What does "N1" mean?

Right above the power, there is a green number that says “N1” followed by a percentage. What does that mean?

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I believe it’s the engine thrust (as compared to the power which you can adjust below)

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I believe is engine No.1

Ehm, you sure?

Nope, lol…

N1 is the rotational speed of the engine section expressed as a percentage of a nominal value. The low pressure compressor in the engine (LP), that is N1.

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