Production of Aviation Fuel
The production of aviation fuel falls into two categories: fuels suitable for turbine engines and fuels suitable for piston engine aircraft. There are international specifications for both. Aviation gasoline, Avgas, is used in piston engine aircraft where the emphasis is on anti-knock characteristics. The fuel must meet performance guidelines for both the rich mixture condition required for higher power during take-off and the weak mixture which permits economic cruising. Jet fuel used for turbine engines must remain pumpable at low temperatures, meet definite limits in terms of density and calorific value and burn cleanly and remain stable when heated to high temperatures.
Avgas is sold in much lower volumes, but to many more individual aircraft, whereas jet fuel is sold in high volumes to large aircraft operated typically by airlines, military and large corporate aircraft.
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—Charles Darwin (1809–1882)
“From the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.”
—Charles Darwin (1809–1882)
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