How much AvGas is required to fly 620 NM under day VFR conditions with a 12 knot tailwind at 6,000 feet?

To determine the amount of AvGas required for a flight of 620 nautical miles under day VFR conditions with a 12-knot tailwind at 6,000 feet, we first need to estimate the airspeed of the aircraft, typically expressed in knots, as well as its fuel consumption rate.

When calculating fuel needs, consider the following steps:

1. Determine Ground Speed: If we assume the cruise airspeed of the aircraft is, for example, 160 knots, the effective ground speed, given the 12-knot tailwind, would be 160 + 12 = 172 knots.

2. Calculate Flight Time: The time to cover 620 nautical miles at a ground speed of 172 knots can be calculated using the formula:

Flight Time (hours) = Distance (NM) / Ground Speed (knots)

Which yields:

( \text{Flight Time} = \frac{620 \text{NM}}{172 \text{knots}} \approx 3.60 \text{ hours} )

3. Estimate Fuel Consumption: Next, if the aircraft burns, for example, 12 gallons of fuel per hour, then the total fuel