Wikipedia:WikiProject Aircraft/Engines/Categories

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Aero engine articles are categorised inline with the guidance at Wikipedia:Categorization.

Engines are usually categorised by type, era (defined by first run date and sorted into decades) and manufacturer. Categories should be kept as specific as possible using sub-categories, for example the Rolls-Royce Trent appears in Category:High-bypass turbofan engines but not Category:Turbofan engines. It also appears in Category:Rolls-Royce aircraft gas turbine engines but not Category:Rolls-Royce.