Of the many fuels that we have, the type to be used on an aircraft depends on the aircraft in question. While Jets use diesel fuels, other aircrafts have engines that run on Mogas or AV gas. This article presents an insight into the AV gas properties and benefits.
Aviation gasoline or AV gas is a type of fuel that most piston-powered aircrafts use. It one unique type of aircraft gasoline that has been in use for a long time. Aviation gasoline is essential in enhancing the functionality of piston engines. It has various additives such as tetraethyl, metal deactivator, antiknock, icing inhibitors, color dies, static dissipaters, corrosion inhibitors, and oxidation inhibitors.
At normal temperatures, this type of gas is very volatile and highly flammable. As a result, it should always be handled with extreme care for safety. AV gas has the lean, and the rich mixture ratings that are the octane ratings used in defining the different AV gasoline grades.
Gasoline fuels are mostly formed from hydrocarbons with the most popular being Iso-octane. Iso-octanes are hydrocarbons that have outstanding antiknock properties. The fuels that have antiknock properties that bear resemblance to those of iso-octane are mostly rated 100. Heptane is another hydrocarbon that can be combined with iso-octane in controlled amounts to allow an octane rating of the reference fuel.
In recent times, lead additives, and other necessary additions result to a high engine power before detonation. This signifies that the incorporation of lead in aviation fuel essentially makes the engines to perform better. The fuels air ratio is also a significant factor in the improvement of an engine’s power.
Opposite to the beliefs of most people, is the fact that you need more than fuel with high octane ratings to increase the power of an engine. High octane rated fuels are essential in high compression engines due to fact that they help to delay the probability of knocking or detonation at high power settings.
The next category of AV gas is the AV gas 100LL that has a low lead content of 0.5 gr/ltr. We also have the AV gas 82UL, which is unleaded and is mostly used in the low compression ratio engines.
In previous times, AV gas had a number of grades in use but today they have been reduced to only the AV 100.
While lead additives are good for increasing an engines resistance to detonation during combustion, unleaded fuels are more preferred for health reasons. Nevertheless, most lead pollutants result from the combustion in the many cars that use lead fuel.