Leonardo may be the model for Platon.
The painting is a portrait of the wife of a Florentine merchant. Her name was Lisa Gherardini.
He did build a working model of one.
He impacted my life allot he is my role model.
Like most figures who achieved the status that Leonardo De Vinci achieved, he did have a role model in his apprentice Andrea di Cione. Cione was one of the most celebrated artists in his day and he encouraged De Vinci to practice literature, history, and philosophy as well as art.
It is said he made a couple of tests, but no successful flights are recorded.
At least two horse sculptures, the model and full sized clay cast model for Gran Cavallo.
If you mean the jewel held to her forehead by a chain (or fillet), it is called a "ferroniere". It was worn by women in Italy and France during the 16th Century often to hide the lesions from syphillis.
He first roughly sketched the design he was about to paint with lines leading from outside the painting to the very middle of the painting. He followed these guidelines to create realistic paintings.
Click link below and see his drawing + one modern model! Note that the 'helicopter' was never executed!
A device used to draw parabolas. There are sketches by Leonardo da Vinci of a device that was supposed to do just that, but I can't find evidence of a working model.
I think he built it with the help of his uncle. It was a model made perhaps by looking at maple seeds falling. Look at the link below: