Which factors are essential for calculating fuel consumption during a flight?

Fuel consumption during a flight is influenced by several key factors that directly impact how much fuel is used over a particular duration. The correct choice highlights the importance of fuel flow rate, flight duration, and planned altitude.

Fuel flow rate refers to the specific amount of fuel consumed by the aircraft's engines per hour. It is a vital variable because it quantifies the ongoing fuel consumption based on engine performance and operating conditions. The flight duration naturally affects how long the engines are burning fuel; longer flights will typically require more fuel overall, while shorter flights may consume less. Planned altitude is also important as it can influence fuel efficiency; higher altitudes often allow aircraft to operate in more efficient air layers but may require adjustments in fuel consumption calculations.

Understanding these three factors provides a comprehensive view of fuel management during flight, ensuring that dispatchers can make informed decisions about fuel needs and challenges throughout the journey.