Definition
An organic chemical compound made up entirely of hydrogen and carbon atoms. Hydrocarbons are the primary constituents of petroleum-based aviation fuels, oils, greases, and many solvents used in aircraft maintenance.
Plain English
A substance made of just hydrogen and carbon. Most aviation fuels and oils are mixtures of these compounds.
Context Anchor
Seen in aviation maintenance discussions of fuel, oil, solvents, combustion, leaks, fumes, and fire safety.
Derivation
From 'hydro-' (hydrogen) and 'carbon.' The name simply states what the molecule contains: hydrogen plus carbon, nothing else. Knowing this helps explain why hydrocarbons burn — both elements combine readily with oxygen to release energy.
Why Pilots Care
Aviation fuels, engine oils, and many shop solvents are hydrocarbons. They are flammable, can produce harmful vapors, and leave residues that affect seals, hoses, and finishes. Understanding this guides safe handling, storage, and material compatibility.
Intuition Check
“Hydrocarbon” does not mean the substance contains water. Here, “hydro-” refers to hydrogen, not water.
Example Sentence 1
Avgas and jet fuel are both hydrocarbon mixtures refined from crude oil.
Example Sentence 2
Technicians inspect fuel lines for hydrocarbon residue to confirm no leaks remain after maintenance.