What is a primary purpose of ground spoilers?

The primary purpose of ground spoilers is to reduce lift on the wings upon landing. When an aircraft touches down, spoilers are deployed to disrupt the airflow over the wings, effectively decreasing lift. This reduction in lift allows for better wheel-to-ground contact, which enhances braking efficiency and helps bring the aircraft to a stop more quickly.

By using spoilers in this manner, pilots can ensure that the maximum weight is transferred to the landing gear, maximizing traction and minimizing the distance required to stop the aircraft. This function is especially crucial during landing operations on shorter runways or in adverse weather conditions where stopping distance is a critical factor.

The other choices provided do not accurately reflect the function of ground spoilers. For instance, while they might seem relevant in different contexts, they do not pertain directly to the specific role of ground spoilers during landing.