TC schrieb:
> Quite spectacular looking thingy - but the principle is the same as used 
> here:
> 
> http://de.wikipedia.org/wiki/Schiffshebewerk_Niederfinow

It appears a good deal more complicated in the actual implementation: 
192 counterweights, double cables for safety, and not to forget the 
additiona worm drives normally running "idle", just in case the second 
set of cables doesn't hold either. All this is done away by the 
exceptionally simple construction of the Wheel.

As an aside, by using another caisson as the counterweight you also get 
effectively twice the capacity for the same total weight.

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