The "tube" on the stern is actually a "Sail"
The Norsepower Rotor Sail Solution is mainly designed for tankers, bulk carriers and ro-ro vessels, where:
The required installation space is available on deck.
Cranes and cargo handling equipment do not prevent the installation of Rotor Sails.
There is a high proportion of time-at-sea, and the prevailing wind conditions are favourable.
The essential parts of the Rotor Sail Solution are:
Rotor Sails, which deliver the forward thrust (2 or more units installed on deck).
Wind & GPS sensors, which provide the automation unit with real-time wind speed and direction information as well as ship speed and course data.
A control panel, which gives the captain full control of the operation and performance of the Norsepower Rotor Sail Solution.
An automation unit, which optimizes the forward thrust of the Rotor Sails.
A power supply from the grid of the vessel to the electric motors that power each Rotor Sail.
The required number of Norsepower Rotor Sails and the size of each sail are based on the size, speed and operating profile of each vessel. Norsepower Rotor Sails are available in three sizes with different Rotor Sail heights of 18, 24 or 30 metres. The Norsepower Rotor Sail Solution is typically delivered as a full-service solution that includes both delivery and maintenance of the hardware and software components.
- See more at:
http://www.norsepower.com/rotor-sail-so ... 3rLB4.dpuf