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A Guide to Aircraft Gasoline.

Of the many fuels that we have, the type to be used on an aircraft depends on the aircraft in question. While aircrafts such as Jets use diesel others are contain engines that are designed to use 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 is one of the most commonly used aircraft fuel that has been there for a long time. The main purpose of the AV gas is to reciprocate piston engines. There are several additives that can be used on AV gas including static dissipaters, antiknock, tetraethyl, icing inhibitors, oxidation inhibitors, corrosion inhibitors, and metal deactivators.

At standard temperatures, AV gas, is highly volatile and very flammable. As a result, it should always be handled with extreme care for safety. The two main types of ratings for AV gas are lean and rich mixture ratings which are the octane ratings that define the various grades of AV gas.

Gasoline fuels are mostly prepared from hydrocarbons the most common being iso-octane. Iso-octane has excellent antiknock properties. The fuels that possess similar antiknock properties to those of iso-octane are given a rating of 100. Heptane is another example of hydrocarbons which can also be applied to fuel octane rating once it is mixed with varying amounts of iso-octyne.

Nowadays, adding lead or any other replacements gives more power to the engine before detonation. This signifies that the incorporation of lead in aviation fuel essentially makes the engines to perform better. One other crucial element of improved engine power is the fuels air ratio.
Contrary to what is believed by many, converting to the use of fuel with high octane ratings alone without changing anything else is not the only requirement of improving an engine’s power. Fuel that has a high octane rating is important in high compression engines because it assists in impeding the probability of detonation or knocking at settings involving high power.

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 the past, there were various grades of AV gas but today they have been narrowed down to only one type, which is the AV 100.

While adding lead to aviation fuel might be good in enhancing the performance of an engine during combustion, unleaded fuels are recommended for reasons relating to health. However, lead pollution is mostly caused by the millions of cars that use lead fuel.

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