The , the most prolific aircraft carrier design in history, used two 5-cylinder Skinner Unaflow engines, but these were not steeple compounds. A non-compound Skinner Uniflow remained in service until 2013 in the Great Lakes cement carrier , installed when the vessel was re-powered in 1950.
The , a significant aircraft carrier design, utilized two 5-cylinder Skinner Unaflow engines but did not use steeple compounds. A non-compound Skinner Uniflow continued to operate until 2013 on the Great Lakes cement carrier , installed in 1950 after the vessel's re-powering.