Archive > Real-world aviation

Question for school, and why don\'t fans go trough the sound barrier/

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EHM-1001 Robert:
Well, I just red on the net, that these modern 2-way engines do not spin so fast. The most inner shaft rotates probably with 9000 rpm only.

EHM-1651 Christian:
The rotation speed of the N1 fan compared to the N2 speed will be different from the different producers of engines, Rolls Roys uses some sort of system to alow the N1 fan to have a slightly slower speed than the rest of the engine.

BTW: On a modern turbofan engine the N1 fan can produce as much as up to 2/3 of the thrust while the jet engine produceses the last third of thrust.

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