Man-powered stepped wheels lifting water, and a ditch-emptier

Figure 15: man treading a stepped wheel to lift a container

A man climbs the steps of a large wheel, his weight turning it to raise a big water container. A small crossed-out sketch below shows a man before a pair of piston pumps.

Figure 16: treadwheel driving a scoop water wheel

A man mounts a stepped wheel whose motion turns a hydraulic wheel fitted with large scoops (cucchiai) that lift water. It couples a human treadmill drive to a scoop-wheel lift.

Figure 17: ditch and ditch-emptier

A ditch is shown with a ditch-emptying device set to raise its water. The study belongs with Leonardo's schemes for draining and moving water on a worksite.

Figura numero:

Un uomo monta su ruota gradinata che solleva un grande recipiente, con:

Sotto la precedente, piccola figura biffata di uomo davanti a una coppia di pompe a stantuffo.

Figura numero:

Un uomo monta su ruota gradinata che muove una ruota idraulica dai grandi cucchiai, con:

Figura numero:

Fosso e vuotafossi, con:

Figura numero:

Due ruote alzano e abbassano un peso che comprime l'acqua nella pompa.

Figure number:

A man mounts a stepped wheel that raises a large container, with:

Below the preceding, a small crossed-out figure of a man in front of a pair of piston pumps.

Figure number:

A man mounts a stepped wheel that drives a hydraulic wheel with large scoops, with:

Figure number:

Ditch and ditch-emptier, with:

Figure number:

Two wheels raise and lower a weight that compresses the water in the pump.

Man-powered stepped wheels lifting water, and a ditch-emptier

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Figure 15: man treading a stepped wheel to lift a container

Figure 16: treadwheel driving a scoop water wheel

Figure 17: ditch and ditch-emptier