By-pass turbine engines are mainly used in commercial aviation, because:

Question

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

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At high subsonic airspeeds they have a better propulsive efficiency than propeller or straight jet engines.

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Twin Spool Or Triple Spool Jet Engines Require A High By Pass Ratio.

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They are lighter than straight jet engines.

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They Produce Less Noise.

Id 637 - ATPL - By-pass turbine engines are mainly used in commercial aviation, because: