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Aviation Gasoline (AVGAS) is a type of fuel specifically designed for use in aviation reciprocating engines. Here’s a detailed overview:

  • Composition:
  • Blends of Liquid Hydrocarbons: AVGAS primarily consists of blends of liquid hydrocarbons, mostly petroleum products with boiling points ranging between 32°C and 220°C.
  • Anti-Knock Rating: AVGAS has an anti-knock rating, measured in octane numbers, ranging from 80 to 145 performance numbers. This high octane rating helps prevent engine knock or detonation, which is crucial for optimal engine performance and reliability.
  • Usage:
  • Current Use: Although AVGAS was once more commonly used, its usage has significantly declined in favor of other aviation fuels. Today, only small quantities are used, primarily in older aircraft with reciprocating engines.
  • Specifications:
  • ASTM Specification D 910: This standard specifies the requirements for aviation gasoline to ensure its quality and performance.
  • Military Specification MIL-G-5572: This specification outlines the standards for aviation gasoline used by military aircraft.
  • Additives:
  • Additives: AVGAS may contain small quantities of additives to improve performance, stability, and safety.
  • Note: Data on blending components (the individual hydrocarbons mixed to create AVGAS) are not included in the data on the finished product.

AVGAS is specifically tailored for the needs of aviation engines, balancing performance, safety, and stability.

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