General Electric LM500

The General Electric LM500 is a compact marine and industrial gas turbine from GE Aviation, now GE Aerospace. Wikipedia describes it as a derivative of the TF34 aircraft turbofan, while GE's own marine page says it is adapted from the closely related CF34. It is a simple-cycle, two-shaft design with an aerodynamically coupled power turbine, a variable-stator compressor driven by a two-stage air-cooled turbine, and corrosion-resistant materials for sea service. Current versions deliver about 6,000 shaft horsepower, or 4.47 megawatts, at a thermal efficiency of 31 percent under ISO conditions, and GE rates it as the most fuel-efficient gas turbine in its output class. Its best documented naval use is in the Danish Flyvefisken-class patrol vessels, and it is also listed in the South Korean Gumdoksuri-class patrol vessels and TurboJET FoilCat fast ferries, and has been used on gas pipelines.