U. S. Navy PG-84 Class CODOG Propulsion Plant 670952

The PG-84 Class is the first class application of a combined diesel or gas turbine (CODOG) powerplant in a United States Naval ship. A controllable-reversible pitch propeller provides the means of reversal. The marinization work necessary to adapt an aircraft gas turbine for marine use is described. Although some operating problems have developed in the first few months of service, the CODOG concept has been proven to provide great improvements over the characteristics available either with all diesel or all gas turbine drive.


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