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Nordberg Radial Stationary Engine
https://oldmachinepress.com/2014/01/12/nordberg-stationary-radial-engine/

Forty Nordberg 11-cylinder spark-ignition radial engines in one of seven powerhouses at the Aluminum Company of America plant in Port Lavaca, Texas............

The Nordberg radial took up about half the space of an equally powerful inline engine and could be installed on a much lighter foundation.

Nordberg continued to develop the radial as its use spread to central power stations and various pumping applications, primarily for flood control and at sewage treatment plants. Nordberg soon developed a diesel version of the engine and a version that could run on a mixture of diesel and natural gas, which Nordberg dubbed Duafuel. The Duafuel engine could run on 100% diesel or as little as 5% diesel and 95% natural gas. This flexibility allowed the engine to operate with the most economical fuel mixture possible. In the diesel and Duafuel engines, the single cam now actuated a fuel pump for each cylinder, and the diesel fuel injector was in the center of the cylinder head.