Let’s take a look at some of the simple mechanisms that they use. Pulleys and gears.When a flag is raised, it will often be lifted using a pulley mechanism. A pulley is a wheel on a fixed axle.

This drives the inner pulley at a ratio depending on the spacing ... like this strain-wave gear and this planetary gearbox, are amenable to 3D printing. Looks like the Inception Drive could ...

This video demonstrates testing the strength of LEGO gears and pulleys by aiming to lift 200 kg using a single LEGO Power Functions Medium Motor. The experiment explores the maximum lifting force ...