The CHAMPION Hull is a tough Plastic Self Righting Twin Hull designed to lift the Boat out of the water for High Speed Racing.
The left side of the boat has a flood chamber. Allowing water to flow into the chamber when the boat is upside down. The weight of the water in the hull will upright the hull, or at least get it far enough over, for the prop to dig back into the water. Once the propeller is back in the water and CHAMPION is almost right side up. Apply throttle. As the boat moves forward, the water flows back out of the chamber via the transom hole.