Lego PF Medium Motor with gears and pulleys lifts a hefty 102.2 kg. Gear ratio 15:1 and tackle velocity ratio 8:1. Only lego parts were used, except for the string. Enjoy! :)
Development videos:
Part 1 pulleys:
Part 2 gears:
Part 3 gears and pulleys:
List of parts:
1.5 meters of string Stabilit Vielzweckschnur auf Polyamid 1.3 mm, max 25 kg (bought from Bauhaus)
1x Power Functions M-Motor (8883)
1x Power Functions Battery Box (8881)
1x Power Functions Control Switch (8869)
2x Plate 2 x 16 (4282)
2x Plate 2 x 4 (3020)
12x Technic, Brick 1 x 16 with Holes (3703)
2x Technic, Brick 1 x 6 with Holes (3894)
6x Technic, Brick 1 x 4 with Holes (3701)
1x Technic, Liftarm 1 x 2 Thick (43857)
1x Technic, Liftarm 1 x 2 Thin (41677)
2x Technic, Pin 3L with Friction Ridges Lengthwise (6558)
2x Technic, Pin with Friction Ridges L
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