Marine steam engine

Early screw engines.

The majority of steamers, both war and mercantile, built during the years 1850-60, were fitted with horizontal  screw propeller engines…

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Vertical (compound) engines.

The vertical type of engine, with cylinders at the top and crank-shaft below, was adopted for merchant ships long  before…

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The Thornycroft boiler

The Thornycroft boiler ('Speedy' type)Fig. 58, consists essentially of a central upper steam cylinder A, and two smaller lower water…

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