NAPIER DELTIC

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The triangular arrangement of the 18 cylinders results in a compact engine, consisting structurally of three cylinder blocks forming the sides and three crankcases, one at each apex of the triangle. This arrangement fully exploits the mechanical simplicity of the opposed piston design. Short crankshafts are used, and as each crankpin carries one inlet and one exhaust piston, the loading on all crankpins is identical and the reciprocating forces are balanced within the engine.

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