COGOG drive
A COGOG drive (for combined gas or gas ) is a ship drive concept in which two different gas turbines can be switched to the drive shafts. A highly efficient, less powerful turbine is used for cruising , while a more powerful turbine is used for high speeds.
As with the COGAG drive , the advantage is the reduced fuel consumption, since a small turbine at 100% power consumes less fuel than a twice as powerful one that is operated at 50% power. In contrast to the COGAG concept, the turbines for marching and high-speed travel are not used in parallel here, but always only used individually. This eliminates the complex gearbox of the COGAG drive, the price is the higher total weight of the drive with the same maximum output.
COGOG is mainly used on warships . Examples are the frigates of the Dutch Kortenaer class and the destroyer of the Canadian Iroquois class .
See also
Individual evidence
- ↑ Queen Elizabeth-class aircraft carrier (CVF) Machinery and Propulsion. Navy matters, archived from the original on December 9, 2009 ; accessed on May 5, 2016 .