1490 to 1505
Leonardo’s greatest and most famous ambition was to fly. Realising that man lacked the required muscular power to lift a flying machine into the air, beating wings disappeared from his designs for flying machines.
Instead, he began to consider the possibility of sail flight or gliding. He began to study the flight of birds intensely in order to understand how they exploited the air currents and wind, and recorded his observations in the so-called Codex on the Flight of Birds (in Leonardo’s own words Sul Volo degli Uccelli) .
Source/Attribution
Universal Leonardo
Added Wed, Jul 8 2009 at 11:01PM UTC by