Contents
What are the different grades of avgas and what are their colors?
Grades
| Grade | Colour (Dye) | Lead (Pb) content maximum (g/L) |
|---|---|---|
| 91/96UL | none | 0 |
| B91/115 | green (yellow + blue) | 1.60 |
| 100LL | blue | 0.56 |
| 100/130 (“avgas 100”) | green (yellow + blue) | 1.12 |
What are the 3 grades of avgas?
Types of avgas
- Avgas 100. The standard high-octane fuel for aviation piston engines.
- Avgas 100LL. This grade is the low-lead version of Avgas 100.
- Avgas 80. This type of avgas is no longer in production.
- Avgas 115.
- Avgas UL91 and Avgas UL94.
- Future unleaded avgas.
What is the most important quality of avgas?
The world’s most-used aviation fuel due to its anti-knock characteristics (100 octane) and its low lead content. Its ability to adapt to different temperatures and pressures ensures greater levels of safety for airplanes. This gasoline is imported from production refineries in Europe and the United States.
What is the octane rating of avgas?
The Lean Mixture rating is 100 octane (15 octane higher than the comparable 85 MON for unleaded Mogas) but Avgas also has a Rich Mixture rating of 130 which allows higher supercharger boost pressures to be used without detonation occurring.
Will 110 octane hurt my car?
High octane race fuel is sort of the same way. So, the moral of the story is; unless you have at least 12:1 compression (of more), do not run any 110 octane or higher race gas in it or you’ll go slower.
Why is Avgas 100 octane?
They Have Different Octane Ratings The most common avgas is 100 octane, which is a measure of the fuel’s ability to resist premature detonation or “knock.” Avgas is also available at other octanes such as 87 and 130, but they are rare today. High-octane auto gas is available as an alternative.
What’s the difference between leaded and unleaded avgas?
(Unleaded avgas is also available.) Because tetraethyllead is an expensive and polluting ingredient, in leaded avgas the minimum amount needed to bring the fuel to the required octane rating is used; actual concentrations are often lower than the permissible maximum.
What are the different grades of AVGAS fuel?
There are two main avgas grades (100 and 100LL low lead) used in the general aviation community. In each of these types, the numbers represent the octane rating. There are also other types of avgas that are either rarely used or no longer in production.
Why is avgas the only remaining transportation fuel containing lead?
Avgas is the only remaining lead-containing transportation fuel. Lead in avgas prevents damaging engine knock, or detonation, that can result in a sudden engine failure. Lead is a toxic substance that can be inhaled or absorbed in the bloodstream, and the FAA and EPA and industry are partnering to remove it from avgas.
How many milligrams of lead in one gram of avgas?
For example, 100/130 avgas has an octane rating of 100 at the lean settings usually used for cruising and 130 at the rich settings used for take-off and other full-power conditions. Additives such as TEL help to control detonation and provide lubrication. One gram of TEL contains 640.6 milligrams of lead. 100LL (blue)