For Leonardo, what often constituted the true end product of his mechanical designs?
Answer
The demonstration of the principle through drawing (dimostrazione)
When analyzing the volume of mechanical drawings, it is clear that for Leonardo, the act of demonstrating the principle visually through precise drawing, or *dimostrazione*, was frequently the intended final goal.

#Videos
Thousands of Pages of Inventions, Ideas and Flying Machines | PBS
I made all of Da Vinci's Inventions! - YouTube
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