How long can you fly with 80 gallons of usable AvGas?

To determine how long you can fly with 80 gallons of usable AvGas, you need to know the fuel consumption rate of the aircraft in gallons per hour. Once you have that figure, you can calculate the flight time by dividing the total gallons of fuel by the consumption rate.

In the case of the answer being 3 hours and 30 minutes, it indicates a consumption rate of approximately 23 gallons per hour. Here's how it works:

• If the aircraft burns 23 gallons of fuel each hour, you would divide the total fuel available (80 gallons) by the hourly consumption (23 gallons).

• This calculation gives you about 3.48 hours, which can be approximated to 3 hours and 30 minutes.

This means that with 80 gallons of fuel, an aircraft consuming fuel at this rate would indeed allow for a flight duration of 3 hours and 30 minutes.

The other options suggest longer flight times, which would require unrealistically low fuel consumption rates for a typical aircraft configuration. Understanding the fuel consumption of your specific aircraft is crucial for accurate flight planning and safety in aviation.