Final answer:
Most jet transport aircraft are not flown at the speed for maximum range due to considerations such as fuel efficiency, flight scheduling, air traffic control regulations, and passenger comfort, which can all influence flight speed.
Step-by-step explanation:
Most jet transport aircraft are not flown at the speed for maximum range due to a variety of practical considerations. These considerations include fuel efficiency, flight scheduling, air traffic control regulations, and passenger comfort. Fuel efficiency is a key factor, as flying faster than the optimal speed for maximum range consumes more fuel, increasing operating costs. Airlines also need to adhere to flight scheduling requirements, ensuring timely arrivals and departures, which can necessitate flying at speeds other than the most fuel-efficient one. Air traffic control regulations require maintaining safe separation between aircraft in the sky, which may influence the speed and altitude at which planes can fly. Additionally, faster speeds can lead to increased cabin noise and reduced passenger comfort, making it less desirable to fly at these higher velocities. The fate of the Concorde reflects these complexities, as its supersonic speeds were not economically viable for widespread commercial use.