Hydrofoil

A lifting surface or structure mounted beneath a vessel’s hull that, when moving through water, generates lift to raise the hull above the waterline, reducing drag and increasing speed.

A hydrofoil is a specialised marine technology designed to improve the efficiency and performance of watercraft. The hydrofoil itself is a wing-like structure, often made of metal or composite materials, positioned underwater and attached to the hull of a boat or ship. As the vessel gains speed, the hydrofoil generates lift, much like an aeroplane wing in air. This lift raises the hull of the vessel out of the water, significantly reducing hydrodynamic drag caused by the hull’s contact with the water. By minimising this resistance, hydrofoils enable vessels to travel faster and more efficiently, often with reduced fuel consumption.

Hydrofoils are commonly used in high-speed ferries, racing boats, and some recreational watercraft. They are particularly advantageous in applications where speed and efficiency are critical, such as passenger transport or competitive sailing. The design of a hydrofoil can vary, with some vessels using fully submerged foils for stability and others employing surface-piercing foils for simplicity. However, hydrofoil technology does have limitations, including increased complexity, higher costs, and reduced effectiveness in rough seas, where waves can disrupt the lift generated by the foils. Despite these challenges, hydrofoils remain a fascinating and innovative solution in marine engineering, offering a blend of speed, efficiency, and cutting-edge design.