First image: Engine room. National Archives RG-165WW Fiche 2035. Thanks to Dan Treadwell for submitting the image. The U.S. subchasers were powered by three 220-hp Standard Motor gasoline engine. (The engine in the foreground is the engine for the center propeller.)
Second image: Auxiliary engine on the right. T. Woofenden Collection.
Photo Set - click to view large versions
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