Comment Re:just put a motor on the elevator itself (Score 2) 248
I have been down a 2km mineshaft(the shaft is deeper, but they only go down in +/-2km sections) in a 'cage'. There is no counterweight, but the AC winder that drops (yes, 'drops' is the right word) you and hauls you back out is pretty powerful. They account for cable weight and extension because there are rails in the cages and they need precision to match them up. They get about +/- 1cm. Operator skill is important..
Yes. It is possible even with old style cables, but to get anywhere in a reasonable time, you have to go bloody fast, and it is honestly really scary. It took us about 5 minutes to reach the bottom most of that time was slowing down. I don't recommend it for the the general public. Many shorter elevators are a far better idea. Can you imagine stopping at every floor for 1km?