PEDAL BOAT WITH 3 HULLS FOR CHANGING DIRECTIONS TO LEFT AND RIGHT SIDES WITHOUT OPERATING A RUDDER BY INSTALLING HULLS AT BOTH SIDES OF A BODY UNIT AND A WATERWAY BETWEEN THE BODY UNIT AND THE HULL

摘要

PURPOSE: A pedal boat with 3 hulls is provided to obtain high propulsion efficiency by a turbine comprising a square hub and a blade and to remove water resistance generated by the turbine without lifting wholly the turbine by a folding unit. CONSTITUTION: A pedal boat with 3 hulls(H) is composed of a boat body having the hull installed at both sides of a body unit(10) mounted with a pedal(P) and a waterway(W) formed between the body unit and the hull; a turbine installed in the waterway and composed of a square hub(12) rotated by the driving of the pedal and blades extended at the constant size along each side; and a folding unit disposed at the side of at least one of the blades to fold a portion of the blade. The end of the blade is bent oppositely to the rotational direction of the blade.