Portuguese 
English 
Spanish 
4 min of reading 
0 comments 
9,200-ton, 100,000-hp Destroyer USS Patrick Gallagher Enters Sea Trials Before Delivery to US Navy, Concluding Flight IIA Line as Fleet Advances to Flight III Ships with More Modern Radar and Power Systems
The U.S. Navy has commenced the sea trials phase for the destroyer USS Patrick Gallagher (DDG-127), a 9,200-ton vessel equipped with 100,000 hp engines, in a decisive step before its official delivery to the fleet.
The ship departed the General Dynamics Bath Iron Works shipyard in Maine and entered open waters for performance evaluations. The information was released by the company on April 28, following the vessel’s departure for final pre-delivery trials.
This phase marks an important moment for the program, as the USS Patrick Gallagher concludes the Flight IIA Technology Insertion production line. From this point forward, the Navy will advance to the Flight III destroyers, considered more modern.
-
A new cold front changes the weather in Brazil, reinforcing heavy rain and the risk of storms in the South and Southeast, spreading instabilities across parts of the North and Central-West, and maintaining an alert for low humidity in the interior of the country.
-
Xiaomi broke the 4 GHz barrier on a smartphone chip — and did it without the big cores that everyone thought were mandatory…
-
Nasa’s tool is viral again and lets anyone write names with real images of Earth seen from space, using satellite records from the Landsat program that have been monitoring forests, rivers, and cities for over 50 years.
-
Scientists created a building block made of algae that grows with sunlight and CO₂, is 3 times stronger than concrete, and can cut 8% of global emissions if used at scale.
US Navy Tests Destroyer Before Delivery
Sea trials are conducted under the responsibility of the shipbuilder, not under direct Navy command. The objective is to confirm that the ship meets the operational standards required for acceptance and integration into the fleet.
The USS Patrick Gallagher was built as the last Flight IIA Technology Insertion variant. This version was developed to maintain the number of ships in operation while more advanced designs enter production.
The destroyer retains the Aegis combat system, already used by the fleet, and remains compatible with ongoing operations. The vessel also features 96 vertical launch cells, designed for missiles used in attack, air defense, and anti-submarine warfare missions.
The continuity of these systems is significant as the Navy prepares radar and power improvements for upcoming ships. The current model, therefore, serves as a bridge between the Flight IIA line and the new Flight III generation.
100,000 hp Propulsion Undergoes Sea Evaluation
The focus of the trials includes propulsion, maneuverability, autonomy, and system integration. The ship is powered by four General Electric LM2500 gas turbines, capable of generating approximately 100,000 shaft horsepower.
With this setup, the destroyer is expected to reach speeds between 30 and 31 knots. This performance is equivalent to approximately 35 to 36 miles per hour, within the vessel’s anticipated parameters.
Engineers conduct speed trials at different power levels. Each stage records performance data, allowing results to be compared against the requirements for Navy acceptance.
Maneuverability evaluations are also performed, measuring the ship’s response in turns and stability during course changes. The vessel also undergoes emergency stop tests, which verify the speed of movement interruption from maximum velocity.
In this trial, propulsion is reversed to measure deceleration capability. The procedure helps evaluate the ship’s behavior in situations requiring rapid response during navigation.
Systems Operate Together During Tests
Endurance tests monitor fuel consumption, cooling system, and exhaust gas conditions during prolonged operation. Evaluations are conducted in opposite directions to reduce interference caused by wind and sea currents.
GPS tracking and onboard equipment collect information throughout the process. This data allows for a precise comparison between the destroyer’s actual performance and the standards defined by the Navy.
Unlike isolated equipment evaluations, sea trials verify the combined operation of systems. Power distribution is observed while propulsion, auxiliary machinery, and onboard systems operate simultaneously.
This procedure confirms whether power supply remains stable throughout the vessel. Mechanical components, piping, and ventilation are activated sequentially and then tested together.
Engineers gradually increase the load to identify operational limits. Tests considered higher risk, such as maximum power trials, are conducted under strict supervision.
The team involved includes Bath Iron Works employees, among them mechanics and system operators. The work follows standardized procedures, with a defined sequence of operations and safety measures.
Combat systems are not fully tested at this stage. The priority remains on engineering performance, navigation, and the destroyer’s ability to operate safely at sea.
Ship Honors Patrick Gallagher
The USS Patrick Gallagher is named after a Marine Corps corporal who fought in Vietnam. Patrick Gallagher was born in Ireland in 1944, moved to the United States in 1962, and joined the Marine Corps two years later.
On July 18, 1966, during a night battle near Cam Lo, he acted to protect comrades from grenades. On that occasion, he removed one soldier from danger and protected another, preventing casualties.
For these actions, Gallagher received the Navy Cross. He died in combat on March 30, 1967, at the age of 23.
The destroyer bearing his name is approximately 156 meters long, has a 20-meter beam, and an approximate displacement of 9,200 tons. The crew consists of about 380 sailors.
The armament includes a 5-inch naval gun, point defense systems, and torpedo launchers. The vessel also has the capacity to operate two MH-60R helicopters, reinforcing its role in U.S. Navy naval missions.
Be the first to react!