Becker Twisted Fin

Name: Becker Twisted Fin
Brand: Becker Marine Systems

Pre-propeller energy-saving device with small flat duct ring and extended fins for container ships and other fast, slender vessels; power savings of up to 4%, no moving parts.

Description

The Becker Twisted Fin® (BTF, also known as the Becker Mewis Duct® Twisted) is an energy-saving device for faster vessels with slender sterns, such as container ships. Installed in front of the propeller, it generates pre-swirl that reduces rotational losses and improves propulsion efficiency, supporting EEXI, EEDI and CII compliance.

Design

Smaller, flat-profiled duct ring with much lower drag than the Mewis Duct, plus fins extending from inside the duct
The duct ring contributes thrust, stabilises the fins and reduces vibration
Custom designed for each hull geometry and propeller; can be combined with a new or existing propeller
Meets class requirements for strength, fatigue and vibration
No moving parts and no maintenance required

Key features

Average power savings of up to 4% for container ships (CFD, model tests and full-scale operation); more when combined with the Becker Twist Rudder
Less cavitation and vibration; improved course keeping
Suitable for newbuildings and retrofits; retrofit at regular or intermediate dry docks without removing the propeller, typically in five days

Applications

Container vessels
Gas carriers
Ferries and vehicle carriers
Navy vessels

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