Development of efficient propulsion package

For the tailor-made energy saving package, the companies combine the advantages of an optimised, highly efficient fixed pitch propeller with an asymmetric leading edge rudder with a propulsion bulb and adapted hub caps.
The energy saving package is said to provide the efficient and fuel-saving ART™ rudder to ensure highly effective manoeuvrability.  A special lay-out modifies the profile above and below the centreline of the propeller to counter the effects of the rotation of the propeller slipstream are countered.  This expands the cavitation-free rudder angle and reduces drag (increasing speed or improving fuel consumption), while the well-designed propellers prevent tip cavitation. Finally, the costa bulb, junction cap or boss cap fins prevent hub vortex losses and cavitation.
The energy saving package is currently available for fixed pitch propeller systems by MMG, in combination with Van der Velden® full spade rudders both as new design and retrofit.