What is the average fuel burn per hour at 75% engine power?

What is the average fuel burn per hour at 75% engine power?

• A. 12.5 gallons
• B. 15.0 gallons
• C. 20.0 gallons
• D. 17.8 gallons

Answer: (D)

Fuel burn at a given engine power setting is read from the engine’s fuel-flow curve, not by a simple straight line. At 75% cruise power, you look at the curve for that setting and take the corresponding fuel flow value. For this scenario, the data show about 17.8 gallons per hour at 75% power. That rate reflects the engine’s fuel demand at that specific power level—higher than idle or low-power settings, but not as high as full power. Using this, you can estimate endurance by dividing your remaining fuel gallons by 17.8. The other numbers would align with different power settings or data and don’t match the curve point for 75% power.

Fuel burn at a given engine power setting is read from the engine’s fuel-flow curve, not by a simple straight line. At 75% cruise power, you look at the curve for that setting and take the corresponding fuel flow value. For this scenario, the data show about 17.8 gallons per hour at 75% power. That rate reflects the engine’s fuel demand at that specific power level—higher than idle or low-power settings, but not as high as full power. Using this, you can estimate endurance by dividing your remaining fuel gallons by 17.8. The other numbers would align with different power settings or data and don’t match the curve point for 75% power.