A small watercraft including a hull of longitudinally elongated shape having a deck in its upper part, and an engine for thrusting the watercraft forwardly. The hull is formed in the forward and rearward portions of its lower part with water accommodation compartments formed with a plurality of openings for water to flow therethrough into and out of the compartments. When the watercraft is at rest, water flows into the water accommodation compartments through the openings to stabilize the hull. When the watercraft is cruising, the water in the water accommodation compartments is released therefrom through the openings, so that the watercraft lightly cruises.
A hull configuration for a small watercraft that provides a tandem straddle type seating arrangement to the rear of a bridge on which the steering handle is formed. In addition, a forward seat is also provided and the hull is configured so that the buoyancy increases if a rider shifts to the forward seat so as to maintain a generally horizontal stability for the watercraft under all conditions.
A floating body 1, which is substantially rectangular when seen from above, is provided with at least a protrusion 3 on at least either of sides in a transverse direction 5 of the floating body 1 at a level lower than a waterline 4.
This disclosure relates to an arrangement for self-righting a water craft, such as water craft from an overturned position to a normal upright position. The craft comprises a substantially enclosed room and a reverse bilge well provided in both left and right side portions in an engine room.
The current invention is an apparatus and method for an inner and outer dual hull boat capable of transforming between different levels of planing ability. The design is a gateway in the outer hull which allows water to pass through the void between the inner and outer hull. By controlling the position of a gate, the flow of water through the gateway in the forward moving boat can be controlled, which allows for the control of the planing or displacement capacity of the boat.
What has been created is the fastest sail boat that can act as a tugboat or industrially used to pull a water turbine for the production of electricity or compressed air, as compared to the capabilities of the prior arts of equal size and form. This is attained by the use of water as counterweight contained and locked-in inside an impervious pipe which may be of the same length as the boat, which is attached at the side or preferably under the hulls of a catamaran type boat, or which is attached to each lower side of a mono-hull boat;--by erecting as many large square sails as possible along the longitudinal axis of the boat in an arrangement to form an aggregate dwarf sail to bring down the centroid of the aggregate wind force close to the level of the boat to minimize the overturning moment of the wind upon the boat, thereby maximizing wind contact within the stability limits of the boat;--by making the hulls vertically thin to minimize resistance thru the water;--by adding a short float booster pipe on top of the main floater pipes, which extends beyond the front and rear ends of the hull to provide extra buoyancy on the sinking side when the boat is tilted too far.
