This flying machine was designed to be driven by the mechanical power produced by a leaf spring, which was to drive the wings. This model testifies to the fact that Leonardo was trying to fit the leaf-spring mechanisms in use for land machines to his flying devices in place of human strength. The Museum model combines this idea with Leonardo's Articulated wing study, for which Leonardo tries to faithfully reproduce the structure of a bird's wing. Springs and joints where connected by means of rods.The purpose of this device was to guarantee the automatic return motion of the flexed wing.
The model is based on the drawing:
- Codex Atlanticus ff. 844 r., 863 r. (1493)
Milano, Biblioteca Ambrosiana