Tandem engine

1.A steam engine having two or more steam cylinders in line, with a common piston rod.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Higher horsepower capacities are available in tandem engine dynamometer configurations.
Coopers can sometimes be seen at work and two other highlights are an extraordinary 1920s car in the shape of a bottle of Worthington and a big Robey Tandem engine of 1905, which is in steam most summer Sundays.
Hathorn Davey steam engines: Tandem engines pumped sewage through underground pipes to a farm two miles away.