Which factor does not affect the performance of an RPAS during flight?

The performance of a Remotely Piloted Aircraft System (RPAS) during flight can be influenced by various environmental factors, such as wind shear, humidity, and precipitation. Wind shear refers to a sudden change in wind speed or direction, which can impact the drone's stability and control. High humidity can affect battery performance and drone components, leading to reduced efficiency. Exposure to precipitation, like rain, can damage electronic components and sensors, as well as affect visibility and flight stability.

In contrast, excessive sunlight primarily affects the operating temperature of the drone rather than its flight performance. While it can lead to thermal issues or impact battery efficiency slightly, excessive sunlight does not directly compromise the control, stability, or functionality of the drone in the same way that wind, humidity, and precipitation can. Therefore, excessive sunlight is considered not to affect the actual flight performance of the RPAS.