In height or width
With a hydraulically driven rudder propeller the hydraulic motor can be placed on the side of the top gear drive (Z-drive type), or at the top of the gear drive (L-drive type).
When is hydraulic drive recommended?
Hydraulic propulsion is recommended specifically for large vessels that need considerable hydraulic power packs for other large hydraulic systems on-board, e.g. large cranes or winches. The hydraulic power packs can be combined and used for various purposes.
Advantages of hydraulic drive
Disadvantages of hydraulic drive