Aviation Fuel (JET A1 JET A)

• High Energy Density (Calorific Value):
  • Aviation kerosene has a high net calorific value, typically around 43 MJ/kg. This means it releases a large amount of energy per unit mass, which is crucial for maximizing aircraft range and payload capacity.
• Low Freezing Point:
  • A critical feature for high-altitude flight, where temperatures can drop below -50°C.
  • Jet A-1 (the most common type) has a freezing point of ≤ -47°C.
  • Jet B (used in extremely cold climates) has an even lower freezing point of ≤ -60°C.
  • This ensures the fuel remains liquid and flowable, preventing fuel line blockages and engine failure.
• High Flash Point:
  • The flash point is the minimum temperature at which fuel vapor can ignite.
  • Aviation kerosene has a relatively high flash point (≥ 38°C for Jet A-1), making it much safer to handle, store, and transport compared to gasoline (which has a flash point of around -43°C). It requires a higher temperature to ignite accidentally.
• Excellent Combustion Characteristics:
  • Stable and Complete Combustion: It burns cleanly, producing minimal smoke and carbon deposits (low tendency to form coke). This is essential for maintaining engine efficiency and preventing damage.
  • Reliable Ignition: It ignites easily and burns consistently across a wide range of engine operating conditions.
• High Purity and Cleanliness:
• • It is highly refined to remove impurities like sulfur, water, and solid particles.
  • Low Sulfur Content: Typically ≤ 0.3% by mass, which reduces engine corrosion and harmful emissions.
  • No Free Water: Water can cause corrosion, icing, and microbial growth, so its presence is strictly controlled.
• Good Low-Temperature Fluidity:
  • Even at very low temperatures, aviation kerosene maintains a low viscosity, ensuring it can be pumped efficiently through the aircraft's fuel system.
• Thermal and Oxidative Stability:
  • It resists breaking down or forming harmful deposits when exposed to high temperatures in the engine's fuel system, even during supersonic flight.
• Compatibility with Materials:
  • It is designed to be compatible with the materials used in aircraft fuel systems, including seals, gaskets, and metals, preventing swelling, hardening, or corrosion.
• Static Dissipation:
  • Additives are included to improve electrical conductivity (typically ≥ 50 pS/m), which helps dissipate static electricity generated during fueling, preventing sparks that could ignite fuel vapor.