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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Aircraft General Knowledge - Airframe, Systems, Powerplant > Which fuel-economy advantage helps explain the use of high-bypass turbofans, rather than comparable basic turbojets, for high-subsonic commercial transport?

637 - ATPL Question Bank in English - Which fuel-economy advantage helps explain the use of high-bypass turbofans, rather than comparable basic turbojets, for high-subsonic commercial transport?

Question 637 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot Licence

Twin spool or triple spool jet engines require a high by pass ratio.

Their bypass airflow permits efficient production of thrust, reducing fuel consumption for a given useful thrust

They are lighter than straight jet engines.

They produce less noise.

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