How much air is used to lift the 5ft hovercraft?

The amount of air used to lift a 5-foot hovercraft depends on its design and the weight it needs to support. Generally, hovercrafts generate lift by forcing air beneath them through a fan system, creating a pressure difference. The specific volume of air required can vary, but it typically involves a substantial flow rate to create enough lift to counteract the weight of the craft and its payload. For precise calculations, factors like the hovercraft's weight, the efficiency of the fan, and the surrounding atmospheric conditions would need to be considered.