Page 64: of Maritime Reporter Magazine (December 1986)

LM1600 Intercooled Regenerative Engine LM1600 Intercooled Regenerative

Engine Performance

A New Level of Performance & Efficiency

Snatl Horsepower

PROPULSION

UPDATE

General Electric Expands LM Family

Of Aeroderivative Gas Turbines

For Marine Service —Free Literature Offered—

With its first installation in the

GTS Admiral Wm. M. Callaghan, a

RO/RO cargo ship in 1969, the Gen- eral Electric LM2500 marine gas turbine has been a favorite selection for naval ship propulsion.

Powering ships with displace- ments ranging from just over 200 tons to the planned 53,000-ton

AOE-6 combat support ships, the

LM2500 has been selected by 15 international navies, as well as the

U.S. Navy itself. More than 500

LM2500s will be fitted on 223 ships in 28 navy ship programs.

The new U.S. Navy Arleigh Burke Class destroyer (DDG-51) is powered by the Gen- eral Electric LM2500.

Recently, the U.S. Navy selected the LM2500 to power the new Ar- leigh Burke Class destroyers (DDG- 51), which will be one of the Navy's major surface combatant ships. For these destroyers, the LM2500 will be uprated to 26,250 hp and have single shank high-pressure turbine blades. The Navy selected the

LM2500 because its more than 1.5-

Royal Danish Navy Standard Flex 300 ship. of the best fuel efficiencies in its power class. Its extremely high pow- er density enables the engine to pro- duce the same power output with an airflow of 100 pounds per second (pps) as did earlier engines with air- flows of 125 to 145 pps. The fuel- efficient LM1600's size is said to make it ideal for industrial mechan- ical drive, power generation and ship propulsion.

The LM1600 Intercooled Regen- erative engine is being studied in a development program funded by the U.S. Navy as a major candidate for the next generation naval en- gine. Requirements for this engine include delivery of 24,000 bhp at 100°F, while consuming 30 percent less fuel and fitting into the same space as the current LM2500s.

One of the direct results of this development will be a gas turbine engine which can effectively match diesel fuel consumption over a wide range of power output. This would clearly be of interest to both naval and commercial ship designers and builders in the mid- to late 1990s.

For free color literature contain- ing detailed information about Gen- eral Electric's LM family of ad- vanced marine gas turbines,

Circle 97 on Reader Service Card

General Electric's LM1600 Simple Cycle Gas Generator.

The LM2500 Marine Gas Turbine, selected by 15 international navies to power ships ranging in size from 200 tons to 53,000 tons displacement. million hours of reliable service, and current and future programs incor- porating the LM2500 will ensure production until 2030.

This year, the smaller LM500, rated at 6,000 hp, was selected by the Royal Danish Navy to power its new Standard Flex 300 ships. The installation of the LM500s in the

Standard Flex 300s not only marks the company's first installation in a mine countermeasure ship, but also in a naval combatant as well. It is also said to be the first LM engine in a combined diesel and gas turbine (CODAG) propulsion system. The power turbine of the LM500 will drive a fixed-pitch propeller directly through a reduction gear, saving weight by eliminating an engine- mounted epicyclic gearbox. Some of the design features that make the

LM500 attractive to marine and in- dustrial operators include: the high- est efficiency in its power class; the use of corrosion-resistant materials; borescope inspection ports for re- duced maintenance; a variable sta- tor compressor for good stall margin and an operational envelope from -54°C to 54°C; and reliability.

In addition to the Standard Flex 300, the LM500 is said to be ideal for patrol boats in the 100- to 300- ton range, and is excellent for air- cushion vehicles, fast-attack craft and vessels such as the Italian Navy

Spaviera Class hydrofoil, where higher power density, weight and size are at a premium.

In the fall of this year, the

LM1600 simple cycle gas generator was added to the expanding General

Electric LM family of advanced aeroderivative gas turbines. This new entry was derived from the highly respected F404 aircraft en- gine which powers the Navy's F/A- 18.

The LM1600's introductory rat- ing is 19,000 isentropic gas hp with an overall gas generator thermal ef- ficiency of 40.2 percent. Incorporat- ing the F404's simple design and reliability, the LM1600 features one 66 Maritime Reporter/Engineering News