How does a dirty airplane with a high time engine perform compared to performance charts?

A dirty airplane, which refers to one that is not clean or free of contaminants such as dirt, oil, or ice, will generally experience performance degradation compared to the performance data found in performance charts. Additionally, a high-time engine, which indicates increased wear and potentially decreased efficiency, can further impact performance negatively.

Performance charts are developed under specific conditions, typically assuming that the airplane is clean and operating at optimal efficiency. When an aircraft is in a "dirty" state or has a high-time engine, factors such as increased drag and reduced power output come into play. This results in longer takeoff distances, reduced climb rates, and generally lower cruise performance than what is indicated in the charts.

Thus, when comparing actual performance in a dirty airplane with a high-time engine to the performance values derived from the charts, it is clear that the aircraft would indeed perform worse than suggested, making that the correct choice.