Hydrofoils or Whale Tails, are a device that attaches to your outboard or outdrives cavitation plate that provides lift at the stern of the boat which brings the bow of the boat down. This action is essential to get your boat up on plane quicker which saves gas and time and can increase overall speed. Hydrofoils are especially beneficial to small outboard motors as usually these units do not have power trim and have a very small cavitation plate and do not provide much lift. Porpoising is a condition in which a boat will "bounce" while underway. The use of a hydrofoil will help eliminate this condition as it forces the bow down at all times. The other benefit of a hydrofoil is the gas savings it can provide. This is possible by getting the boat up on plane quicker and sometimes higher so there is less contact with the water. Large horsepower outboards can also benefit from the use of a hydrofoil as well. The power trim result is exaggerated and needs less movement to achieve the same result. A hydrofoil is a great investment that will provide a better ride for all boat styles and sizes.