Abstract: A propulsion unit for motor boats is disclosed, wherein a drive member is assembled within the hull bottom, in proximity of the transom and drives at least one propeller having a large-diameter hub and being placed outside the hull in proximity of the transom.
Abstract: Positioning and retaining system for removable tubular elements to be fastened to the hull (1) of a boat, of the type comprising at least one guide (2a, 2b) that can be coupled to at least one of said removable tubular elements. This guide being advantageously embedded within the same boat hull.
Abstract: Described herein is a differentiated sandwich laminate (comprising an outer layer, an intermediate layer or “center”, and an inner layer), in which the resin used for making the outer layer is different from, and incompatible with, the resin used for making the inner layer.
The inner layer and outer layer of sandwich laminate of the adjacent layers of two different sandwich laminates, made according to the invention, are made to adhere in a watertight manner to each other using mechanical-assembly means.
Abstract: A bottom assembly for motor boats is described, of the type including at least one longitudinal tunnel, through which passes a propeller shaft exiting from the bottom, wherein there is provided at least one ground wall to close, totally or partially, the tunnel and limit the entry of water into the same during boat advancement.
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