As atmospheric conditions increase, how is A/C performance affected?

When atmospheric conditions, such as temperature, humidity, and altitude, become less favorable, the performance of an aircraft is adversely affected. A critical aspect of this is that as these conditions change, the aircraft's ability to lift and carry loads diminishes due to reduced air density. As the air becomes thinner at higher altitudes or hotter temperatures, the engine's efficiency drops, which in turn leads to a decrease in power available for lift.

The term "ACL" refers to the Aircraft Carrying Load. When atmospheric conditions worsen, the aircraft's maximum allowable capacity to carry loads is reduced. This reduction happens because the airfoil's lift capability decreases, resulting in a smaller margin for safety in load operations. Therefore, under increased atmospheric pressure or temperature conditions, the aircraft’s performance deteriorates, and the capability to carry maximum loads is also decreased.

Thus, the correct statement aligns with this understanding, emphasizing that not only does the aircraft's performance decrease, but it also faces a reduction in the Aircraft Carrying Load due to these adverse atmospheric conditions.