Questions tagged [avgas]

Avgas, short for aviation gasoline, is an aviation fuel used to propel piston-engined aircraft.

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Does a diesel piston engine's power decrease more slowly with altitude than with an AVGAS engine?

I have a power-altitude curve of the Austro Engine AE-300 provided by manufacturer and I don't know the reason why power decrease lower than other engines. The curve is in the end of the pdf in this ...
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9 votes
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Can I assume that AVGAS can be used without any problem when the engine manual suggests RON 95 or higher?

Can AVGAS 100 LL be used without any problem in Rotax 912i engine which suggests a fuel with RON 95 or higher? What would be the advantages of using AVGAS over unleaded RON 95 gasoline?
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How to safely handle AVGAS (100LL)?

Obviously 100LL is risky. It's got lead in it, so there's going to be some danger. But is it possible to not get lead into my system when I start flying? It is, for obvious reasons, something I wish ...
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What is the Difference between mogas and avgas? [duplicate]

Could anybody tell me the primary differences between mogas and avgas?
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Why does the FAA not support UL102 (formerly 100SF) unleaded av-gas as an alternative to 100LL fuel?

The specifications for UL 102 are described in this Wikipedia article. The fuel appears to exceed the specifications of 100LL in octane number and energy per unit volume although the fuel weighs 7 ...
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Why does Jet A currently cost roughly the same as 100LL?

I thought Jet A was substantially cheaper than 100LL but I recently looked at the prices throughout my area, and they are both priced at approximately $5.50 per gallon. I've never flown an aircraft ...
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Why is alcoholic gasoline such a showstopper for aviation?

One of the main reasons the common avgas grades are still full of 3-plumba-3,3-diethylpentane is the incompatibility of many aircraft fuel systems with the oxygenates (primarily ethanol, with some ...
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Do different grades of leaded avgas differ in ways other than their lead content?

Although only one grade of leaded avgas (100LL, standing for 100-octane, Low-Lead)1 is in common use today, there were formerly a number of different leaded avgasses with higher octane ratings and ...
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What implications does automobile electrification have for the supply and cost of Avgas?

The electrification of automobiles has been picking up pace recently, with various countries and manufacturers setting targets for an electric- or electric/hybrid- only future. If these plans come to ...
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How small can turbojet engines be made whilst remaining fuel efficient, light, cheap, and producing enough thrust to carry a human, gas, and casing? [closed]

I've seen many videos of small turbojet engines (small enough to hold in your hands) that produce 30-40 pounds of force. If you mounted a couple of these on a small craft, that wouldn't even support ...
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Why is jet fuel cheaper than piston fuel?

Why is Jet-A cheaper than 100LL? Shouldn't it be the other way around?
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What is the freezing point of 100LL Avgas?

Does anyone knows the exact freezing point of Avgas (100LL) ? I found that Jet A-1 freezes at −47 °C / −53 °F (wikipedia), but didn't manage to find any info on Avgas.
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Avoiding leaded gasoline in aviation [closed]

I would like to get into aviation, but I have concern about the leaded gasoline used in most small engine planes. How difficult will it be to avoid avgas while learning to fly? And how should I go ...
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How should Isopropyl Alcohol be used as an AvGas Fuel System Icing Inhibitor?

I understand that 100% Isopropyl Alcohol (IPA) is used as a Fuel System Icing Inhibitor (FSII) additive in aviation gasoline systems—including 87 through 100LL fuel types—for cold weather operations. ...
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Is there a fuel injector cleaner additive available?

I have not seen any additives (such as those used in automobiles) to clean and maintain fuel injectors in aviation engines. Is there a reason for that such as the use of lead in 100LL or something ...
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Why is AVGAS so much more expensive than car gas?

Why is 100LL so much more expensive than gasoline for cars? I get the fact that it's 100LL, instead of 87, 91, etc. For example (as of now, 13 Oct 14), the 91 unleaded gas at my local gas station is ...
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Does the lead in fuel harm passengers?

In view of this other question, does the lead first enter or infiltrate the cabin air dispersion system, and then pervade or permeate the entire passenger cabin, thus every breathing passenger? I ...
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