In the early nineties of the fifteenth, Leonardo, regarding the investigations carried out on the flight mechanic, abandons the study of flight-wing flying to test the wing partially fixed. The design of this machine, commonly defined ornithopter, is undoubtedly a step forward aerodynamic research such inputs are still inadequate for sustenance in flight and still based on finding a technology that moltiplicasse strength. Indeed, it is proposed as an experience to reach the intermediate type dell'aliante, where man is able to direct the machine, relying dexterity with the movement of her body, in the balance and the change of direction, complicated systems and the gears imagined to send the motion necessary for the beat of wings, are simplified. The wing is no longer constituted as a whole from a single structure, but is designed partially broken and fixed. Fixed and rigid wing remains in the internal matters closer to the pilot which, ruler of the machine and air, ranks, supported by a sling straps, center and vertically to ensure with their weight balancing the facility while the extreme making is made mobile in order to govern the direction of the unit.
C. 1493 / 95. Atlantic Code