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| My Mechanical Bull iteration with LEGO Powerfunction system | 8891 Mechanical Bull (1991) with 9V motors system |
My very own Lego Mechanical Bull, inspired by the old Lego Technic idea book(8891), is made entirely with Technic beams and Lego Power Function parts. There were 4 Lego Technic idea books (8888, 8889, 8890, and 8891) ever published between 1980 and 1991. These books contain many fun Lego instructions on simple machines, motor systems, pneumatic systems, and Lego Control Center. The Mechanical Bull is one of the Lego Control Center examples in the idea book 8891. During the iteration, I am fascinated by some of the profound design decisions made in the original instructions around the use of gears. Even with the modern Power Functions parts and tons of new gears, there are very little options on combinations in order to keep the structure small and robust. My next step will be finding ways to speed up the rotation.