This is how two contra-rotating propellers can make ships more energy efficient

By using two propellers that rotate in opposite directions, a ship can use less energy to move forward. New knowledge means that more ships can use the technology, including Hurtigruten's Sea Zero project for its coastal cruise ships.

from Energy & Green Tech News - Energy Sciences News, Green Tech, Energy, Energy Science https://ift.tt/ufV50UP

SHARE SHARE SHARE