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Sea Trials Earn Green Light

GE gas turbines power U.S. Navy mechanical-electric propulsion system

Posted on April 17, 2014

The U.S. Navy’s future USS America (LHA 6) amphibious assault ship has completed successful acceptance sea trials powered by two GE LM2500+ marine gas turbines.

The sea trials were conducted in the Gulf of Mexico by Huntington Ingalls Industries, close to its Pascagoula, Mississippi, U.S.A. shipyard.

The LHA 6 ship's hybrid mechanical-electric propulsion system consists of two LM2500+ gas turbines and two 3729 kW auxiliary propulsion motors, allowing the ship to reach speeds in excess of 20 knots. GE said the hybrid propulsion system enables the ship's propellers to be driven either by the gas turbines or by the electric motors, which are powered from the ship service electrical system.

America-class ships are 257 m long, 32.3 m wide and displace 45 692 tonnes, and can accommodate a crew of 1204 (102 officers) and 1687 troops. The LM2500+ gas turbines were manufactured at GE’s Evendale, Ohio, U.S.A. facility.