What is the formula for determining the best range on a jet aircraft?

The correct way to determine the best range on a jet aircraft is through the formula that uses the value of VMd, which is the minimum drag speed. Best range can be roughly estimated at approximately 1.32 times the VMd. This formula is used because operating at this speed minimizes the power required for propulsion relative to the drag forces acting on the aircraft, thereby maximizing the distance traveled per unit of fuel consumed.

When the aircraft flies at this calculated speed, it achieves an optimal balance between lift, drag, and thrust, which contributes to improved fuel efficiency and allows the aircraft to cover the greatest distance with the available fuel. Understanding this relationship between speed and drag is crucial for pilots and flight planners aiming to maximize the efficiency of a flight.

Other options suggest different multipliers of VMd, but they do not align with the established aerodynamic principles for achieving the best range.