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Sea Platforms

USN expects to meet Columbia-class sub-motor delivery schedule

03 November 2017

Despite some earlier problems with a prototype main propulsion motor for its Columbia-class strategic submarine replacement fleet, the US Navy (USN) expects to keep to the proposed delivery schedule for that equipment, Admiral James Caldwell, director of naval nuclear propulsion, said.

“We’re still on track to deliver the final motor to the shipyard,” Adm Caldwell said during the Naval Submarine League Annual Symposium and Industry Update on 1 November.

Overheating issues with the motor were disclosed by federal lawmakers and confirmed by the USN in May.

“This is a preproduction motor,” Adm Caldwell emphasised during the symposium.

While the submarine's main source of power will come from its nuclear reactors, the USN is also working on a new electric motor drive for the Columbia class.

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