Which fuel has a higher flash point, Jet-A or Avgas?

Which fuel has a higher flash point, Jet-A or Avgas?

• A. Jet-A
• B. Avgas
• C. Both have the same
• D. Neither has a flash point

Answer: (A)

Flash point is the lowest temperature at which enough vapor from a fuel can ignite in air with an ignition source. A higher flash point means the fuel is less prone to ignition at a given ambient temperature. Jet-A is higher because it’s kerosene-based and has lower volatility than Avgas, which is gasoline-based and contains lighter hydrocarbon molecules that vaporize more easily. As a result, Avgas produces ignitable vapors at lower temperatures, giving it a lower flash point. In typical values, Jet-A is around -40°C, while Avgas is around -45°C, so Jet-A’s flash point is higher.

Flash point is the lowest temperature at which enough vapor from a fuel can ignite in air with an ignition source. A higher flash point means the fuel is less prone to ignition at a given ambient temperature. Jet-A is higher because it’s kerosene-based and has lower volatility than Avgas, which is gasoline-based and contains lighter hydrocarbon molecules that vaporize more easily. As a result, Avgas produces ignitable vapors at lower temperatures, giving it a lower flash point. In typical values, Jet-A is around -40°C, while Avgas is around -45°C, so Jet-A’s flash point is higher.