Final answer:
Aircraft should not be operated at speeds greater than the maximum speeds set on highways during the 1970s oil crisis in the United States, which was about 90 km/h (55 mi/h). When aircraft operate at higher speeds, they experience increased drag diversion, increased fuel consumption, and decreased longitudinal stability.
Step-by-step explanation:
Aircraft should not be operated at speeds greater than the maximum speeds set on highways during the 1970s oil crisis in the United States, which was about 90 km/h (55 mi/h). When aircraft operate at higher speeds, they experience increased drag diversion, which means more power and fuel consumption is required to overcome the resistance of air drag. Additionally, operating at high speeds can lead to decreased
longitudinal stability, making it more difficult to control and maintain the desired flight path.