Flying blades nearly as long as the Saturn V space rocket and with enough horsepower under the hood to single-handedly supply electricity to 18,000 homes, the world’s biggest wind turbine, Siemens Gamesa’s long-promised ‘1X’ machine, has been launched, propelling the German-Spanish company back to top of the offshore OEM league table and creating a strong updraft for the industry’s chances of building projects at merchant market prices by 2024.