The Aerodynamic Paradox: Why Larger Aircraft Engines Can Reduce Top Speed
Contrary to common belief, installing a larger, more powerful engine on an aircraft does not always result in a higher top speed. The primary limiting factor is the increase in aerodynamic drag created by the larger engine nacelle. This added drag can offset the benefits of higher thrust, particularly as the aircraft approaches its maximum velocity. The Airbus A321neo serves as a key example, where different engine options with varying sizes result in different speed limitations. Ultimately, aircraft design involves a delicate balance between thrust, fuel efficiency, and the aerodynamic profile of the entire airframe.
Official Source: https://simpleflying.com/true-larger-engines-reducce-aircraft-top-speed/
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