gear or removing them altogether would have remedied the issue, but I simply overlooked it while building. Despite not having fulfilled its original intent as a BrickFair submission, I was nevertheless very satisfied with the result. It had its drawbacks, but in my opinion this was a great experience with modeling a real vehicle. Such projects allow me to actually consider how the real thing looks before choosing what piece to use, which makes the building process much more interesting. Video: Photos: -
Hey guys, here's a third model I'm making for BrickFair Virginia this year. I know the event's just weeks away but since I found myself way ahead of schedule I thought why not make a third MOC. It is, of course, going to be much simpler than my other BrickFair MOCs, but I have a feeling this build's gonna be interesting: UPDATE: I'm not bringing this MOC to BrickFair as it is likely going to place a strain on my already limited amount of necessary parts. There's no way I'll get this done in 10 days without making a ton of compromises, so I'm waiting until after BrickFair so I can make it better. I already have a good amount of this MOC done at this point - the entire chassis is pretty much together. The functions will include: Tank drive with a single Medium motor per track, geared down 3:1 Straight-4 piston engine Rear power take-off manually raised/lowered rear attachment The entire model only contains 3 motors, 2 driving the model with the third one driving the rear PTO as well as the fake engine. Note that the battery box and IR receiver are probably not in their final locations yet - I just attached them to the chassis at seemingly reasonable points to avoid a mess of wires while working on the model. I also realize the rear attachment is way too long so I'll definitely look at that part a second time. I'll also make at least one attachment for this tractor - either a mower or a crane like the 42054. If you guys have any suggestions for me, please let me know. Photos:
