🛠️ Invention or technique

Poncelet water wheel

Rueda hidráulica de Poncelet

Date
1823-1826 · confidence medium
Place
Metz, Moselle, France
Credited to
Jean-Victor Poncelet
People
👤 Jean-Victor Poncelet1788–1867
Field
Matter & energy

What it is

An undershot wheel with curved blades that guides the water without impact, with an efficiency of about 60% against 25% for a flat-bladed wheel. It was designed for low-head streams.

Poncelet presented the idea in 1823 and published it in 1825-1827; he was a pioneer of calculating mechanical work in machines.

What it led to

  • modernisation of mills and factories on low heads
  • application of rational mechanics to turbine design
  • a step towards the water turbine
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Sources✓ verified 2026-11-04