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Hello all, I would like to present a new project. It's a rotary drilling rig based on the Liebherr LB44 and based on the chassis of the lego technic crawler crane 42042 Here are some WIP pictures, I used the carriage (with some mods) and part of the superstructure (mainly the gearbox) of the 42042 because it's quite a good design and starting point. I already have put a reduction gear on the upper LA's (not visible in the pictures) because with the direct link the motor was not able to lift the boom. On the real machine the winches are located on the boom, but on my machine I will use the existing winches of the 42042. Also the driveshaft of the upper LA's will be modified to make it a bit stronger. Next picture is the boom in a more or less rest-transport position As always comments are always welcome.
