The paper describes the development and field experience of the model DJ270G Gas Turbine, the second of the manufacturer’s “second generation” gas turbines. By combining the merits of a proven aero-derivative gas generator with an advanced power turbine, the DJ270G has been developed to provide a reliable and efficient dual shaft gas turbine. Previously established power turbine design concepts were uniquely modified to maximize the overall efficiency of the unit. The introduction rate was advanced by running the development and manufacturing programs simultaneously. Field development was minimized by completing a full load performance test program in the factory prior to start-up of the first field unit. The completed machine has achieved an output of 27,400 horsepower with a thermal efficiency of 36.3%. Four units are now in operation and have logged over 33,000 hours of successful operation.