N1
N1
Article Information
Category:
Content source:
Content control:
Last modified:
24.Jun.2022
Article UID:
Cite This Page
SKYbrary Aviation Safety. (June 24, 2022). N1.
Retrieved September 3, 2026
from https://skybrary.aero/articles/n1
UID: 1485
Copied!
COPY
Description
In an axial flow jet engine, N1 refers to the rotational speed of the low speed spool which consists of the fan, the low pressure compressor and the low pressure turbine, all of which are connected by a concentric shaft.
On many jet engines, N1 is the primary indication of engine thrust as an alternative to Engine Pressure Ratio (EPR) that is used on others.
Related Articles
Categories
What Links Here (33)
- Continuous Ignition
- Geared Turbofan Engine
- N1 Indicator
- N2
- N2 Indicator
- N3
- N3 Indicator
- E145, vicinity Manchester UK, 2001
- B738, Rostov-on-Don Russia, 2016
- B738, Belfast International UK, 2017
- B738, Rome Ciampino Italy, 2008
- B38M, en-route south east of Addis Ababa Ethiopia, 2019
- A320, vicinity Delhi India, 2017
- B77W, en-route, northeast of Los Angeles USA, 2016
- C550, en-route, north of Savannah GA USA, 2019
- B737, Singapore Seletar, 2017
- A320, Macau SAR China, 2018 (1)
- C560, vicinity Oslo Norway, 2017
- BCS3, Porto Portugal, 2018
- B744, Maastricht-Aachen Netherlands, 2017
- A320, vicinity Karachi Pakistan, 2020
- Engine Core and Fan De/Anti-icing
- Hot and High Operations
- Takeoff Configuration Warning Systems (TOCWS)
- Turbofan Engine
- A321, vicinity London Gatwick, UK 2020
- E195, Exeter UK, 2019
- B735, en-route, north northwest of Jakarta Indonesia, 2021
- A388, en-route, southwest Greenland, 2017
- B738, en-route, Aegean Sea, 2019
- B738, Goa India, 2016
- CL60, Calgary Canada, 2020
- B738, Calicut (Kozhikode) India, 2020
