Sail

A super efficient sail was invented by Leonardo da Vinci in anticipation of a sailing trip with his dad, Signor da Vinci.

History
Leo designed the special sail as his dad, Signor da Vinci, was going to take him sailing for the weekend. He attempted to show off his smaller scale model and tell his friends about its design but they were too focused on the news Giovanni Salvatore coming to the Medici Palace. Verrocchio then informed Leo that his dad had cancelled, much to his disappointment. The big sail was then seen lying in the courtyard unused. (Servant of Florence)