Last Updated
：2025/12/07
N1
（ plural ）
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(aviation) The rotational speed of the low-pressure spool of a multiple-spool gas turbine engine, expressed as a percentage of a certain reference rotational speed.
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N1
Before takeoff the pilot checked the N1 to ensure the engine was producing the required thrust.
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Before takeoff the pilot checked the N1 to ensure the engine was producing the required thrust.
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