Postwar Development of the Reciprocating Engine

Over a period of 10 years, the horsepower output of the C18 engine has been increased about 60%, its specific weight reduced about 40%. At the same time the engine has met demands for better operating economy and greater dependability.

To attain these improvements, many important design modifications have been necessary, most of them in the power section of the engine, the authors report, although the ignition system has also come in for its share of attention.