Quote:
Originally Posted by Tervuren
Horizontally Opposed seems to be what "boxer" is slang for.
The cylinders move in opposition away and towards.
If one drops the opposed and just uses horizontal, or flat, it becomes ambiguous between a boxer or a flat V.
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No, it is just a term for engines with the cylinder banks directly opposite on another, as opposed to another arrangement of cylinders, like a v-engine, an inline engine, a radial engine, etc.
A boxer is only one type of horizontally opposed engine.
A flat engine is slang for a horizontally opposed engine.