1. New model runabout, characterized in that it essentially consists of a helmet or frame of rigid material modeado, provided with a seat, and an insulated housing the motor compartment, which completely pierces the center to allow passage of the impeller to the water, wherein the helmet as a whole a perimeter recess allowing the housing therein a pneumatic chamber in the same way that fits into a conventional wheel of a vehicle, being held by the tire pressure when inflated, being achieved buoyancy of the boat, thus emptying the hull as the pneumatic chamber that surrounds it. 2. New model of light craft.
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