Some stuff » repair https://blog.yhuang.org here. Wed, 27 Aug 2025 08:50:58 +0000 en hourly 1 http://wordpress.org/?v=3.1.1 escalator https://blog.yhuang.org/?p=288 https://blog.yhuang.org/?p=288#comments Thu, 18 Nov 2010 18:45:08 +0000 admin http://scripts.mit.edu/~zong/wpress/?p=288 How do escalators work? I’ve wondered for years how escalators recycled their step blocks internally. At one point I thought they slid past each other on all four faces to save on turning radius (because I thought the blocks locked along grooves). Today I see an escalator under repair. Now the answer is clear. It’s much simpler than that: the blocks just turn along a track in the most obvious way imaginable.


Also, world’s shortest escalator:

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