Final answer:
The ground effect reduces hover power requirements by creating a cushion of air that provides additional lift to aircraft flying close to the ground.
Step-by-step explanation:
The ground reduces hover power requirements through a phenomenon called the ground effect. When an aircraft or object is near the ground, the ground effect causes an increase in lift and a decrease in drag, allowing for more efficient flight.
In the ground effect, the air pressure beneath the wings or other lifting surfaces is higher than the pressure above, creating a cushion of air that provides additional lift. This effect is particularly pronounced in helicopters and aircraft that fly close to the ground.
By flying in the ground effect, aircraft can reduce the amount of power they need to hover or maintain level flight, resulting in fuel savings and improved performance.