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Grades of avgas are identified by two numbers associated with its Motor Octane Number (MON). [11] . The first number indicates the octane rating of the fuel tested to "aviation lean" standards, which is similar to the anti-knock index or "pump rating" given to automotive gasoline in the US.
28 Φεβ 2002 · The autogas (MON) octane number is similar to the aviation rating of octane up to 100 octane, according to ASTM D 2700. When you purchase autogas, the octane rating is the average of the RON...
1 Οκτ 2023 · The various types of avgas are labeled using numbers and letters. The numbers represent the octane rating, and the letters indicate the additives in the avgas. Octane rating is the standard measure of a fuel’s ability to withstand compression in the engine without detonating.
An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without causing engine knocking. The higher the octane number, the more compression the fuel can withstand before detonating.
The first number indicates the octane rating of the fuel in a lean fuel-air mixture, and the second number indicates the octane rating of the fuel in a rich mixture. Due to the small size of the worldwide aviation gasoline market, a single 100 octane low-lead fuel (100LL) is desired as the only AVGAS for all aircraft with reciprocating engines.
Aviation gasoline – Used in reciprocating or piston engines. Aviation turbine fuels (jet fuels) – Used in turbo-fan, turbo-jet, and turbo-prop engines. Within these two groups, avgas is split by octane grade and jet fuels are divided into civil and military grades.
The standard high-octane fuel for aviation piston engines. It has a high lead content and is dyed green. There are two major specifications for Avgas 100: the ASTM D910 and UK DEF STAN 91-090. These two differ over antioxidant content, oxidation stability requirements and max lead content.
