Also known as boxer, horizontally opposed, O engine, horizontally-opposed engine
engine configuration with horizontally opposed cylinders, usually a flat-V or boxer configuration
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Animation (with errors) of a boxer engine Benz Contramotor, the first commercial flat-engine design, ca. 1899
A flat engine is a piston engine where the cylinders are located on either side of a central crankshaft. Flat engines are also known as horizontally opposed engines, however this is distinct from the less common opposed-piston engine design, whereby each cylinder has two pistons sharing a central combustion chamber.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).