The LM2500+G4 Engine

Photo courtesy of the Italian Navy

LM2500+G4 is the fourth generation of the industry-leading LM2500. Main features are increased power (17%) compared to the third generation LM2500+, and the same high reliability, availability and the same high efficiency (lower SFC).

The LM2500+G4 system's modular design provides for easy and timely repair and refurbishment, with its split compressor casing, in-place blade and vane replacement, in-place hot-section maintenance and external fuel nozzles. The LM2500+G4 is ideal for the Italian, French and Moroccan FREMM frigates and other military ships, and is available as a generator set.

Models

LM2500+G4

The LM2500+G4 gas turbine provides 47,370-shp, and is the most powerful and efficient member of the LM2500 family.

Technical

Output 47,370 shp (35,320 kW)
SFC .352 lb/shp-hr (214 g/kW-hr)
Heat rate 6,469 Btu/shp-hr
8,675 Btu/kWs-hr
9,150 kJ/kWs-hr
Exhaust gas flow 205 lb/sec (93 kg/sec)
Exhaust gas temperature 1,020°F (549°C)
Power turbine speed 3600 rpm
Average performance, 60 Hertz, 59°F, sea level, 60% relative humidity, no inlet/exhaust losses