A detachable planing enhancement system with two substantial planing surface areas attached symmetrically on the transom of an inflatable sportboat to provide a substantial lifting force thereon. The system includes a method of quick attachment and detachment to the transom of the inflatable sportboat and means to ventilate such planing surfaces with air to reduce drag at high planing speeds. The planing surfaces and attachment components are comprised of plastic compatible with the injection molding process of fabrication.
Pneumatic boat (1) including two inflatable buoyancy chambers (2) extending at least on either side and kept spaced apart by a rigid bottom and by a rear panel (6), at least one stabilizing flap (15) being secured to the base of the rear panel (6) so as to extend rearwards beyond the latter; the flap (15) is fixed to the base of the rear panel (6) by a wing (11) and screws (12) capable of allowing the flap to occupy, selectively, a functional position and a nonfunctional position; the flap (15) is dimensioned and shaped such that, in the functional position, it extends, laterally, beyond the lateral edge of the base of the rear panel (6) and such that its lateral edge (16) is engaged under the corresponding inflatable chamber (2) and simply bears freely, vertically upwards, against the latter.
