Self propelled water-craft - has horizontal fins below hull propelled by rocking to expel water from between hull and fins

摘要

The float is fitted with a foot rest (2) on either side, and a central handle. The underside of the hull has a fin on each side. These are fixed along the central edge of the craft. The outside edges of the fins are located by stiffening ribs (6) supported from the vertical pivot (7). The front edge of the fins have return springs with adjustable compression. The fins broaden out towards the opened rear end, and the craft is propelled by expelling the water between the fin and hull.