How about the mechanical efficiency of the turbofan engine?
Of course, this is not absolute, and design-related, but there can be a concept, the current efficiency of the turbine engine is generally higher than the four-stroke gasoline engine.
, The gasoline engine is a piston engine, the piston engine can only output shaft power, which means that it can only drive the propeller to do the work, the use of propeller, then the aircraft is beyond the speed of sound, and the turbine engine can output thrust, all with the turbine
But also the efficiency of gasoline engines than turbine engines to high, but the gasoline engine in the aviation field was eliminated the main reason there are two:
At present, the efficiency of the four-stroke gasoline engine is lower than the turbine engine.
