Hovercraft use blowers to produce a large volume of air below the hull or air cushion that is slightly above atmospheric pressure.

Hydrofoil sailboat invention. So lets see where this valuable additional boat component comes from. From Invention to Evolution. The video underneath will explain what the angle of attack is in all its simplicity.

The aerohydrofoil sailboat 10 of this invention comprises a tapered rigid airfoil or sail 11 connected to a fuselage 12 by means of an outrigger 13. The exemplary embodiment of the invention trolled by rotating the hydrofoil about the horizontal axis. Laird Hamilton a prominent figure in the invention of big wave tow-in surfing later discovered the foilboards capability to harness swell energy with the use of a jet ski pulling the rider.

If the wing is too agressive it will make the boat unstable and use too much energy on keeping the boat on top of the water. This design causes the board to leave the surface of the water at various speeds. In the field of hydrofoil sailboats it has been the general practice to employ hydrofoils that are straight along a vertical cross section and have a symmetrical foil-shaped end cross section.

Sailing has also adopted the hydrofoils to gain more speed. And seriously who invented the foiling sailing. July 22 2019 Everything about Sailing 0.

The present invention relates generally to improvements in hydrofoil sailboats and more particularly it pertains to sailboats having curved hydrofoils to improve sailing performance. Hydrofoils are typically fast speed watercraft that utilize underwater wings to rise above the surface decreasing the drag and allowing to reach higher spee. The hydrofoil sailboat of the present invention comprises forward and aft surface piercing hydrofoils and an asymmetrical wingsail.

The angle of attack is one of the most important things to optimize on your hydrofoil boat. If it is not perfect or rather good the boat will in worst case not even lift a little. The first hydrofoil boat dates back to 1906 designed and built by the Italian Inventor Enrico Forlanini 1948-1930.