| 摘要 |
In order to further improve the drive efficiency in a propellerless pre-nozzle (10a, 10b, 10c) for a drive system for a watercraft which has a water inlet opening (12) and a water outlet opening (13) in the interior whereof a fin system (14) is located and whose inlet area has no fin system (14), it is proposed that the pre-nozzle (10a, 10b, 10c) should be configured rotationally asymmetrically. |
