For a fan jet engine, the by-pass ratio is the:

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Question ATPL - Airline Transport Pilot license - Aircraft General Knowledge - Airframe, Systems, Powerplant

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External airflow mass divided by the internal airflow mass

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Internal Airflow Mass Divided By The Fuel Flow Mass

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Internal airflow mass divided by the external airflow mass

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Fuel flow mass divided by the internal airflow mass

Id 220 - ATPL - For a fan jet engine, the by-pass ratio is the: