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 , 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 halfway 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 due to the lack of sufficiently light but strong materials, and a powerful enough drive for the screw.
In 2022 a drone based on Leonardo's design was made by a team of engineers from University of Maryland and was presented at a conference in San Jose. [2]
Leonardo di ser Piero da Vinci was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he has also become known for his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and palaeontology. Leonardo is widely regarded to have been a genius who epitomised the Renaissance humanist ideal, and his collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary Michelangelo.
The Château de Chambord in Chambord, Centre-Val de Loire, France, is one of the most recognisable châteaux in the world because of its very distinctive French Renaissance architecture, which blends traditional French medieval forms with classical Renaissance structures. The building was constructed by the king of France, Francis I.
The Château du Clos Lucé, formerly called Manoir du Cloux, is a large château located in the center of Amboise, in the department of Indre-et-Loire, in the Centre-Val de Loire region of France. It is located in the natural Val de Loire region. Built by Hugues d'Amboise in 1471, the palace has known several famous owners such as the French king Charles VIII and Leonardo da Vinci. Clos Lucé is 500 metres from the royal Château d'Amboise, to which it is connected by an underground passageway.
The Biblioteca Ambrosiana is a historic library in Milan, Italy, also housing the Pinacoteca Ambrosiana, the Ambrosian art gallery. Named after Ambrose, the patron saint of Milan, it was founded in 1609 by Cardinal Federico Borromeo, whose agents scoured Western Europe and even Greece and Syria for books and manuscripts. Some major acquisitions of complete libraries were the manuscripts of the Benedictine monastery of Bobbio (1606) and the library of the Paduan Vincenzo Pinelli, whose more than 800 manuscripts filled 70 cases when they were sent to Milan and included the famous Iliad, the Ilias Picta.
The Vitruvian Man is a drawing by the Italian Renaissance artist and scientist Leonardo da Vinci, dated to c. 1490. Inspired by the writings of the ancient Roman architect Vitruvius, the drawing depicts a nude man in two superimposed positions with his arms and legs apart and inscribed in both a circle and square. It was described by the art historian Carmen C. Bambach as "justly ranked among the all-time iconic images of Western civilization". Although not the only known drawing of a man inspired by the writings of Vitruvius, the work is a unique synthesis of artistic and scientific ideals and often considered an archetypal representation of the High Renaissance.
Enrico Forlanini was an Italian engineer, inventor and aeronautical pioneer, known for his works on helicopters, aeroplanes, hydrofoils and dirigibles. He was born in Milan. His older brother Carlo Forlanini was a physician.
The Lady with an Ermine is a portrait painting by the Italian Renaissance artist Leonardo da Vinci. Dated to c. 1489–1491, the work is painted in oils on a panel of walnut wood. Its subject is Cecilia Gallerani, a mistress of Ludovico Sforza, Duke of Milan; Leonardo was painter to the Sforza court in Milan at the time of its execution. It is the second of only four surviving portraits of women painted by Leonardo, the others being Ginevra de' Benci, La Belle Ferronnière and the Mona Lisa.
In aeronautics, an aircraft propeller, also called an airscrew, converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type.
A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of short take-off and landing (STOL) or short take-off and vertical landing (STOVL) aircraft cannot perform without a runway.
Renaissance technology was the set of European artifacts and inventions which spread through the Renaissance period, roughly the 14th century through the 16th century. The era is marked by profound technical advancements such as the printing press, linear perspective in drawing, patent law, double shell domes and bastion fortresses. Sketchbooks from artisans of the period give a deep insight into the mechanical technology then known and applied.
Leonardo da Vinci (1452–1519) was an Italian polymath, regarded as the epitome of the "Renaissance Man", displaying skills in numerous diverse areas of study. While most famous for his paintings such as the Mona Lisa and the Last Supper, Leonardo is also renowned in the fields of civil engineering, chemistry, geology, geometry, hydrodynamics, mathematics, mechanical engineering, optics, physics, pyrotechnics, and zoology.
Museo Nazionale Scienza e Tecnologia Leonardo da Vinci in Milan, dedicated to painter and scientist Leonardo da Vinci, is the largest science and technology museum in Italy. It was opened on 15 February 1953 and inaugurated by Prime Minister Alcide De Gasperi.
The Codex Atlanticus is a 12-volume, bound set of drawings and writings by Leonardo da Vinci, the largest single set. Its name indicates the large paper used to preserve original Leonardo notebook pages, which was used for atlases. It comprises 1,119 leaves dating from 1478 to 1519, the contents covering a great variety of subjects, from flight to weaponry to musical instruments and from mathematics to botany. This codex was gathered in the late 16th century by the sculptor Pompeo Leoni, who dismembered some of Leonardo's notebooks in its formation. It is now in the Biblioteca Ambrosiana in Milan.
Codex on the Flight of Birds is a relatively short codex from c. 1505 by Leonardo da Vinci.
Mario Taddei is an Italian academic. He is an expert in multimedia and edutainment for museums, a Leonardo da Vinci devotee and scholar, and an expert in the codexes and machines of da Vinci and ancient books of technology.
Leonardo's Horse is a project for a bronze sculpture that was commissioned from Leonardo da Vinci in 1482 by the Duke of Milan Ludovico il Moro, but never completed. It was intended to be the largest equestrian statue in the world, a monument to the duke's father Francesco Sforza. Leonardo did extensive preparatory work for it but produced only a large clay model, which was later destroyed.
The harpsichord-viola is a hybrid musical instrument based on the designs of Leonardo da Vinci on folio 93r of the Codex Atlanticus. It's a different project from the viola organista. It is about the size of a child's toy piano. It weighs 33 pounds and straps to the musician's chest. It's unlike anything else in the orchestra. It has the strings of a violin but is played with a keyboard, and it's powered by the musician's legs as he walks. It's built with the materials that Leonardo would have had on hand, including wooden pegs and gears run by twine. In the folio of Leonardo, you can see that the instrument has a harness. So it was invented as a way to play a stringed instrument while marching. The leg pumps a wooden motor, which moves a long loop of horsehair through the instrument. When the player presses the keys, the strings move up against the loop.
The Architonnerre (Architronito) was a steam-powered cannon, a description of which is found in the papers of Leonardo da Vinci dating to the late 15th century, although he attributes its invention to Archimedes in the 3rd century BC.
Leonardo's crossbow designs are a series of shooting weapon schematics designed by Leonardo da Vinci that are in the Codex Atlanticus. One version, a self-spanning infantry weapon called the Rapid Fire Crossbow, is found on sheets 143r, 153r, and 155r. The other is the Giant Crossbow design intended to be a mounted siege weapon found on sheet 149a in the Codex.
Gian Giacomo Caprotti da Oreno, better known as Salaì was an Italian artist and pupil of Leonardo da Vinci from 1490 to 1518. Salaì entered Leonardo's household at the age of ten. He created paintings under the name of Andrea Salaì. He was described as one of Leonardo's students and lifelong companion and servant and was the model for Leonardo's St. John the Baptist, Bacchus and Angelo incarnato.