Upside down coffee table?

Interesting ship in this week. Built with four Flettner Rotors. Designed to make use of the Magnus effect to assist propulsion and ostensibly to reduce fuel costs and emissions. Depending on the wind direction the fuel savings can be quite considerable. Rotors using this principle can also be found under the water too on rudders and on some escort tugs fitted to skegs.

 

There's your bit of, useless for some, info for the day. We're here to please.

Done