A sketch by Leonardo da Vinci of a flying machine known as the 'helical air screw' or the 'airscrew'. It was designed to compress air to obtain flight, similar to modern helicopters. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source |
Bildgröße: | 5246 px × 3628 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |