Hydrofoil stabilizer
OwnerNicola Leonardisinventor
Life of this patent
Estimating the term…
Abstract
A hydrofoil stabilizer for a marine craft employing an outboard or inboard/outboard motor. The stabilizer is specially shaped to have a central position adapted to attach to an existing cavitation plate of the motor, two upwardly sloping portions the angles of which approximate the bottom of the marine craft, and two peripheral portions adapted to improve the stability of the craft by running in relatively less turbulent water away from the immediate vicinity of the propellor. The stabilizer improves the turning and tracking characteristics of the craft.
Claims11
A stabilizer plate for a marine craft having a bottom disposed at least at one angle and employing a motor with an outboard leg including a propeller having a predetermined diameter and an existing cavitation plate connected thereto, the stabilizer plate comprising:
- a substantially flat central portion including an attachment means to attach the central portion to the existing cavitation plate on the motor;
- two substantially flat, longitudinally disposed upwardly sloping portions, one either side of the central portion, said central portion and said upwardly sloping portions extending rearwardly from the outboard leg beyond the extent of the propeller approximately the length of one diameter of said propeller beyond the propeller, each upwardly sloping portion having an inner edge nearer the central portion and an outer edge;
- and
- two peripheral portions, one for each upwardly sloping portion, attached to a respective outer edge of each of the upwardly sloping portions.
A stabilizer plate for a marine craft having a bottom disposed at least at one angle and employing a motor having a propeller of a predetermined diameter and having an outboard leg and an existing cavitation plate connected thereto in which there is provided:
- a substantially flat central portion including an attachment means to attach the central portion to the existing cavitation plate on the motor, said central portion being of a width similar to that of the existing cavitation plate and being shaped and dimensioned to capture water thrown up by the propeller;
- two substantially flat, longitudinally disposed, upwardly sloping portions, one portion being disposed on either side of the central portion, said central portion and said upwardly sloping portions extending rearwardly from the outboard leg beyond the extent of the propeller approximately the length of one diameter of said propeller beyond the propeller, each upwardly sloping portion having an inner edge nearer the central portion and an outer edge, the angle of said upwardly sloping portions approximating the angle of the bottom of the marine craft and being shaped and dimensioned to skim the wake of the craft when running;
- and
- two peripheral portions, one for each upwardly sloping portion, attached to a respective outer edge of each of the upwardly sloping portions, the angle of the peripheral portions being between 0 degrees and 45 degrees below a plane parallel to a plane containing the central portion, and said peripheral portions being shaped and dimensioned to run in a relatively less turbulent water away from the immediate vicinity of a propeller.
A marine craft having a bottom disposed at least at one angle and employing a motor having a propeller of a predetermined diameter and having an outboard leg in which there is provided a stabilizer plate connected to the outboard leg, and positioned such that a substantial portion of the plate has a lower surface adapted to be located just in or skimming the surface of the water in the wake produced by said marine craft, and said plate comprising:
- a substantially flat central portion with an attachment means to attach the central portion to an existing cavitation plate on the motor, said central portion being of a width similar to that of the existing cavitation plate and being adapted to capture water thrown up by the propeller;
- two substantially flat, longitudinally disposed, upwardly sloping portions, one portion being disposed on either side of the central portion, said central portion and said upwardly sloping portions extending rearwardly from the outboard leg beyond the extent of the propeller approximately the length of one diameter of said propeller beyond the propeller, each of said upwardly sloping portions having an inner edge nearer the central portion and an outer edge, the angle of said upwardly sloping portions approximating the angle of the bottom of the marine craft and being adapted to skim the wake of the craft when running;
- and
- two peripheral portions, one for each upwardly sloping portion, attached to a respective outer edge of each of the upwardly sloping portions, the peripheral portions being between 0 degrees and 45 degrees below a plane parallel to a plane containing the central portion, and said peripheral portions being adapted to run in relatively less turbulent water away from the immediate vicinity of a propeller.
Dependencies are inferred from the claim text.