Ship&Offshore | Issue 05/2018
Four-stroke engine on the fast track
wärtsilä 31 The demand for what the Guinness Book of World Records calls ‘the world’s most efficient four-stroke engine’, the Wärtsilä 31, shows no signs of slowing down. It is the first in a new generation of medium-speed engines designed to raise efficiency, fuel and operational flexibility, reliability and environmental footprint, while reducing the total cost of ownership, writes Ulf Åstrand, director product development programmes at Wärtsilä Marine Solutions.