Abstract
This chapter is designed to present various ideas to improve the performance of ship. It begins with the discussion of Voith-Schneider Propulsion (VSP) unit. VPS has blades that are vertically suspended and rotated about a vertical axis. It can be moved to produce thrust in any required direction in 360°. Number of vertical blades may be four, five, or six. Schottel thrusters are units that have a telescopic design. The unit descends downwards through the bottom shell to produce thrust through 360°. Grim vane wheel is a freely revolving wheel having a 20% larger diameter than that of a driven propeller in whose wake it is placed so that it can also reclaim some tip vortex energy. The Grim wheel turns in the same direction as the driven propeller. Feedback from vessels indicates fracture of the wheel itself. Perhaps more research and development are required to give the idea more support within the Marine Industry. However, it has possibilities. Propeller Boss Cap Fins are saving energy on over 830 ships around the world. These improve propeller efficiency by recovering the energy of the hub vortex. Voith cycloidal rudder is a new propulsion and maneuvering system for ships. This mechanism is placed behind a conventional propeller revolving on a horizontal axis.
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