Eolienne
MonumentHidden Treasure
A 21-metre steel sentinel erected in 1911, the Épuisay wind turbine is a masterpiece of rural engineering that has been listed as a Historic Monument: it supplied an entire village with drinking water thanks to the Vendôme wind alone.
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History
Standing in the heart of the Loir-et-Cher region like a proud vestige of the rural industrial age, the Épuisay wind turbine is one of the most unusual monuments in France to have been classified as a Historic Monument. Far from the Loire châteaux that monopolise the region's attention, this 21-metre-high machine tells another story: that of technical ingenuity at the service of the common good, at the dawn of the 20th century. What makes this monument truly unique is the convergence of two exceptional industrial heritages. The wind turbine belongs to the line of machines designed by Auguste Bollée, the great inventor from Mance whose hydraulic patents revolutionised the supply of water to the French countryside. Adopted and perfected by the engineer E. Lebert from 1898 onwards, these "pylon" systems combined metal robustness and hydraulic efficiency to provide isolated rural communities with a level of comfort long reserved for towns. A visit to the Épuisay wind turbine is a timeless experience. Visitors discover a slender metal structure whose five-metre diameter turbine looks ready to resume its age-old rotation. At its foot, the imposing reinforced concrete and brick reservoir, with a capacity of 200 cubic metres, bears witness to the remarkable foresight of the engineers of the time: water was stored for days when there was no wind, ensuring a continuity of supply that was the envy of many communes. The rural setting of the Vendôme region, with its gentle hills and open fields, is a reminder of why this site was chosen: here, the wind blows regularly, efficiently captured by this turbine, which supplied the communal washhouse and the homes of Épuisay for more than fifty-five years. As you contemplate this silent machine, you can see just how far we've come from the modernity of 1912 to the present day - and realise that the wind turbines of the 21st century are only distant heirs to this metal pioneer.
Architecture
The Épuisay wind turbine is of the "pylon" type, characteristic of machines designed in the wake of the Bollée-Lebert patents. Its all-metal structure rises to a height of 21 metres - a slender, elegant silhouette that contrasts with the softness of the surrounding Vendôme landscape. The pylon, made of riveted steel sections and ribs, offers both visual lightness and structural strength, in keeping with the principles of Belle Époque metal engineering. At the top of the tower, the 5-metre-diameter horizontal-axis turbine is the centrepiece of the system. Its blades, which could be turned to catch the wind from any direction, drove a pump that pumped the water up from underground to the storage reservoir. This mechanical system demonstrates a remarkable mastery of the hydraulic and aerodynamic principles of the time. On the ground, the 200-cubic-metre reservoir is the site's second major architectural feature. Built in reinforced concrete and brick - a combination of materials typical of utilitarian architecture in the early 20th century - it has a sober, functional shape that contrasts with the slenderness of the pylon. Buried or semi-buried to take advantage of the thermal inertia and preserve the quality of the water, this civil engineering structure illustrates the complementary relationship between the above-ground structure and the underground infrastructure that defines the whole of this exceptional technical monument.
Related Figures
Auguste Bollée — inventeur manceau du XIXe siècle, créateur des brevets d'éoliennes-pompes hydrauliques dont dérive la machine d'ÉpuisayE. Lebert — ingénieur-constructeur-hydraulicien qui reprit les brevets Bollée en 1898, perfectionna le modèle pylône et supervisa l'installation de l'éolienne d'Épuisay en 1911
