Avgas is used in helicopters and small
aircraft that are mostly used for crop-dusting, private flying, and flight
training.
Avgas as leaded gasoline with 100
octane meets these requirements. Only aircraft with a gasoline engine can be
operated with avgas; turbine-powered aircraft or those with diesel engines
require kerosene as a fuel.
AVGAS also includes two main types,
which are AVGAS 100 and AVGAS 100LL. The 100 in both types refers to the octane
rating.
The main difference between these
types is the percentage of tetraethyl lead additive. AVGAS 100 has high lead,
while AVGAS 100LL has low lead including low amounts of tetraethyl lead.
AVGAS 100 is dyed green, whereas
AVGAS 100LL is dyed blue.
How is Avgas produced?
ü Raw refinery gasoline streams are specialized processes to produce the high-octane components required for this highly refined narrow-cut
aviation fuel.
ü The octane enhancement additive TEL-B is used if required by the
specification.
ü A colored dye is used to differentiate Avgas grades from regular
gasoline and other aviation fuels.
ü Antioxidant is added to give excellent storage stability for long-term use.
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