The function which the wing performs against the air when the air is motionless is the same as that of the air moved against the wings when these are without motion.
The Notebooks of Leonardo Da Vinci (MacCurdy, 1938) - XVII Flight
The function which the wing performs against the air when the air is motionless is the same as that of the air moved against the wings when these are without motion.
The Notebooks of Leonardo Da Vinci (MacCurdy, 1938) - XVII Flight
