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The poncelet (p; named after Jean-Victor Poncelet) is an obsolete unit of power, once used in France and replaced by cheval vapeur (cv, metric horsepower). The unit was named after Jean-Victor Poncelet.[1]

One poncelet is defined as the power required to raise a hundred-kilogram mass (quintal) at a velocity of one metre per second (100 kilogram-force·m/s).

1 p 
= 980.665 W = 1⅓ cv (metric hp) = 1.315 hp (traditional horsepower)


  1. ^ François Cardarelli, Encyclopaedia of Scientific Units, Weights and Measures: Their Si Equivalences and Origins, Springer, 2003, ISBN 185233682X, page 527