“Remember that your bird should have no other model than the bat, because its membranes serve as an armour or rather as a means of building together the pieces of its armour, that is the framework of the wings.”

The Notebooks of Leonardo Da Vinci (1938), XVII Flight

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Leonardo Da Vinci363

Italian Renaissance polymath 1452–1519

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“If you take as your pattern the wings of feathered birds, these are more powerful in structure of bone and sinew because they are penetrable, that is to say the feathers are separated from one another and the air passes through them. But the bat is aided by its membrane, which binds the whole together and is not penetrated by the air.”

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The Notebooks of Leonardo Da Vinci (1938), XVII Flight

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Context: Our fate lies in your hands, to you we pray
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