Helicopter rotor blades, or screw-model, by Penaud, 1872. Hand-colored woodcut
Hand-colored woodcut of a 19th-century illustration
Size: 4872px × 3711px
Photo credit: © North Wind Picture Archives / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -fashioned, 1800s, 1872, 19th, aeronautics, air, alphonse, aviation, century, diagram, europe, european, flight, france, french, helicopter, heritage, historic, history, invention, penaud, rotor, science, technology, traditional, transportation, travel, vintage
