What is the maximum duration of flight for Single-engine aircraft with less than 48 gallons usable fuel?

For single-engine aircraft with less than 48 gallons of usable fuel, the maximum duration of flight is often determined by the aircraft's fuel consumption rate and endurance. Typically, when assessing maximum flight duration for aircraft under these conditions, a conservative estimate is applied to ensure safety margins, including considerations for reserve fuel.

The selected answer of 2 hours 30 minutes aligns with standard best practices in aviation where a safety reserve is typically factored. This duration assumes a moderate fuel consumption rate and accounts for a necessary reserve that would prevent running out of fuel during unforeseen circumstances such as deviations from the flight plan or weather changes.

Choosing a duration longer than 2 hours 30 minutes may expose the aircraft to risks associated with fuel exhaustion and insufficient reserves, considering that various factors like weight, weather, and aircraft performance can influence actual flight time.