| 摘要 |
he present invention proposes the placement of the propellers 19 on the prow so that they can act as traction propellers into still waters. In this way, the efficiency of the machines will be increased, which results in speed increase enhanced by the backward launching of water, via the ducts 10 acting as jet-aircrafts jets. The water of said ducts constitutes the constant ballast of the craft. |
