This model of a helicopter has been constructed from a sketch by Leonardo Da Vinci (1452-1519). Da Vinci was the most outstanding Italian painter, sculptor, architect and engineer of the Renaisance period. He had a wide knowledge and understanding far beyond his times of most of the sciences, including biology, anatomy, physiology, hydrodynamics, mechanics and aeronautics. His notebooks, written in mirror writing, contain original remarks on all of these areas.
© Science Museum / Science & Society Picture Library