초록 ▼

An improved propulsion system is provided for inboard motor boats with planing-type hulls. A straight propeller shaft is passed through the bottom of the hull at an angle shallow enough to present a portion of the propeller above the bottom of the hull aft of the transom thereby providing a propelle

An improved propulsion system is provided for inboard motor boats with planing-type hulls. A straight propeller shaft is passed through the bottom of the hull at an angle shallow enough to present a portion of the propeller above the bottom of the hull aft of the transom thereby providing a propeller that operates partially above the running water line during planing conditions. The benefits of a planing-type hull and a surface-drive propulsion system is economically and efficiently combined in a new design for inboard motor boats. The improved design is inexpensive to manufacture, install and maintain.

대표청구항 ▼

An improved surface-drive propulsion system for an inboard motor boat, the boat including a hull-transom junction where the hull is connected to the transom, a motor, the motor being disposed aft of a mid-section, the mid-section being disposed between the stern and the bow of the boat; a transmissi

An improved surface-drive propulsion system for an inboard motor boat, the boat including a hull-transom junction where the hull is connected to the transom, a motor, the motor being disposed aft of a mid-section, the mid-section being disposed between the stern and the bow of the boat; a transmission, the transmission disposed between the motor and the stern; a propeller shaft, the propeller shaft being straight in configuration and providing a non-jointed connection between the transmission and a propeller, the propeller shaft passing through the bottom of the hull ahead of the transom, a first end of the propeller shaft being connected to the transmission, the second end of the propeller shaft being connected to the propeller; the bottom of the hull being devoid of any tunnels or grooves for accommodating the propeller shaft, the propeller shaft passing through a shaft log, the shaft log passing through a packing gland, the shaft log and packing gland being disposed at the hull where the propeller shaft passes through the hull; the propeller and the second end of the propeller shaft being disposed aft of the transom, at least a portion of the propeller being disposed above the hull-transom junction and at least a portion of the propeller operating above the running surface of the water during planing operation of the boat.