Swallow tailed boat hull

Abstract

A water craft is disclosed where the hull divides in the aft section from or near the central fore and aft line of the craft and sweeping out toward the beam of the craft on both sides so that a roofed swallow tail is formed with its widest separation toward the stern of the craft allowing smooth motion through the water while providing maximum stability.

Description

TECHNICAL FIELD [0001] The present invention relates to an improved hull for water craft. DESCRIPTION OF RELATED ART [0002] Water craft hulls typically have a pointed end known as the bow and widen in breadth toward the middle of the craft and then tend to narrow in breadth toward the stern. This traditional configuration of hulls is well known. The width of the hull at the waterline typically goes from a point at the bow to the widest about mid-ships and narrower at the stern. Displacement and semi displacement hull forms tend to narrow significantly at the stern while planing craft tend to narrow less at the stern and have a sharp angle where the bottom of the boat meets the transom. [0003] As the average width at the waterline is significant for the stability of craft any narrowing of the waterline affects adversely the stability of the craft. contact with the water and more easily or even being able at all to Displacement and semi displacement hull tend not to have the sharp edg...

AI Technical Summary

Benefits of technology

[0004] According to the present invention there is provided a hull for water craft comprising traditional hull shapes with the hull splitting into two toward the stern with the width at the waterline being substantially maintained. The average waterline width is thus increased while flow of water past and under the craft is not significantly restricted. The inner part of splits may have a sharp angle where the two sides converge to facilitate the break with the water flow, which facilitates planing. The same configuration can be used on tunnel hulled and multi-hulled craft where wetted areas, sponsons, and pontoons can have port or starboard parts of the swallow tail to improve stability and speed. With a slight heel on the craft the swallow tails increase the waterline length and reduce drag. The sharp angle of convergence between the two sides of the swallow tail combined with its direction slightly across the beam of the boat means that the craft more easily breaks contact with the water flowing past it thus making it possible for hulls which were predominantly semi-planing and displacement craft to have a possibility to plane.

Problems solved by technology

As the average width at the waterline is significant for the stability of craft any narrowing of the waterline affects adversely the stability of the craft. contact with the water and more easily or even being able at all to Displacement and semi displacement hull tend not to have the sharp edge between the bottom of the boat and a transom which would help them to break come up on the plane.

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