The two main sources of information used to calculate turbojet thrust are the:
Domanda 199, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license
| Fan rotation speed (or N1) or the EPR (Engine Pressure Ratio). |
| Fan rotation speed (or N1) or the total pressure at the low pressure turbine outlet. |
| Fan rotation speed (or N1) or the total pressure at the high pressure compressor outlet. |
| High pressure turbine rotation speed or the EPR (Engine Pressure Ratio). |
