Fin stabilizer to reduce roll for boats in turns method and apparatus

A fin stabilization system adapted to be mounted to the area of influence of a boat which consists on the longitudinal rearward laterally outward one-third section of the boat having a longitudinal, lateral and a vertical axis, the fin stabilization system comprising:

• a. a first fin and the second fin positioned in the area of influence of a boat having a rearward effective portion and a forward effect of portion and a depth whereby the first and second fins are parameterized where each are positioned to according to the following ranges,
• i. a rear base distance from the longitudinally rearward portion of the boat to the rearward effective portion between the ranges of 5 in.-12 in.,
• ii. having the distance between the forward effective portion positioned in the area of influence of the boat,
• iii. having a depth component that is less than 6 in.,
• b. whereby the fin stabilization system is adapted to maintain the roll of the boat about the longitudinal axis of no more than 20° from a horizontal plane in a turn in excess of speeds of 35 mph of the boat at a turn radius of more less than 2.5 boat lengths.

A boat hull comprising:

• a. a central hull portion;
• b. a metal multi-chambered perimeter hull portion having two side hull portions which are on opposite sides of the central hull portion, and which have forward perimeter hull portions converging toward one another at a forward end portion of the boat hull;
• c. said perimeter hull portion comprising:
• i. a plurality of multi-creased wall sections, each of which has a lengthwise axis, and each formed from a related metal sheet in a surrounding wall configuration by being bent along a plurality of generally lengthwise creases, with wall section portions extending between adjacent pairs of said creases;
• ii. said multi-creased wall sections each having end perimeter edge portions with adjacent end perimeter edge portions of adjacent multi-chambered wall sections being adjacent to one another in end-to-end relationship at a perimeter juncture location;
• iii. a plurality of baffles, with each baffle being positioned at a related perimeter juncture location, with a perimeter edge of the baffle being adjacent to the end perimeter edge portions of adjacent multi-chambered wall sections, and with the adjacent end perimeter edge portions and the perimeter edge of the adjacent baffle being welded together to form a watertight seal, and with the adjacent baffle making an air seal between interior regions of adjacent multi-chambered wall sections;
• iv. said multi-chambered wall sections and said baffles thus being joined together to provide a plurality of airtight floatation chambers, with each chamber being enclosed by a related wall section and two related end baffles, with weld connections at the related end baffles forming an airtight connection.
• v. a fin stabilization system having a first fin and a second fin positioned in an area of influence of a boat having a rearward effective portion and a forward effect of portion and a depth whereby the first and second fin is our parameterized where each are positioned to according to the following ranges,
• a rear base distance from the longitudinally rearward portion of the boat to the rearward effective portion between the ranges of 5in.-12 in.,
• having the distance between the forward effect of portion positioned in the area of influence of the boat,
• having a depth component that is less than 6 in.,
• vi. whereby the fin stabilization system is adapted to maintain the roll of the boat about the longitudinal axis of no more than 20° from a horizontal plane in a turn in excess of speeds of 35 mph of the boat at a turn radius of less than 2.5 boat lengths for turn at or greater of 90 degrees.

A method of stabilizing a boat in a turn comprising the steps of:

• a. retrieving a boat having a longitudinal length between 17 ft. and 35 ft. having a longitudinal and lateral axis
• b. maintaining the roll of the boat about the longitudinal axis during a high-speed turn that is no more than 200 with respect to the horizontal plane at speeds in excess of 35 mph and a turn of less than three boat lengths, the boat having an engine which produces a maximum horsepower,
• c. attaching a fin stabilization system to the area of influence of a boat which consists on the longitudinal rearward laterally outward one-third section of the boat having a longitudinal, lateral and a vertical axis, the fin stabilization system comprising a first fin and the second fin positioned in the area of influence of a boat having a rearward effective portion and a forward effective portion and a depth component,
• d. positioning a rear base distance from the longitudinally rearward portion of the boat to the rearward effective portion between the ranges of 5 in.-12 in.,
• e. positioning the forward effective portion positioned in the area of influence of the boat,
• f. providing the depth component that is less than 6 in.
• g. adjusting the dimensions of the first and second fin where the forward effective portion is positioned longitudinally more forward in a longer boat and it is positioned longitudinally more rearward in a shorter boat, and
• h. decreasing the depth of the first and second fins as the designed maximum horsepower of the boat is increased and increasing the depth of the first and second fins as the designed maximum horsepower of the boat is decreased.