W engine

A W engine is a type of piston engine where three or four cylinder banks use the same crankshaft, resembling the letter W when viewed from the front.^[1]^[2]^[3]

W engines with three banks of cylinders are also called "broad arrow" engines, due to their shape resembling the British government broad arrow property mark.^[1]^[4]

W engines are less common than V engines. Compared with a V engine, a W engine is typically shorter and wider.

^ ^a ^b Domonoske, Arthur Boquer; Finch, Volney Cecil (1936). Aircraft engines: theory, analysis, design, and operation (Engineering textbook). J. Wiley & Sons. p. 7. Retrieved 2014-04-25. The W, or broad arrow engine, has three rows of cylinders of which the central row is vertical with the other two rows forming equal angles with the vertical.
^ Taylor, Charles Fayette (1985) [1968]. The Internal-combustion Engine in Theory and Practice: Combustion, fuels, materials, design. Massachusetts Institute of Technology. ISBN 0-262-70027-1. LCCN 84028885. Retrieved 2013-12-17. W engine is similar to a V engine but with three banks of cylinders. The two V angles are usually equal.
^ Rajput, R. K. (December 2005). Internal Combustion Engines. New Delhi, India: Laxmi Publications. ISBN 817008637X. Retrieved 2013-12-17. W-engine Same as V-engine except with three banks of cylinders on the same crankshaft.
^ "The New Sunbeam Overhead Valve Type Engines", Aviation Week and Space Technology, vol. 3, McGraw-Hill, p. 32, 1917

[Wiley1936-1] Domonoske, Arthur Boquer; Finch, Volney Cecil (1936). Aircraft engines: theory, analysis, design, and operation (Engineering textbook). J. Wiley & Sons. p. 7. Retrieved 2014-04-25. The W, or broad arrow engine, has three rows of cylinders of which the central row is vertical with the other two rows forming equal angles with the vertical.

[2] Taylor, Charles Fayette (1985) [1968]. The Internal-combustion Engine in Theory and Practice: Combustion, fuels, materials, design. Massachusetts Institute of Technology. ISBN 0-262-70027-1. LCCN 84028885. Retrieved 2013-12-17. W engine is similar to a V engine but with three banks of cylinders. The two V angles are usually equal.

[3] Rajput, R. K. (December 2005). Internal Combustion Engines. New Delhi, India: Laxmi Publications. ISBN 817008637X. Retrieved 2013-12-17. W-engine Same as V-engine except with three banks of cylinders on the same crankshaft.

[NewSunbeam32-4] "The New Sunbeam Overhead Valve Type Engines", Aviation Week and Space Technology, vol. 3, McGraw-Hill, p. 32, 1917

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