Ratings and main standard values
Aerospace propulsion - An introduction

The units most commonly used in this article are those of the International System (SI). Speed is expressed in meters per second (m/s ^-1 ), pressure in pascals (Pa), or even in bars (1 bar = 105 Pa) or MPa. The thermodynamic quantities of fluids involved in propulsion involving joules (J) or watts (W), for example specific heat capacities (c _p , c _V , and by extension r), are in J.kg ^-1 .K ^-1 . Temperatures are expressed in kelvins (K).

The main Anglo-Saxon units still used in articles and works...