Becker Mewis Duct^®

The Becker Mewis Duct^® (BMD) is a novel hydrodynamic Energy-Saving Device (ESD) for full form and slow speed vessels like tankers and bulk carriers.

The design goal of the Becker Mewis Duct^® in comparison with other ESDs is to improve two fully independent loss sources, namely:

• Losses in the ship’s wake via the duct
• Rotational losses in the slipstream via the fins
• In addition, the installation of the BMD leads to positive effects with propeller cavitation, yaw stability and rpm-stability in a seaway.

The realistic possible power reduction lies between 3 and 8 %. The average power reduction amounts to 6.2 % after more than 200 model test series in 13 different towing tanks. This means reduction of CO₂ and SO_X to the same extent that the power reduction.

For more information see the publication No 51.

Short history:

• March 2008: patent pending
• September 2008: first model test
• September 2009: first installation in full-scale
• September 2010: 50 BMDs are sold
• October 2013: the 500^th BMD has been sold
• December 2015: the 1000^th BMD has been sold
• May 2021, the 1500^th BMD has been sold

(all listed sales figures include BMD & BMDT devices)

Becker Marine Systems in Hamburg is marketing and selling the Becker Mewis Duct^® exclusively.