During a run-up, how much fuel is typically consumed?

During a run-up, how much fuel is typically consumed?

• A. 0.5 GAL
• B. 1 GAL
• C. 0.25 GAL
• D. 2 GAL

Answer: (B)

During a run-up the engine is kept at higher power and operating conditions to check performance, so fuel is burned just like during normal operation. The amount consumed depends on how long you hold the engine at those settings and the engine’s fuel flow at that power. For a typical DA20-C1 setup, the run-up lasts a short time and the engine’s fuel flow at the elevated RPM is enough to use about a gallon of fuel. So about 1 gallon is a reasonable, commonly cited approximation for a run-up. Choosing a smaller amount, like a quarter or half gallon, would imply far less time or fuel flow than is usually involved, while two gallons would be more than what a standard short run-up typically uses. The exact figure can vary with engine condition, mixture setting, and run-up duration, but around one gallon is the practical expectation.

During a run-up the engine is kept at higher power and operating conditions to check performance, so fuel is burned just like during normal operation. The amount consumed depends on how long you hold the engine at those settings and the engine’s fuel flow at that power. For a typical DA20-C1 setup, the run-up lasts a short time and the engine’s fuel flow at the elevated RPM is enough to use about a gallon of fuel. So about 1 gallon is a reasonable, commonly cited approximation for a run-up.

Choosing a smaller amount, like a quarter or half gallon, would imply far less time or fuel flow than is usually involved, while two gallons would be more than what a standard short run-up typically uses. The exact figure can vary with engine condition, mixture setting, and run-up duration, but around one gallon is the practical expectation.