Hello,
I decided to create one topic for posting some of my MOC:s, such as trucks, tractors and military vehicles. Let's start with my latest creation:
Toyota Hilux Double Cab

This was perhaps the most detailed creation I have ever done. RC 4x4, independent front suspension, leaf spring rear suspension (soft axles + shock absorbers), lockable central and rear differentials, and a 4-speed gearbox (manually controlled). A minus is that there was no space for rear diff lock controls, so it has to be clicked on from the below. I detailed the outdoors looks pretty far, but the indoors dont look so good.

Next, some tractors:

MTZ Belarus 1221.1

This one was fun to do. 4WD, swinging portal front axle (but no differentials :( ) and old 8880 rims mounted on large turntables.

 

Front-end loader (based loosely on Valtra N163)

This one had more playability. 4WD with swinging front axle too, remote-controlled loader height (but the other function is manual), lockable rear differential, DIY planetary hubs in the rear with 4:1 reduction, and a constant-difference central differential for linear gear reduction between front and rear axles. I also built this openable container and 1-actuator hooklift to spice the logistics games up a little.

Sorry for using these sawn-off ball joint beams; I have a pile of them so ruining two of them for a narrow tractor front axle won't hurt.

Continuing with the tractor theme:

Unbranded 4WD tractor

I wanted to build an RC tractor moc with the 94.8mm balloon tires in front so that I could use the 56mm Defender rims for the steered axle. I ended up in this design where the steering servo is fixed to the tractor body, moving a 1x7 gear rack that is attached on a link to the pendular front axle.
For the front and rear tire to have almost matching peripheral speeds, I used a 28:24 gear ratio between the axles. Here is the result:

Please guide me to other tractor MOCs with 94.8/107mm tire scale if there are any; I'm interested in what tractors people have scale modelled with these tires.

Nice work. I feel the wheel base is a little short, given the size of the wheels.

On 5/5/2024 at 12:37 PM, Paul B Technic said:

Nice work. I feel the wheel base is a little short, given the size of the wheels.

Thank you for your kind feedback; a longer wheelbase could also allow better offroad capabilities as the centre of mass could be more further to the front as the hub takes so much space. Perhaps I'll create a revision of this tractor design in the future following the design of some existing tractor.

It's been over a month now since my latest post, as I've been quite busy and stressed over writing my master's thesis in engineering. However, here's a small and rather unoriginal build I've managed to build every now and then:
Mercedes-Benz Zetros 6x6

Building this truck began during my latest impulse buying session in BrickLink. I've wanted to build narrow axles with diff locks and planetary hubs for a long time, so I bought a bunch of these red 2L driving rings and took them on a date with Mr. Power Drill to expand the hole from the other end so that the rings could lock with heavy duty diffs.Building these axles is possible using the 2473 gray 2L driving ring introduced in Yamaha MT10, but these weren't available at BL in sufficient quantities by the time I started building this.
I then built the chassis and leaf spring suspension around the axles, and finally the cockpit using as much of the Lego Zetros design as possible.

Sadly, the diff locks do not have a centralized toggling mechanism, as the front axle (with steering motor attached) does not have space for attaching the gear shifter lever on the top and operating it via an u-joint. I should overcome this issue later and create some other truck with diff locks on all axles.

For my next build, I have three different ideas:

• Tatra Phoenix 10x10
• Unimog trial truck with 107mm tires and my close-pivot point portal hub design
• SCARA robot

Huge truck I love it.

I love the look of that truck, well done.