Surf wake forming system with dual actuated trim tab

A system for forming asymmetric surf wakes behind a wakeboat, comprising:

• a hull having a port side, a starboard side, an inside, an outside, a length from the bow to the stern, a width from the port side to the starboard side, the hull being configured to float in water with a waterline on the outside of the hull;
• the hull having a yaw axis, the yaw axis running substantially vertically through the hull;
• the hull having a pitch axis, the pitch axis being orthogonal to the yaw axis and running substantially laterally across the width of the hull;
• the hull having a roll axis, the roll axis being orthogonal to the yaw axis and the pitch axis and running substantially along the length of the hull;
• the hull, when moving forward in the water, creating a wake, and a port disturbance and a starboard disturbance in the wake;
• a transom at the rear of and supported by the hull;
• a left trim tab comprising a primary subtab and a secondary subtab, the left trim tab pivotally mounted to the transom proximate the port side of the transom for rotation around a first tab axis that is substantially parallel with one of the bottom edge of the transom near the mounting point of the left trim tab and the waterline when the hull is at rest in the water, the left trim tab configured to rotate around the first tab axis from a position having decreased interaction with the water passing beneath the transom to a position having increased interaction with the water passing beneath the transom, the left trim tab further configured to, when in the position having increased interaction with the water passing beneath the transom, substantially redirect the starboard disturbance to the port side of the wake;
• and
• a right trim tab comprising a primary subtab and a secondary subtab, the right trim tab pivotally mounted to the transom proximate the starboard side of the transom for rotation around a second tab axis that is substantially parallel with one of the bottom edge of the transom near the mounting point of the right trim tab and the waterline when the hull is at rest in the water, the right trim tab configured to rotate around the second tab axis from a position having decreased interaction with the water passing beneath the transom to a position having increased interaction with the water passing beneath the transom, the right trim tab further configured to, when in the position having increased interaction with the water passing beneath the transom, substantially redirect the port disturbance to the starboard side of the wake.

A method of manufacturing a system for forming asymmetric surf wakes behind a wakeboat having an inside, an outside, a port side, a starboard side, a length from the bow to the stern, a width from the port side to the starboard side, and configured to float in water with a waterline on the outside of the wakeboat, the wakeboat having a yaw axis, the yaw axis running substantially vertically through the wakeboat, the wakeboat having a pitch axis, the pitch axis being orthogonal to the yaw axis and running substantially laterally across the width of the wakeboat, the wakeboat having a roll axis, the roll axis being orthogonal to the yaw axis and the pitch axis and running substantially along the length of the wakeboat, the wakeboat, when moving forward in the water, creating a wake and a port disturbance and a starboard disturbance in the wake, the wakeboat having a transom supported by its stern, the transom having a bottom edge, the method comprising:

• providing a trim tab configured to be supported by the transom proximate one of the port side and starboard side of the transom, the trim tab having a lift subtab and a yaw subtab;
• the yaw subtab being pivotably mounted to the lift subtab for rotation around a first tab axis between a first position and a second position, wherein the yaw subtab is configured to induce more yaw in the wakeboat in the second position than in the first position;
• the lift subtab being configured to be mounted to the transom of the wakeboat for pivotal rotation around a second tab axis that is substantially parallel with one of the bottom edge of the transom near the mounting point of the lift subtab to the transom and the waterline when the wakeboat is at rest in the water, the lift subtab being configured to rotate around the second tab axis, that is non-coincident with the first tab axis, between a first position and a second position, the lift subtab having more interaction with water when in the second position than when in the first position;
• providing means for selectively controlling rotation of the lift subtab about the second axis;
• and
• providing means for selectively controlling rotation of the yaw subtab about the first axis.