DEFINITION:

Aviation turbine fuel: propellant used in jet engines. Jet fuel, or more commonly kerosene, is a refined petroleum distillate intermediate in volatility between gasoline and gasoil. Several grades can be found. In civil aviation, kerosene Jet A1 (or Jet A in the USA), is used world-wide. For military applications, kerosene is often used with additives to improve its properties. Link with «Emissions pollution». Lubricant: substance interposed between rotating parts to limit friction and wear. Aviation lubricants are ester based compounds and are very stable at temperatures met in the engines.

(Source: ACARE Domain 309)

SUBDOMAINS:

In a jet engine, a lubricant has two main functions:

• lubricate rotating parts such as bearings and gears, to limit wear and friction
• evacuate the heat generated between these rotating parts

Secondary functions can be mentioned, such as remove particles of wear or pollution and protect parts against corrosion.