This kind of Bucket Wheel Excavators work in the open brown coal mines near Aachen, Düsseldorf and Cologne in the far west corner in Germany. They are more then 200 metres long and reach a height about 100 metres. They could mine about 300.000 m³ of brown coal every day.
The total weight is about 13.000 t. Such a machine can only be build up in the mine – this takes about 4 to 5 years. The construction of the LEGO® modell lasted "only" 4 long weekends. The real chains are 3 metres wide and 30 metres long. The whole excavator has got 12 of these chain drives. More then 1000 wide Technic chains were used in the LEGO® model. All of them are powerded, but the gears are to weak to move the more then 10 kg heavy machine :-(
This is a great Lego construction! I am also considering to build one. So I have made some calculations. If a Lego figure is 1:40 and the giant is 96 m height the Lego construction become 2,4m height. So you have to know that this construction is about 3-4 times smaller than a fig scale one. Amazing, but true. In fig scale, even one caterpillar width should be 18 pin (not long).
And their are 10 of those monsters in Aussichtspunkt Tagebau (advice see google earth).
This is a Fantastic model with lots of accurate detail and working parts I especially appreciate the work that went into the Cutting wheel. I cant tell from the photos but do you have a working conveyor from the wheel? Keep on building i look forward to seeing more mining machinery. check out the mining equipment on my site If you get a chance.