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Mercedes

Unimog (V4 Version)

Monday 29 August 2011, by Nico71


See it online

Technical data

Scale (wheels used)
Width 1 studs
Total Weight 1 grams
Transmission 4x4
Motorization 1 motor(s) - PFS XL

working fake motor
Steering motor

without steering wheel
Onboard Battery Box PFS

The first Unimog I designed was in the 2008 and had good climbing abilities for his technology (no frame, no portal live axle and no panels). Today, my new unimog is far better and many things were improved.

JPEG - 97.3 kb

Portal live axles : high ground clearance with strong and reliable axles
Reinforced hubs : thanks to a new design of hub, enables the truck to not have too camber angle in downhill
94mm wheel : more ground clearance than the 81mm one
Double wishbone chassis : build around the battery box, which enables to have not lot of parts and a lower center of gravity, based on Jeep’s frame
Gear ratio : 12/20 and 8/24, 9 time faster than the first unimog, 3 timesfaster than the Jeep.
Ackerman steering : enable to turn with a smaller turning radius spite of the lack or differentials

JPEG - 121.7 kb

Concerning the design, the cab is also new. It fits with the new scale and global design of U5000 series. The doors can be opened and the bonnet too. The fake engine is a 4-cylinder engine lengthways mounted (the first unimog had a crosswise engine, which was a mistake).

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Regarding the climbing abilities : they are better than the jeep. Because of the lack of the differentials but the turning radius is bigger as wel. Here is a small board to compare Lego version angle and real unimog.

Real version VS Lego Version

Turning radius : 14.5m – 50cm

Weight : 11t – 1.2kg

Power : 180hp – 6W (0.008 hp)

Clibbing angle : 45° – 45° (100%)

Aproach and departure angle : 45° – 60°

Side Slope Angle : 38° – 45°

Forum posts

  • Great design Nico,
    I applaud your new front axle, as I think the steering geometry is perfect. Getting the steering axis as close the wheels as possible is critical for good steering. I have found this gemetry to be effective in many of my trucks. Also, from the video, I am impressed with how well the gearing has worked for the offroad and climing abilities. Picking a good drivetrain gear ratio is very difficult, and it seemed to work well for this truck.

    Well done.

    View online : http://www.brickshelf.com/cgi-bin/g...

  • Nice truck Nico.

    About the comparison with the real Unimog, why not compare specific measures? Like: HP/kg for HorsePower, or cm/cm(Wheelbase) for the turning radius.

    Clement