EntityQ5457710· pop 9· linked from 227 articlesflat-twelveSign in to saveHorizontally-opposed 12-cylinder piston engineConnectionsreciprocating engineEntityflat engineEntitysingle and double-acting cylindersEntitybeam engineEntityInternational Standard Book NumberEntitycenter of massEntitycrankshaftEntitytwo-stroke engineEntityfour-stroke engineEntityradial engineEntityV engineEntityChurchillEntityV8EntityV12EntityFerrari TestarossaEntitystraight engineEntityV6Entitystraight-four engineEntityrotary engineEntityNewcomen atmospheric engineEntityCategoriesFlat enginesPiston engine configurations