Last Updated：2025/12/07

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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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Source Word

N1

Noun

Japanese Meaning

多段式ガスタービンエンジンにおける低圧側スプールの回転速度。特定の基準回転速度に対する割合として表される。

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Before takeoff the pilot checked the N1 to ensure the engine was producing the required thrust.

Google Translation / DeepL Translation

離陸前に、操縦士はエンジンが必要な推力を発生していることを確認するために、低圧スプールの回転速度（基準回転数に対する百分率）を点検した。

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Sense（1）

The load factor and engine N1 data fluctuations recorded on the FDR suggested that flight 587 encountered the wake of Japan Air Lines flight 47 for the second time between about 0915:50 and 0915:54 and that the motion of the airplane was affected by the wake vortex during this time.

Google Translation / DeepL Translation

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N1s

（ plural ）

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N1

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