On: Fist-sized 11M-to-1 gearbox

[freshyill]

I stayed at the Westin Bonaventure in LA recently. An employee told us rotating bar at the top takes something like two hours to make a complete rotation. It was disorienting to have everything around you be constantly changing, yet so subtly.

[onion2k → freshyill]

Using the contraption in the article hooked up to a motor at 600rpm (typical for a diesel engine), it'd take about 12 and a half days to rotate something.