How much fuel is required to travel 457 NM at a consumption rate of 91 pounds per hour and a groundspeed of 168 knots?

To determine the fuel required for a flight of 457 nautical miles (NM) at a consumption rate of 91 pounds per hour and a groundspeed of 168 knots, first, you will need to calculate the total flight time in hours.

The flight time can be calculated using the formula:

Flight Time (hours) = Distance (NM) / Groundspeed (knots)

Substituting in the known values:

Flight Time = 457 NM / 168 knots ≈ 2.73 hours

Next, to find the total fuel consumption for the trip, you will multiply the flight time by the fuel consumption rate:

Fuel Required (pounds) = Flight Time (hours) × Fuel Consumption Rate (pounds per hour)

Substituting the values:

Fuel Required = 2.73 hours × 91 pounds per hour ≈ 248.43 pounds

Since the question typically asks for whole pounds, this rounds to approximately 248 pounds.

Therefore, the correct answer indicating the amount of fuel needed for the journey is 248 pounds. This calculation effectively uses the relationships between distance, speed, time, and fuel consumption to arrive at a clear conclusion, which reinforces the understanding of how these factors work together in flight planning.