초록 ▼

A boat stabilizer is disclosed for substantially eliminating “porpoising”or up and down movement of the bow portion of a boat as the boat is moving through the water. The stabilizer includes a wedge-shaped member formed on an adjustably mounted trim tab located on the underside of an anti-cavitation

A boat stabilizer is disclosed for substantially eliminating “porpoising”or up and down movement of the bow portion of a boat as the boat is moving through the water. The stabilizer includes a wedge-shaped member formed on an adjustably mounted trim tab located on the underside of an anti-cavitation plate of an outboard motor. The wedge-shaped member has a downwardly inclined lower surface extending generally laterally from and perpendicularly to a fin-shaped member of the trim tab. Movement of the boat through the water imparts a force against the downwardly inclined surface to effect a generally vertical torque on the boat substantially eliminating porpoising of the boat in a given speed range. The force imparted against the downwardly inclined surface is proportional to the angle of attack of the downwardly inclined surface so that upward displacement of the bow of the boat moving through the water is opposed by a proportionately greater force on the downwardly inclined surface. A number of stabilizers are provided with the angle of the downwardly inclined surface relative to the anti-cavitation plate being different for each stabilizer so that an appropriate stabilizer can be selected for different boat/outboard motor combinations.

대표청구항 ▼

A boat stabilizer adapted for use with a boat having an outboard motor employing an anti-cavitation plate having a generally horizontal lower surface vertically above a propeller driven by the motor, the stabilizer comprising: a support detachably attached to the lower surface of the anti-cavitation

A boat stabilizer adapted for use with a boat having an outboard motor employing an anti-cavitation plate having a generally horizontal lower surface vertically above a propeller driven by the motor, the stabilizer comprising: a support detachably attached to the lower surface of the anti-cavitation plate, the attachment providing for adjustable movement of said support in a plane generally parallel to the lower surface; a generally vertical fin-shaped member extending downwardly from said support and having laterally facing side surfaces for being positioned in response to movement of said support and for receiving a force imparted by moving water in contact with said side surfaces to induce a torque in counteraction to a torque induced by rotation of the propeller in the water; and a generally horizontally oriented wedge-shaped member formed on said support and extending rearwardly from said support, said member having a lower, generally planar surface, downwardly inclined relative to said anti-cavitation plate, whereby movement of the boat through the water imparts a force against said downwardly inclined surface to induce a torque on said boat substantially eliminating porpoising of the boat as the boat moves through the water.