Average N1% during cruise

Hey everyone!

I’ve been itching to know about the average N1% (fan speed) during cruise for different aircraft types. I know it’s a bit of a mixed bag depending on factors like the aircraft model, weight, altitude, and even the weather. I’m trying to get a better understanding of how engines are optimized for fuel efficiency during the cruise phase of flight.

Thanks in advance !!


It depends on the plane, the newer ones which have guides have mentions in the QRG that there’s a certain N1% you shouldn’t exceed. Like A330 ideally you shouldn’t exceed 91% N1 in cruise. But then A380, sometimes you can go over 100% and @AndrewWu found that it’s actually more efficient over 100% N1. Of course this is just for infinite flight but hope that helps


Somewhere between 80-90% is what I aim for.

Well yeh i agree with you all it mainley depends on the plane you fly

Most A380 climbs go over 100% N1 and sometimes this even happens during cruise.

The N1 rate can depend on many things such as weight and balance, wind, air density, temperature, etc.

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Caveat that it’s more efficient over 100% because you’re at a higher altitude. With the same altitude lower N1 is more efficient.

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