The mighty HMS Queen Elizabeth aircraft carrier is fitted with two Dellner Brakes ‘stopping, turning, locking’ (STL) systems that, weighing in at 11,000kg each, are the biggest STL systems that Dellner Brakes has ever built.

Each of the carrier’s two propeller shafts is fitted with a custom-designed Dellner Brakes STL system that allows operators to stop, hold and securely lock each shaft independently, and to individually turn the shafts and giant 33 tonne propellers for maintenance and blade assembly. The STL system is operated from a push button control panel that integrates fully with other on-board systems.