Leonardo's aerial screw
The Italian polymath Leonardo da Vinci drew his design for an "aerial screw" in the late 1480s, while he was employed as a military engineer by Ludovico Sforza, Duke of Milan from 1494 to 1499. The original drawing is part of a manuscript dated to 1487 to 1490 and appears on folio 83-verso of Paris Manuscript B [it; pl], part of the papers removed from the Biblioteca Ambrosiana in 1795 by Napoleon and still held by the Institut de France in Paris.
Leonardo biographer Walter Isaacson has expressed the belief that it was “devised for a theatrical spectacle”.[1] The "aerial screw" was one of several aerial machines drawn by Leonardo, including an early parachute, an ornithopter and a hang glider.
The pen-and-ink sketch outlines an idea for a flying machine similar to a modern helicopter, with a spiral rotor or "aerial screw" based on a water screw, but intended to push against the fluid of the air instead of water.
The design comprises a large structure, built on a solid circular platform, with a central vertical pole supported by three diagonal members meeting at a small circular plate about half way up the pole. The upper half of the pole is the supportive axis for a large spiralling sail of linen with a radius of about 5 m (16 ft), stiffened with starch. The inner edge of the sail winds clockwise around the pole, while the outer edge of the sail is connected by ropes or wires to a ring that rotates around the lower platform. The design envisions a crew of several people on the wooden platform running around the central pole while holding handles that rotate the sail.
Leonardo's annotations suggest that a linen aerial screw, if turned quickly enough, would push against the air and lift the structure into the air. The notes indicate that Leonardo built small flying models of the aerial screw, but there were no indications for any provision to stop the reaction against the rotation of the sail from making the craft itself rotate in the opposite direction. It is conceivable that Leonardo could have constructed small working models, but a full-size working version could not have been realised for want of sufficiently light but strong materials, and a powerful enough drive for the screw.
In 2022 a drone based on Leonardo's design flew.[2]
- Modern models
- Model in the Museo Nazionale Scienza e Tecnologia Leonardo da Vinci, Milan
- Model in the Hubschraubermuseum Bückeburg
See also
References
- Folio83-verso, Manuscrit B, Institut de France
- Machines, Aerial Screw, Manuscript B, Folio 83V (1489), Leonardo3 Museum
- Leonardo da Vinci's helicopter: 15th-century flight of fancy led to modern aeronautics, The Conversation, 3 May 2019
- Leonardo da Vinci's Aerial Screw, COVE, 22 May 2019
- v
- t
- e
- The Annunciation
- The Baptism of Christ ✻
- The Madonna of the Carnation
- Ginevra de' Benci
- Benois Madonna
- The Adoration of the Magi
- Saint Jerome in the Wilderness
- Madonna Litta ✻
- Virgin of the Rocks
- Portrait of a Musician ✻✻
- Lady with an Ermine
- La Belle Ferronnière
- The Last Supper
- Sala delle Asse
- Portrait of Isabella d'Este
- The Virgin and Child with Saint Anne and Saint John the Baptist
- Buccleuch Madonna ✻
- Salvator Mundi ✻✻
- Lansdowne Madonna ✻
- The Virgin and Child with Saint Anne
- Mona Lisa
- La Scapigliata
- Saint John the Baptist
- Medusa
- Madonna and Child with the Infant Saint John the Baptist
- The Holy Infants Embracing
- The Battle of Anghiari
- Leda and the Swan
- Budapest Horse
- Horse and Rider
- Sforza Horse (unexecuted)
- Study for the Madonna of the Cat
- Compositional Sketches for the Virgin Adoring the Christ Child, with and without the Infant St. John the Baptist
- Head of a Bear
- The Head of the Virgin in Three-Quarter View Facing Right
- The Martyrdom of Saint Sebastian
- Head of a Woman
- Vitruvian Man
- Head of Christ
- Studies of the Fetus in the Womb
- Portrait of a Man in Red Chalk
- Cultural references
- Namesakes
- Portraits of Leonardo
- Conservation-restoration of The Last Supper
- Mona Lisa replicas and reinterpretations
- High Renaissance
- Mathematics and art
- The Lost Leonardo
- ✻ Collaboration
- ✻✻ Possible collaboration
- Category