Aviation Dictionary

N1

Spool speed expressed in percent rpm. N1 on a turboprop is the gas producer speed. N1 on a turbofan or turbojet engine is the fan speed or low pressure spool speed.

Dictionary Term

N1

Definition

Spool speed expressed in percent rpm. N1 on a turboprop is the gas producer speed. N1 on a turbofan or turbojet engine is the fan speed or low pressure spool speed.

References

Airplane Flying Handbook · Federal Aviation Administration · 2021