Question

To achieve the maximum range with a turbojet aircraft, the aircraft should be flown at:

Answer 1

Turbojet aircraft should be flown at the best lift-to-drag ratio speed to maximize range, taking into account factors like air resistance and fuel efficiency.

Step-by-step explanation:

To achieve the maximum range with a turbojet aircraft, the aircraft should be flown at the best lift-to-drag ratio speed. This ensures the most efficient use of fuel and power to overcome air resistance. In the context of the provided information, while the drag coefficient is assumed to be constant, it's important to note that in practice, drag can vary with speed and the design of the aircraft. For example, at highway speeds, over 50% of a car's power is used to overcome air drag. Similarly, an aircraft must be flown at a speed that offers the most efficient cruise, balancing air resistance and fuel consumption. During the oil crisis in the 1970s, the most fuel-efficient cruising speed was discovered to be about 70-80 km/h (45-50 mi/h) for cars, and while this is not directly applicable to aircraft, it illustrates the impact of air drag on vehicle efficiency.