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Truck Trial Mercedes Uniknick
Tamas Juhasz posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I present my newest trial truck, a pretty special one, this Mercedes Uniknick: (folder: http://www.brickshel...ry.cgi?f=515930 ) ORIGINAL: http://www.brickshel...spiration02.jpg This construction has central steering, this allows to have only one gear from the driving motors to the wheels. Reduction is 5:1, or 3:1 (has enough torque with it). I didn't want to make an average central steered vehicle like dump trucks, so I decided to add something new. One of the problems was the stability. This kind of off road vehicles like to fall over, that's enough when one section(front or rear) is turned 90 degrees. So this one has a linked like suspension, but with gears and turntables instead of links( not my idea, TT made it in this truck: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=444654 ): So this construction allows to do these at the same time: There is two version from this truck, one with PP wheels(secondary version) and the one with cutom RC4WD crawler tyres(primary model). The PP wheeled truck weights 1767 g, the crawler wheeled 1423 g. I know, it looks much better and realistic with the RC4WD tyres, that's the main reason I used them. The tyres give a bit better climbing abilities (PP wheels are still good), the highest obstacle was 1,5 times bigger than the wheels's diameter. For steering there is one XL motor to have enough power to do it. It's necessary because of the 16 t turntable driving gears, there are two of them, one on each side to make the steering reliable. There weren't any problem with it. Front lights: The hardest part in the building process was to make the central part, to be reliable and functional with keeping the proportions of the original Uniknick. I made a video for each version. Note the PP wheels abilities compared to the crawler tyre. RC4WD Crawler wheel: PP wheel: Hope you like it.