A bird makes the same use of wings and tail in the air as a swimmer does of his arms and legs in the water.
The Notebooks of Leonardo Da Vinci (MacCurdy, 1938) - XVII Flight
A bird makes the same use of wings and tail in the air as a swimmer does of his arms and legs in the water.
The Notebooks of Leonardo Da Vinci (MacCurdy, 1938) - XVII Flight